Update LICENSE.GPLv2

Fix topic div being hidden on iOS devices

.goreleaser.yml

@@ -13,7 +13,7 @@ builds:
     goos: [linux]
     goarch: [amd64]
   -
-    id: ntfy_arm67
+    id: ntfy_armv7
     binary: ntfy
     env:
       - CGO_ENABLED=1 # required for go-sqlite3
@@ -23,9 +23,7 @@ builds:
       - "-linkmode=external -extldflags=-static -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}"
     goos: [linux]
     goarch: [arm]
-    goarm:
-      - 6
-      - 7
+    goarm: [7]
   -
     id: ntfy_arm64
     binary: ntfy
@@ -55,6 +53,8 @@ nfpms:
       - src: config/ntfy.service
         dst: /lib/systemd/system/ntfy.service
     scripts:
+      postinstall: "scripts/postinst.sh"
+      preremove: "scripts/prerm.sh"
       postremove: "scripts/postrm.sh"
 archives:
   -
@@ -78,12 +78,35 @@ changelog:
       - '^docs:'
       - '^test:'
 dockers:
-  - dockerfile: Dockerfile
-    ids:
-      - ntfy
-    goos: linux
+  - image_templates:
+      - &amd64_image "binwiederhier/ntfy:{{ .Tag }}-amd64"
+    use: buildx
+    dockerfile: Dockerfile
     goarch: amd64
+    build_flag_templates:
+      - "--platform=linux/amd64"
+  - image_templates:
+      - &arm64v8_image "binwiederhier/ntfy:{{ .Tag }}-arm64v8"
+    use: buildx
+    dockerfile: Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm64/v8"
+  - image_templates:
+      - &armv7_image "binwiederhier/ntfy:{{ .Tag }}-armv7"
+    use: buildx
+    dockerfile: Dockerfile
+    goarch: arm
+    goarm: 7
+    build_flag_templates:
+      - "--platform=linux/arm/v7"
+docker_manifests:
+  - name_template: "binwiederhier/ntfy:latest"
     image_templates:
-      - "binwiederhier/ntfy:latest"
-      - "binwiederhier/ntfy:{{ .Tag }}"
-      - "binwiederhier/ntfy:v{{ .Major }}.{{ .Minor }}"
+      - *amd64_image
+      - *arm64v8_image
+      - *armv7_image
+  - name_template: "binwiederhier/ntfy:{{ .Tag }}"
+    image_templates:
+      - *amd64_image
+      - *arm64v8_image
+      - *armv7_image

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2021 Philipp C. Heckel
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

LICENSE.GPLv2

@@ -290,8 +290,8 @@ to attach them to the start of each source file to most effectively
 convey the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
+    ntfy
+    Copyright (C) 2021 Philipp C. Heckel
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by

README.md

@@ -1,12 +1,14 @@
 ![ntfy](server/static/img/ntfy.png)
 
 # ntfy.sh | simple HTTP-based pub-sub
+[![Release](https://img.shields.io/github/release/binwiederhier/ntfy.svg?color=success&style=flat-square)](https://github.com/binwiederhier/ntfy/releases/latest)
+[![Slack channel](https://img.shields.io/badge/slack-@gophers/binwiederhier-success.svg?logo=slack)](https://gophers.slack.com/archives/C01JMTPGF2Q)
 
 **ntfy** (pronounce: *notify*) is a simple HTTP-based [pub-sub](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern) notification service.
 It allows you to **send notifications to your phone or desktop via scripts** from any computer, entirely **without signup or cost**.
 It's also open source (as you can plainly see) if you want to run your own.
 
-I run a free version of it at **[ntfy.sh](https://ntfy.sh)**, and there's an [Android app](https://play.google.com/store/apps/details?id=io.heckel.ntfy)
+I run a free version of it at **[ntfy.sh](https://ntfy.sh)**, and there's an [open source](https://github.com/binwiederhier/ntfy-android) [Android app](https://play.google.com/store/apps/details?id=io.heckel.ntfy)
 too.
 
 <p>
@@ -136,13 +138,13 @@ sudo apt install ntfy
 
 **Debian/Ubuntu** (*manual install*)**:**
 ```bash
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_amd64.deb
-dpkg -i ntfy_1.4.6_amd64.deb
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.5.0/ntfy_1.5.0_amd64.deb
+dpkg -i ntfy_1.5.0_amd64.deb
 ```
 
 **Fedora/RHEL/CentOS:**
 ```bash
-rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_amd64.rpm
+rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.5.0/ntfy_1.5.0_amd64.rpm
 ```
 
 **Docker:**
@@ -169,19 +171,16 @@ go get -u heckel.io/ntfy
 **Manual install:**
 ```bash
 # x86_64/amd64
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_x86_64.tar.gz
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.5.0/ntfy_1.5.0_linux_x86_64.tar.gz
 
-# ARMv6
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_armv6.tar.gz
+# armv7
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.5.0/ntfy_1.5.0_linux_armv7.tar.gz
 
-# ARMv7
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_armv7.tar.gz
-
-# arm64
-wget https://github.com/binwiederhier/ntfy/releases/download/v1.4.6/ntfy_1.4.6_linux_arm64.tar.gz
+# arm64/v8
+wget https://github.com/binwiederhier/ntfy/releases/download/v1.5.0/ntfy_1.5.0_linux_arm64.tar.gz
 
 # Extract and run
-sudo tar -C /usr/bin -zxf ntfy_1.4.6_linux_x86_64.tar.gz ntfy
+sudo tar -C /usr/bin -zxf ntfy_*.tar.gz ntfy
 ./ntfy
 ```
 
@@ -199,6 +198,10 @@ To build releases, I use [GoReleaser](https://goreleaser.com/). If you have that
 ## Contributing
 I welcome any and all contributions. Just create a PR or an issue.
 
+## Contact me
+You can directly contact me [on Slack](https://gophers.slack.com/archives/C01JMTPGF2Q), or via the [GitHub issues](https://github.com/binwiederhier/ntfy/issues),
+or find more contact information [on my website](https://heckel.io/about).
+
 ## License
 Made with ❤️ by [Philipp C. Heckel](https://heckel.io).   
 The project is dual licensed under the [Apache License 2.0](LICENSE) and the [GPLv2 License](LICENSE.GPLv2).
@@ -210,5 +213,6 @@ Third party libraries and resources:
 * [GoReleaser](https://goreleaser.com/) (MIT) is used to create releases
 * [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) (MIT) is used to provide the persistent message cache
 * [Firebase Admin SDK](https://github.com/firebase/firebase-admin-go) (Apache 2.0) is used to send FCM messages
+* [github/gemoji](https://github.com/github/gemoji) (MIT) is used for emoji support (specifically the [emoji.json](https://raw.githubusercontent.com/github/gemoji/master/db/emoji.json) file)
 * [Lightbox with vanilla JS](https://yossiabramov.com/blog/vanilla-js-lightbox) 
 * [Statically linking go-sqlite3](https://www.arp242.net/static-go.html)

cmd/app.go

@@ -18,7 +18,10 @@ import (
 func New() *cli.App {
 	flags := []cli.Flag{
 		&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: "/etc/ntfy/config.yml", DefaultText: "/etc/ntfy/config.yml", Usage: "config file"},
-		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as HTTP listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-https", Aliases: []string{"L"}, EnvVars: []string{"NTFY_LISTEN_HTTPS"}, Usage: "ip:port used to as HTTPS listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "key-file", Aliases: []string{"K"}, EnvVars: []string{"NTFY_KEY_FILE"}, Usage: "private key file, if listen-https is set"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "cert-file", Aliases: []string{"E"}, EnvVars: []string{"NTFY_CERT_FILE"}, Usage: "certificate file, if listen-https is set"}),
 		altsrc.NewStringFlag(&cli.StringFlag{Name: "firebase-key-file", Aliases: []string{"F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}),
 		altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}),
 		altsrc.NewDurationFlag(&cli.DurationFlag{Name: "cache-duration", Aliases: []string{"b"}, EnvVars: []string{"NTFY_CACHE_DURATION"}, Value: config.DefaultCacheDuration, Usage: "buffer messages for this time to allow `since` requests"}),
@@ -50,6 +53,9 @@ func New() *cli.App {
 func execRun(c *cli.Context) error {
 	// Read all the options
 	listenHTTP := c.String("listen-http")
+	listenHTTPS := c.String("listen-https")
+	keyFile := c.String("key-file")
+	certFile := c.String("cert-file")
 	firebaseKeyFile := c.String("firebase-key-file")
 	cacheFile := c.String("cache-file")
 	cacheDuration := c.Duration("cache-duration")
@@ -70,10 +76,19 @@ func execRun(c *cli.Context) error {
 		return errors.New("manager interval cannot be lower than five seconds")
 	} else if cacheDuration < managerInterval {
 		return errors.New("cache duration cannot be lower than manager interval")
+	} else if keyFile != "" && !util.FileExists(keyFile) {
+		return errors.New("if set, key file must exist")
+	} else if certFile != "" && !util.FileExists(certFile) {
+		return errors.New("if set, certificate file must exist")
+	} else if listenHTTPS != "" && (keyFile == "" || certFile == "") {
+		return errors.New("if listen-https is set, both key-file and cert-file must be set")
 	}
 
 	// Run server
 	conf := config.New(listenHTTP)
+	conf.ListenHTTPS = listenHTTPS
+	conf.KeyFile = keyFile
+	conf.CertFile = certFile
 	conf.FirebaseKeyFile = firebaseKeyFile
 	conf.CacheFile = cacheFile
 	conf.CacheDuration = cacheDuration

config/config.go

@@ -27,6 +27,9 @@ const (
 // Config is the main config struct for the application. Use New to instantiate a default config struct.
 type Config struct {
 	ListenHTTP                   string
+	ListenHTTPS                   string
+	KeyFile                   string
+	CertFile                   string
 	FirebaseKeyFile              string
 	CacheFile                    string
 	CacheDuration                time.Duration
@@ -43,6 +46,9 @@ type Config struct {
 func New(listenHTTP string) *Config {
 	return &Config{
 		ListenHTTP:                   listenHTTP,
+		ListenHTTPS: "",
+		KeyFile: "",
+		CertFile: "",
 		FirebaseKeyFile:              "",
 		CacheFile:                    "",
 		CacheDuration:                DefaultCacheDuration,

config/config.yml

@@ -5,6 +5,21 @@
 #
 # listen-http: ":80"
 
+# Listen address for the HTTPS web server. If set, you must also set "key-file" and "cert-file".
+# Format: <hostname>:<port>
+#
+# listen-https:
+
+# Path to the private key file for the HTTPS web server. Not used if "listen-https" is not set.
+# Format: <filename>
+#
+# key-file:
+
+# Path to the cert file for the HTTPS web server. Not used if "listen-https" is not set.
+# Format: <filename>
+#
+# cert-file:
+
 # If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app.
 # This is optional and only required to support Android apps (which don't allow background services anymore).
 #

examples/linux-desktop-notifications/notify-desktop.sh

@@ -2,6 +2,8 @@
 # This is an example shell script showing how to consume a ntfy.sh topic using
 # a simple script. The notify-send command sends any arriving message as a desktop notification.
 
+TOPIC_URL=ntfy.sh/mytopic
+
 while read msg; do
   [ -n "$msg" ] && notify-send "$msg"
-done < <(stdbuf -i0 -o0 curl -s ntfy.sh/mytopic/raw)
+done < <(stdbuf -i0 -o0 curl -s $TOPIC_URL/raw)

examples/ssh-login-alert/ntfy-ssh-login.sh

@@ -2,6 +2,8 @@
 # This is a PAM script hook that shows how to notify you when
 # somebody logs into your server. Place at /usr/local/bin/ntfy-ssh-login.sh (with chmod +x!).
 
+TOPIC_URL=ntfy.sh/alerts
+
 if [ "${PAM_TYPE}" = "open_session" ]; then
-  echo -en "\u26A0\uFE0F SSH login to $(hostname): ${PAM_USER} from ${PAM_RHOST}" | curl -T- ntfy.sh/alerts
+  curl -H tags:warning -H prio:high -d "SSH login to $(hostname): ${PAM_USER} from ${PAM_RHOST}" "${TOPIC_URL}"
 fi

scripts/emoji-convert.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# This script reduces the size and converts the emoji.json file from https://github.com/github/gemoji/blob/master/db/emoji.json
+# to be used in the Android app (app/src/main/resources/emoji.json) and the Web UI (server/static/js/emoji.js).
+
+SCRIPTDIR="$(cd "$(dirname "$0")" && pwd)"
+ROOTDIR="$(cd "$(dirname "$0")/.." && pwd)"
+
+if [ -z "$1" ]; then
+    echo "Syntax: $0 FILE.(js|json)"
+    echo "Example:"
+    echo "  $0 emoji-converted.json"
+    echo "  $0 $ROOTDIR/server/static/js/emoji.js"
+    exit 1
+fi
+
+if [[ "$1" == *.js ]]; then
+  echo -n "// This file is generated by scripts/emoji-convert.sh to reduce the size
+// Original data source: https://github.com/github/gemoji/blob/master/db/emoji.json
+const rawEmojis = " > "$1"
+    cat "$SCRIPTDIR/emoji.json" | jq -rc 'map({emoji: .emoji,aliases: .aliases})' >> "$1"
+else
+  cat "$SCRIPTDIR/emoji.json" | jq -rc 'map({emoji: .emoji,aliases: .aliases})' > "$1"
+fi

scripts/postinst.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e
+
+# Restart systemd service if it was already running. Note that "deb-systemd-invoke try-restart" will
+# only act if the service is already running. If it's not running, it's a no-op.
+#
+# TODO: This is only tested on Debian.
+#
+if [ "$1" = "configure" ] && [ -d /run/systemd/system ]; then
+  systemctl --system daemon-reload >/dev/null || true
+  if systemctl is-active -q ntfy.service; then
+    echo "Restarting ntfy.service ..."
+    if [ -x /usr/bin/deb-systemd-invoke ]; then
+      deb-systemd-invoke try-restart ntfy.service >/dev/null || true
+    else
+      systemctl restart ntfy.service >/dev/null || true
+    fi
+  fi
+fi

scripts/postrm.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
-set -eu
-systemctl stop ntfy >/dev/null 2>&1 || true
+set -e
+
+# Delete the config if package is purged
 if [ "$1" = "purge" ]; then
-  rm -rf /etc/ntfy
+  echo "Deleting /etc/ntfy ..."
+  rm -rf /etc/ntfy || true
 fi

scripts/prerm.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+set -e
+
+# Stop systemd service
+if [ -d /run/systemd/system ] && [ "$1" = remove ]; then
+  echo "Stopping ntfy.service ..."
+  if [ -x /usr/bin/deb-systemd-invoke ]; then
+    deb-systemd-invoke stop 'ntfy.service' >/dev/null || true
+  else
+    systemctl stop ntfy >/dev/null 2>&1 || true
+  fi
+fi

server/cache_sqlite.go

@@ -3,32 +3,62 @@ package server
 import (
 	"database/sql"
 	"errors"
+	"fmt"
 	_ "github.com/mattn/go-sqlite3" // SQLite driver
+	"log"
+	"strings"
 	"time"
 )
 
+// Messages cache
 const (
-	createTableQuery = `
+	createMessagesTableQuery = `
 		BEGIN;
 		CREATE TABLE IF NOT EXISTS messages (
 			id VARCHAR(20) PRIMARY KEY,
 			time INT NOT NULL,
 			topic VARCHAR(64) NOT NULL,
-			message VARCHAR(1024) NOT NULL
+			message VARCHAR(512) NOT NULL,
+			title VARCHAR(256) NOT NULL,
+			priority INT NOT NULL,
+			tags VARCHAR(256) NOT NULL
 		);
 		CREATE INDEX IF NOT EXISTS idx_topic ON messages (topic);
 		COMMIT;
 	`
-	insertMessageQuery           = `INSERT INTO messages (id, time, topic, message) VALUES (?, ?, ?, ?)`
+	insertMessageQuery           = `INSERT INTO messages (id, time, topic, message, title, priority, tags) VALUES (?, ?, ?, ?, ?, ?, ?)`
 	pruneMessagesQuery           = `DELETE FROM messages WHERE time < ?`
 	selectMessagesSinceTimeQuery = `
-		SELECT id, time, message 
+		SELECT id, time, message, title, priority, tags
 		FROM messages 
 		WHERE topic = ? AND time >= ?
 		ORDER BY time ASC
 	`
-	selectMessageCountQuery = `SELECT count(*) FROM messages WHERE topic = ?`
-	selectTopicsQuery       = `SELECT topic, MAX(time) FROM messages GROUP BY TOPIC`
+	selectMessagesCountQuery        = `SELECT COUNT(*) FROM messages`
+	selectMessageCountForTopicQuery = `SELECT COUNT(*) FROM messages WHERE topic = ?`
+	selectTopicsQuery               = `SELECT topic, MAX(time) FROM messages GROUP BY topic`
+)
+
+// Schema management queries
+const (
+	currentSchemaVersion          = 1
+	createSchemaVersionTableQuery = `
+		CREATE TABLE IF NOT EXISTS schemaVersion (
+			id INT PRIMARY KEY,
+			version INT NOT NULL
+		);
+	`
+	insertSchemaVersion      = `INSERT INTO schemaVersion VALUES (1, ?)`
+	selectSchemaVersionQuery = `SELECT version FROM schemaVersion WHERE id = 1`
+
+	// 0 -> 1
+	migrate0To1AlterMessagesTableQuery = `
+		BEGIN;
+		ALTER TABLE messages ADD COLUMN title VARCHAR(256) NOT NULL DEFAULT('');
+		ALTER TABLE messages ADD COLUMN priority INT NOT NULL DEFAULT(0);
+		ALTER TABLE messages ADD COLUMN tags VARCHAR(256) NOT NULL DEFAULT('');
+		COMMIT;
+	`
 )
 
 type sqliteCache struct {
@@ -42,7 +72,7 @@ func newSqliteCache(filename string) (*sqliteCache, error) {
 	if err != nil {
 		return nil, err
 	}
-	if _, err := db.Exec(createTableQuery); err != nil {
+	if err := setupDB(db); err != nil {
 		return nil, err
 	}
 	return &sqliteCache{
@@ -51,7 +81,7 @@ func newSqliteCache(filename string) (*sqliteCache, error) {
 }
 
 func (c *sqliteCache) AddMessage(m *message) error {
-	_, err := c.db.Exec(insertMessageQuery, m.ID, m.Time, m.Topic, m.Message)
+	_, err := c.db.Exec(insertMessageQuery, m.ID, m.Time, m.Topic, m.Message, m.Title, m.Priority, strings.Join(m.Tags, ","))
 	return err
 }
 
@@ -64,19 +94,27 @@ func (c *sqliteCache) Messages(topic string, since sinceTime) ([]*message, error
 	messages := make([]*message, 0)
 	for rows.Next() {
 		var timestamp int64
-		var id, msg string
-		if err := rows.Scan(&id, &timestamp, &msg); err != nil {
+		var priority int
+		var id, msg, title, tagsStr string
+		if err := rows.Scan(&id, &timestamp, &msg, &title, &priority, &tagsStr); err != nil {
 			return nil, err
 		}
 		if msg == "" {
 			msg = " " // Hack: never return empty messages; this should not happen
 		}
+		var tags []string
+		if tagsStr != "" {
+			tags = strings.Split(tagsStr, ",")
+		}
 		messages = append(messages, &message{
-			ID:      id,
-			Time:    timestamp,
-			Event:   messageEvent,
-			Topic:   topic,
-			Message: msg,
+			ID:       id,
+			Time:     timestamp,
+			Event:    messageEvent,
+			Topic:    topic,
+			Message:  msg,
+			Title:    title,
+			Priority: priority,
+			Tags:     tags,
 		})
 	}
 	if err := rows.Err(); err != nil {
@@ -86,7 +124,7 @@ func (c *sqliteCache) Messages(topic string, since sinceTime) ([]*message, error
 }
 
 func (c *sqliteCache) MessageCount(topic string) (int, error) {
-	rows, err := c.db.Query(selectMessageCountQuery, topic)
+	rows, err := c.db.Query(selectMessageCountForTopicQuery, topic)
 	if err != nil {
 		return 0, err
 	}
@@ -124,7 +162,64 @@ func (s *sqliteCache) Topics() (map[string]*topic, error) {
 	return topics, nil
 }
 
-func (c *sqliteCache) Prune(keep time.Duration) error {
-	_, err := c.db.Exec(pruneMessagesQuery, time.Now().Add(-1*keep).Unix())
+func (s *sqliteCache) Prune(keep time.Duration) error {
+	_, err := s.db.Exec(pruneMessagesQuery, time.Now().Add(-1*keep).Unix())
 	return err
 }
+
+func setupDB(db *sql.DB) error {
+	// If 'messages' table does not exist, this must be a new database
+	rowsMC, err := db.Query(selectMessagesCountQuery)
+	if err != nil {
+		return setupNewDB(db)
+	}
+	defer rowsMC.Close()
+
+	// If 'messages' table exists, check 'schemaVersion' table
+	schemaVersion := 0
+	rowsSV, err := db.Query(selectSchemaVersionQuery)
+	if err == nil {
+		defer rowsSV.Close()
+		if !rowsSV.Next() {
+			return errors.New("cannot determine schema version: cache file may be corrupt")
+		}
+		if err := rowsSV.Scan(&schemaVersion); err != nil {
+			return err
+		}
+	}
+
+	// Do migrations
+	if schemaVersion == currentSchemaVersion {
+		return nil
+	} else if schemaVersion == 0 {
+		return migrateFrom0To1(db)
+	}
+	return fmt.Errorf("unexpected schema version found: %d", schemaVersion)
+}
+
+func setupNewDB(db *sql.DB) error {
+	if _, err := db.Exec(createMessagesTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(createSchemaVersionTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(insertSchemaVersion, currentSchemaVersion); err != nil {
+		return err
+	}
+	return nil
+}
+
+func migrateFrom0To1(db *sql.DB) error {
+	log.Print("Migrating cache database schema: from 0 to 1")
+	if _, err := db.Exec(migrate0To1AlterMessagesTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(createSchemaVersionTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(insertSchemaVersion, 1); err != nil {
+		return err
+	}
+	return nil
+}

server/index.gohtml

@@ -34,14 +34,14 @@
 {{end}}
 </head>
 <body>
+<div id="header"><div id="headerBox"><img src="static/img/ntfy.png" alt="ntfy"/></div></div>
 <div id="main"{{if .Topic}} style="display: none"{{end}}>
-    <h1><img src="static/img/ntfy.png" alt="ntfy"/><br/>ntfy.sh | simple HTTP-based pub-sub</h1>
+    <h1>ntfy.sh | simple HTTP-based pub-sub</h1>
     <p>
-        <b>Ntfy</b> (pronounce: <i>notify</i>) is a simple HTTP-based <a href="https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern">pub-sub</a> notification service.
-        It allows you to send notifications <a href="#subscribe-phone">to your phone</a> or desktop via scripts from any computer,
-        entirely <b>without signup or cost</b>. It's also <a href="https://github.com/binwiederhier/ntfy">open source</a> if you want to run your own.
+        <b>ntfy</b> (pronounce: <i>notify</i>) is a simple HTTP-based <a href="https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern">pub-sub</a> notification service.
+        It allows you to send notifications to your phone or desktop via scripts from any computer,
+        entirely <b>without signup, cost or setup</b>. It's also <a href="https://github.com/binwiederhier/ntfy">open source</a> if you want to run your own.
     </p>
-
     <div id="screenshots">
         <a href="static/img/screenshot-curl.png"><img src="static/img/screenshot-curl.png"/></a>
         <a href="static/img/screenshot-web-detail.png"><img src="static/img/screenshot-web-detail.png"/></a>
@@ -51,11 +51,9 @@
             <a href="static/img/screenshot-phone-notification.jpg"><img src="static/img/screenshot-phone-notification.jpg"/></a>
         </span>
     </div>
-
     <p>
-        There are many ways to use Ntfy. You can send yourself messages for all sorts of things: When a long process finishes or fails,
-        or to notify yourself when somebody logs into your server(s). Or you may want to use it in your own app to distribute messages to subscribed clients.
-        Endless possibilities 😀. Be sure to check out the <a href="#examples">examples below</a>.
+        There are many ways to use it: Notify yourself when a build finishes, when an rsync is done or a backup fails,
+        or know when somebody logs into your server. There are <a href="#examples">many more examples</a>, endless possibilities 😀.
     </p>
 
     <h2 id="publish" class="anchor">Publishing messages</h2>
@@ -64,26 +62,33 @@
         Because there is no sign-up, <b>the topic is essentially a password</b>, so pick something that's not easily guessable.
     </p>
     <p class="smallMarginBottom">
-        Here's an example showing how to publish a message using <tt>curl</tt> (via POST):
+        Here's an example showing how to publish a message using a POST request (via <tt>curl -d</tt>):
     </p>
     <code>
-        curl -d "Backup successful 😀" ntfy.sh/mytopic
-    </code>
-    <p class="smallMarginBottom">
-        And another one using PUT:
-    </p>
-    <code>
-        echo -en "\u26A0\uFE0F Unauthorized login" | curl -sT- ntfy.sh/mytopic
+        curl -d "Backup successful 😀" <span class="ntfyUrl">ntfy.sh</span>/mytopic
     </code>
     <p class="smallMarginBottom">
         Here's an example in JS with <tt>fetch()</tt> (see <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">full example</a>):
     </p>
     <code>
-        fetch('https://ntfy.sh/mytopic', {<br/>
+        fetch('https://<span class="ntfyUrl">ntfy.sh</span>/mytopic', {<br/>
         &nbsp;&nbsp;method: 'POST', // PUT works too<br/>
         &nbsp;&nbsp;body: 'Hello from the other side.'<br/>
         })
     </code>
+    <p class="smallMarginBottom">
+        There are <a href="#other-features">more features</a> related to publishing messages: You can set a
+        <a href="#priority">notification priority</a>, a <a href="#title">title</a>, and <a href="#tags">tag messages</a>.
+        Here's an example using all of them:
+    </p>
+    <code>
+        curl \<br/>
+        &nbsp;&nbsp;-H "Title: Unauthorized access detected" \<br/>
+        &nbsp;&nbsp;-H "Priority: urgent" \<br/>
+        &nbsp;&nbsp;-H "Tags: warning,skull" \<br/>
+        &nbsp;&nbsp;-d "Remote access to $(hostname) detected. Act right away." \<br/>
+        &nbsp;&nbsp;<span class="ntfyUrl">ntfy.sh</span>/mytopic
+    </code>
 
     <h2 id="subscribe" class="anchor">Subscribe to a topic</h2>
     <p>
@@ -127,7 +132,7 @@
         notifications like this (see <a href="example.html">live example</a>):
     </p>
     <code>
-        const eventSource = new EventSource('https://ntfy.sh/mytopic/sse');<br/>
+        const eventSource = new EventSource('<span class="ntfyProtocol">https://</span><span class="ntfyUrl">ntfy.sh</span>/mytopic/sse');<br/>
         eventSource.onmessage = (e) => {<br/>
         &nbsp;&nbsp;// Do something with e.data<br/>
         };
@@ -136,7 +141,7 @@
         You can also use the same <tt>/sse</tt> endpoint via <tt>curl</tt> or any other HTTP library:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/sse<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/sse<br/>
         event: open<br/>
         data: {"id":"weSj9RtNkj","time":1635528898,"event":"open","topic":"mytopic"}<br/><br/>
 
@@ -149,7 +154,7 @@
         To consume JSON instead, use the <tt>/json</tt> endpoint, which prints one message per line:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/json<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/json<br/>
         {"id":"SLiKI64DOt","time":1635528757,"event":"open","topic":"mytopic"}<br/>
         {"id":"hwQ2YpKdmg","time":1635528741,"event":"message","topic":"mytopic","message":"Hi!"}<br/>
         {"id":"DGUDShMCsc","time":1635528787,"event":"keepalive","topic":"mytopic"}
@@ -158,7 +163,7 @@
         Or use the <tt>/raw</tt> endpoint if you need something super simple (empty lines are keepalive messages):
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic/raw<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic/raw<br/>
         <br/>
         This is a notification<br/>
         And another one with a smiley face 😀
@@ -173,7 +178,7 @@
         cached messages).
     </p>
     <code>
-        curl -s "ntfy.sh/mytopic/json?since=10m"
+        curl -s "<span class="ntfyUrl">ntfy.sh</span>/mytopic/json?since=10m"
     </code>
 
     <h3 id="polling" class="anchor">Polling (<tt>poll=1</tt>)</h3>
@@ -183,7 +188,7 @@
         combined with <tt>since=</tt> (defaults to <tt>since=all</tt>).
     </p>
     <code>
-        curl -s "ntfy.sh/mytopic/json?poll=1"
+        curl -s "<span class="ntfyUrl">ntfy.sh</span>/mytopic/json?poll=1"
     </code>
 
     <h3 id="multiple-topics" class="anchor">Subscribing to multiple topics (<tt>topic1,topic2,...</tt>)</h3>
@@ -192,15 +197,58 @@
         comma-separated list of topics in the URL. This allows you to reduce the number of connections you have to maintain:
     </p>
     <code>
-        $ curl -s ntfy.sh/mytopic1,mytopic2/json<br/>
+        $ curl -s <span class="ntfyUrl">ntfy.sh</span>/mytopic1,mytopic2/json<br/>
         {"id":"0OkXIryH3H","time":1637182619,"event":"open","topic":"mytopic1,mytopic2,mytopic3"}<br/>
         {"id":"dzJJm7BCWs","time":1637182634,"event":"message","topic":"mytopic1","message":"for topic 1"}<br/>
         {"id":"Cm02DsxUHb","time":1637182643,"event":"message","topic":"mytopic2","message":"for topic 2"}
     </code>
 
+    <h3 id="priority" class="anchor">Message priority (<tt>X-Priority</tt>, <tt>Priority</tt>, <tt>prio</tt>, or <tt>p</tt>)</h3>
+    <p>
+        All messages have a priority, which defines how your urgently your phone notifies you. You can set custom
+        notification sounds and vibration patterns on your phone to map to these priorities.
+    </p>
+    <p class="smallMarginBottom">
+        The following priorities exist: <tt>1</tt> (<tt>min</tt>), <tt>2</tt> (<tt>low</tt>), <tt>3</tt> (<tt>default</tt>),
+        <tt>4</tt> (<tt>high</tt>), and <tt>5</tt> (<tt>max</tt>/<tt>urgent</tt>). You can set the priority with the
+        header <tt>X-Priority</tt> (or any of its aliases: <tt>Priority</tt>, <tt>prio</tt>, or <tt>p</tt>). Here are a few examples:
+    </p>
+    <code>
+        curl -H "X-Priority: urgent" -d "An urgent message" <span class="ntfyUrl">ntfy.sh</span>/mytopic<br/>
+        curl -H "Priority: 2" -d "Low priority message" <span class="ntfyUrl">ntfy.sh</span>/mytopic<br/>
+        curl -H p:4 -d "A high priority message" <span class="ntfyUrl">ntfy.sh</span>/mytopic
+    </code>
+
+    <h3 id="title" class="anchor">Notification title (<tt>X-Title</tt>, <tt>Title</tt>, <tt>ti</tt>, or <tt>t</tt>)</h3>
+    <p class="smallMarginBottom">
+        The notification title is typically set to the topic short URL (e.g. <tt><span class="ntfyUrl">ntfy.sh</span>/mytopic</tt>.
+        To override it, you can set the <tt>X-Title</tt> header (or any of its aliases: <tt>Title</tt>, <tt>ti</tt>, or <tt>t</tt>).
+    </p>
+    <code>
+        curl -H "Title: Dogs are better than cats" -d "Oh my ..." <span class="ntfyUrl">ntfy.sh</span>/mytopic<br/>
+    </code>
+
+    <h3 id="tags" class="anchor">Tags &amp; emojis 🥳 🎉 (<tt>X-Tags</tt>, <tt>Tags</tt>, or <tt>ta</tt>)</h3>
+    <p>
+        You can tag messages with emojis (or other relevant strings). If a tag matches a <a href="https://raw.githubusercontent.com/github/gemoji/master/db/emoji.json">known emoji short code</a>,
+        it will be converted to an emoji. If it doesn't match, it will be listed below the notification. This is useful
+        for things like warnings and such (⚠️, ️🚨, or 🚩), but also to simply tag messages otherwise (e.g. which script the
+        message came from, ...).
+    </p>
+    <p class="smallMarginBottom">
+        You can set tags with the <tt>X-Tags</tt> header (or any of its aliases: <tt>Tags</tt>, or <tt>ta</tt>).
+        Use <a href="https://raw.githubusercontent.com/github/gemoji/master/db/emoji.json">this reference</a>
+        to figure out what tags can be converted to emojis. In the example below, the tag "warning" matches the emoji ⚠️,
+        the tag "ssh-login" doesn't match and will be displayed below the message.
+    </p>
+    <code>
+        $ curl -H "Tags: warning,ssh-login" -d "Unauthorized SSH access" <span class="ntfyUrl">ntfy.sh</span>/mytopic<br/>
+        {"id":"ZEIwjfHlSS",...,"tags":["warning","ssh-login"],"message":"Unauthorized SSH access"}
+    </code>
+
     <h2 id="examples" class="anchor">Examples</h2>
     <p>
-        There are a million ways to use Ntfy, but here are some inspirations. I try to collect
+        There are a million ways to use ntfy, but here are some inspirations. I try to collect
         <a href="https://github.com/binwiederhier/ntfy/tree/main/examples">examples on GitHub</a>, so be sure to check
         those out, too.
     </p>
@@ -214,13 +262,13 @@
     <code>
         rsync -a root@laptop /backups/laptop \<br/>
         &nbsp;&nbsp;&& zfs snapshot ... \<br/>
-        &nbsp;&nbsp;&& curl -d "Laptop backup succeeded" ntfy.sh/backups \<br/>
-        &nbsp;&nbsp;|| echo -en "\u26A0\uFE0F Laptop backup failed" | curl -sT- ntfy.sh/backups
+        &nbsp;&nbsp;&& curl -d "Laptop backup succeeded" <span class="ntfyUrl">ntfy.sh</span>/backups \<br/>
+        &nbsp;&nbsp;|| curl -H tags:warning -H prio:high -d "Laptop backup failed" <span class="ntfyUrl">ntfy.sh</span>/backups
     </code>
 
     <h3 id="example-web" class="anchor">Example: Server-sent messages in your web app</h3>
     <p>
-        Just as you can <a href="#subscribe-web">subscribe to topics in this Web UI</a>, you can use Ntfy in your own
+        Just as you can <a href="#subscribe-web">subscribe to topics in this Web UI</a>, you can use ntfy in your own
         web application. Check out the <a href="example.html">live example</a> or just look the source of this page.
     </p>
 
@@ -242,7 +290,7 @@
     <code>
         #!/bin/bash<br/>
         if [ "${PAM_TYPE}" = "open_session" ]; then<br/>
-        &nbsp;&nbsp;echo -en "\u26A0\uFE0F SSH login: ${PAM_USER} from ${PAM_RHOST}" | curl -T- ntfy.sh/alerts<br/>
+        &nbsp;&nbsp;curl -H tags:warning -d "SSH login: ${PAM_USER} from ${PAM_RHOST}" <span class="ntfyUrl">ntfy.sh</span>/alerts<br/>
         fi
     </code>
 
@@ -254,7 +302,7 @@
     <code>
         while read result; do<br/>
         &nbsp;&nbsp;[ -n "$result" ] && echo "$result" >> results.csv<br/>
-        done < <(stdbuf -i0 -o0 curl -s ntfy.sh/results/raw)
+        done < <(stdbuf -i0 -o0 curl -s <span class="ntfyUrl">ntfy.sh</span>/results/raw)
     </code>
 
     <h2 id="faq" class="anchor">FAQ</h2>
@@ -302,9 +350,24 @@
         is to facilitate instant notifications on Android.
     </p>
 
+    <p>
+        <b id="battery-usage" class="anchor">How much battery does the Android app use?</b><br/>
+        If you use the ntfy.sh server and you don't use the <i>instant delivery</i> feature, the Android app uses no
+        additional battery, since Firebase Cloud Messaging (FCM) is used. If you use your own server, or you use
+        <i>instant delivery</i>, the app has to maintain a constant connection to the server, which consumes about 4% of
+        battery in 17h of use (on my phone). I use it and it makes no difference to me.
+    </p>
+
+    <p>
+        <b id="instant-delivery" class="anchor">What is instant delivery?</b><br/>
+        Instant delivery is a feature in the Android app. If turned on, the app maintains a constant connection to the
+        server and listens for incoming notifications. This consumes <a href="#battery-usage">additional battery</a>,
+        but delivers notifications instantly.
+    </p>
+
     <p>
         <b id="why-no-ios" class="anchor">Why is there no iOS app (yet)?</b><br/>
-        I don't have an iPhone or a Mac, so I didn't make an iOS app yet. I'd be awesome if
+        I don't have an iPhone or a Mac, so I didn't make an iOS app yet. It'd be awesome if
         <a href="https://github.com/binwiederhier/ntfy/issues/4">someone else could help out</a>.
     </p>
 
@@ -324,14 +387,14 @@
 </div>
 <div id="detail"{{if not .Topic}} style="display: none"{{end}}>
     <div id="detailMain">
-        <button id="detailCloseButton"><img src="static/img/close_black_24dp.svg"/></button>
-        <h1><img src="static/img/ntfy.png" alt="ntfy"/><br/><span id="detailTitle"></span></h1>
+        <button id="detailCloseButton"><img src="static/img/close.svg"/></button>
+        <h1><span id="detailTitle"></span></h1>
         <p class="smallMarginBottom">
-            <b>Ntfy</b> is a simple HTTP-based pub-sub notification service. This is a Ntfy topic.
+            <b>ntfy</b> is a simple HTTP-based pub-sub notification service. This is a ntfy topic.
             To send notifications to it, simply PUT or POST to the topic URL. Here's an example using <tt>curl</tt>:
         </p>
         <code>
-            curl -d "Backup failed" <span id="detailTopicUrl"></span>
+            curl -d "Backup failed" <span id="detailTopicUrl">ntfy.sh/topic</span>
         </code>
         <p id="detailNotificationsDisallowed">
             If you'd like to receive desktop notifications when new messages arrive on this topic, you have
@@ -348,6 +411,7 @@
     </div>
 </div>
 <div id="lightbox" class="lightbox"></div>
+<script src="static/js/emoji.js"></script>
 <script src="static/js/app.js"></script>
 </body>
 </html>

server/message.go

@@ -18,11 +18,14 @@ const (
 
 // message represents a message published to a topic
 type message struct {
-	ID      string `json:"id"`    // Random message ID
-	Time    int64  `json:"time"`  // Unix time in seconds
-	Event   string `json:"event"` // One of the above
-	Topic   string `json:"topic"`
-	Message string `json:"message,omitempty"`
+	ID       string   `json:"id"`    // Random message ID
+	Time     int64    `json:"time"`  // Unix time in seconds
+	Event    string   `json:"event"` // One of the above
+	Topic    string   `json:"topic"`
+	Priority int      `json:"priority,omitempty"`
+	Tags     []string `json:"tags,omitempty"`
+	Title    string   `json:"title,omitempty"`
+	Message  string   `json:"message,omitempty"`
 }
 
 // messageEncoder is a function that knows how to encode a message
@@ -31,11 +34,14 @@ type messageEncoder func(msg *message) (string, error)
 // newMessage creates a new message with the current timestamp
 func newMessage(event, topic, msg string) *message {
 	return &message{
-		ID:      util.RandomString(messageIDLength),
-		Time:    time.Now().Unix(),
-		Event:   event,
-		Topic:   topic,
-		Message: msg,
+		ID:       util.RandomString(messageIDLength),
+		Time:     time.Now().Unix(),
+		Event:    event,
+		Topic:    topic,
+		Priority: 0,
+		Tags:     nil,
+		Title:    "",
+		Message:  msg,
 	}
 }
 

server/server.go

@@ -89,10 +89,11 @@ var (
 	indexTemplate = template.Must(template.New("index").Parse(indexSource))
 
 	//go:embed "example.html"
-	exampleSource   string
+	exampleSource string
 
 	//go:embed static
-	webStaticFs embed.FS
+	webStaticFs       embed.FS
+	webStaticFsCached = &util.CachingEmbedFS{ModTime: time.Now(), FS: webStaticFs}
 
 	errHTTPBadRequest      = &errHTTP{http.StatusBadRequest, http.StatusText(http.StatusBadRequest)}
 	errHTTPNotFound        = &errHTTP{http.StatusNotFound, http.StatusText(http.StatusNotFound)}
@@ -150,11 +151,14 @@ func createFirebaseSubscriber(conf *config.Config) (subscriber, error) {
 		_, err := msg.Send(context.Background(), &messaging.Message{
 			Topic: m.Topic,
 			Data: map[string]string{
-				"id":      m.ID,
-				"time":    fmt.Sprintf("%d", m.Time),
-				"event":   m.Event,
-				"topic":   m.Topic,
-				"message": m.Message,
+				"id":       m.ID,
+				"time":     fmt.Sprintf("%d", m.Time),
+				"event":    m.Event,
+				"topic":    m.Topic,
+				"priority": fmt.Sprintf("%d", m.Priority),
+				"tags":     strings.Join(m.Tags, ","),
+				"title":    m.Title,
+				"message":  m.Message,
 			},
 		})
 		return err
@@ -169,13 +173,23 @@ func (s *Server) Run() error {
 			s.updateStatsAndExpire()
 		}
 	}()
-	return s.listenAndServe()
-}
+	listenStr := fmt.Sprintf("%s/http", s.config.ListenHTTP)
+	if s.config.ListenHTTPS != "" {
+		listenStr += fmt.Sprintf(" %s/https", s.config.ListenHTTPS)
+	}
+	log.Printf("Listening on %s", listenStr)
 
-func (s *Server) listenAndServe() error {
-	log.Printf("Listening on %s", s.config.ListenHTTP)
 	http.HandleFunc("/", s.handle)
-	return http.ListenAndServe(s.config.ListenHTTP, nil)
+	errChan := make(chan error)
+	go func() {
+		errChan <- http.ListenAndServe(s.config.ListenHTTP, nil)
+	}()
+	if s.config.ListenHTTPS != "" {
+		go func() {
+			errChan <- http.ListenAndServeTLS(s.config.ListenHTTPS, s.config.CertFile, s.config.KeyFile, nil)
+		}()
+	}
+	return <-errChan
 }
 
 func (s *Server) handle(w http.ResponseWriter, r *http.Request) {
@@ -228,7 +242,7 @@ func (s *Server) handleExample(w http.ResponseWriter, r *http.Request) error {
 }
 
 func (s *Server) handleStatic(w http.ResponseWriter, r *http.Request) error {
-	http.FileServer(http.FS(webStaticFs)).ServeHTTP(w, r)
+	http.FileServer(http.FS(webStaticFsCached)).ServeHTTP(w, r)
 	return nil
 }
 
@@ -246,6 +260,10 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
 	if m.Message == "" {
 		return errHTTPBadRequest
 	}
+	title, priority, tags := parseHeaders(r.Header)
+	m.Title = title
+	m.Priority = priority
+	m.Tags = tags
 	if err := t.Publish(m); err != nil {
 		return err
 	}
@@ -262,6 +280,40 @@ func (s *Server) handlePublish(w http.ResponseWriter, r *http.Request, v *visito
 	return nil
 }
 
+func parseHeaders(header http.Header) (title string, priority int, tags []string) {
+	title = readHeader(header, "x-title", "title", "ti", "t")
+	priorityStr := readHeader(header, "x-priority", "priority", "prio", "p")
+	if priorityStr != "" {
+		switch strings.ToLower(priorityStr) {
+		case "1", "min":
+			priority = 1
+		case "2", "low":
+			priority = 2
+		case "4", "high":
+			priority = 4
+		case "5", "max", "urgent":
+			priority = 5
+		default:
+			priority = 3
+		}
+	}
+	tagsStr := readHeader(header, "x-tags", "tags", "ta")
+	if tagsStr != "" {
+		tags = strings.Split(tagsStr, ",")
+	}
+	return title, priority, tags
+}
+
+func readHeader(header http.Header, names ...string) string {
+	for _, name := range names {
+		value := header.Get(name)
+		if value != "" {
+			return value
+		}
+	}
+	return ""
+}
+
 func (s *Server) handleSubscribeJSON(w http.ResponseWriter, r *http.Request, v *visitor) error {
 	encoder := func(msg *message) (string, error) {
 		var buf bytes.Buffer
@@ -414,11 +466,11 @@ func (s *Server) topicFromID(id string) (*topic, error) {
 	return topics[0], nil
 }
 
-func (s *Server) topicsFromIDs(ids... string) ([]*topic, error) {
+func (s *Server) topicsFromIDs(ids ...string) ([]*topic, error) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	topics := make([]*topic, 0)
-	for  _, id := range ids {
+	for _, id := range ids {
 		if _, ok := s.topics[id]; !ok {
 			if len(s.topics) >= s.config.GlobalTopicLimit {
 				return nil, errHTTPTooManyRequests

server/static/css/app.css

@@ -4,6 +4,8 @@ html, body {
     font-family: 'Lato', sans-serif;
     color: #333;
     font-size: 1.1em;
+    margin: 0;
+    padding: 0;
 }
 
 html {
@@ -25,6 +27,8 @@ h1 {
     margin-top: 25px;
     margin-bottom: 18px;
     font-size: 2.5em;
+    word-wrap: break-word; /* For very long topics */
+    padding-right: 40px; /* For the X on the detail page */
 }
 
 h2 {
@@ -65,6 +69,7 @@ code {
     margin-top: 10px;
     margin-bottom: 20px;
     overflow-x: auto;
+    white-space: nowrap;
 }
 
 /* Lato font (OFL), https://fonts.google.com/specimen/Lato#about,
@@ -84,6 +89,7 @@ code {
 #main {
     max-width: 900px;
     margin: 0 auto 50px auto;
+    padding: 0 10px;
 }
 
 #error {
@@ -190,6 +196,23 @@ code {
     background-color: #fff;
 }
 
+/* Header */
+
+#header {
+    background: #3a9784;
+    height: 130px;
+}
+
+#header #headerBox {
+    max-width: 900px;
+    margin: 0 auto;
+    padding: 0 10px;
+}
+
+#header img {
+    margin-top: 23px;
+}
+
 /* Subscribe box */
 
 button {
@@ -350,24 +373,28 @@ li {
 }
 
 /** Detail view */
-#detail {
-    display: none;
-    position: absolute;
-    z-index: 1;
-    left: 8px;
-    right: 8px;
-    top: 0;
-    bottom: 0;
-    background: white;
+
+#detail .detailEntry {
+    margin-bottom: 20px;
 }
 
-#detail .detailDate {
+#detail .detailDate, #detail .detailTags {
     color: #888;
     font-size: 0.9em;
 }
 
+#detail .detailDate img {
+    width: 20px;
+    height: 20px;
+    vertical-align: bottom;
+}
+
+#detail .detailTitle {
+    font-weight: bold;
+    font-size: 1.1em;
+}
+
 #detail .detailMessage {
-    margin-bottom: 20px;
     font-size: 1.1em;
 }
 
@@ -375,7 +402,7 @@ li {
     max-width: 900px;
     margin: 0 auto;
     position: relative; /* required for close button's "position: absolute" */
-    padding-bottom: 50px; /* Chrome and Firefox behave differently regarding bottom margin */
+    padding: 0 10px 50px 10px; /* Chrome and Firefox behave differently regarding bottom margin */
 }
 
 #detail #detailCloseButton {
@@ -384,7 +411,7 @@ li {
     border: none;
     padding: 5px;
     position: absolute;
-    right: 0;
+    right: 10px;
     top: 10px;
     display: block;
 }

server/static/img/priority-1.svg

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="24px"
+   viewBox="0 0 24 24"
+   width="24px"
+   fill="#000000"
+   version="1.1"
+   id="svg1428"
+   sodipodi:docname="priority_1_24dp.svg"
+   inkscape:version="1.1.1 (3bf5ae0, 2021-09-20)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1432" />
+  <sodipodi:namedview
+     id="namedview1430"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="20.517358"
+     inkscape:cx="22.834324"
+     inkscape:cy="15.742768"
+     inkscape:window-width="1863"
+     inkscape:window-height="1025"
+     inkscape:window-x="57"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1428" />
+  <path
+     style="color:#000000;fill:#999999;fill-opacity:1;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.195014,20.828316 a 1.2747098,1.2747098 0 0 0 0.661605,-0.185206 l 6.646593,-4.037178 a 1.2745823,1.2745823 0 0 0 0.427537,-1.751107 1.2745823,1.2745823 0 0 0 -1.750928,-0.427718 l -5.984807,3.635327 -5.9848086,-3.635327 a 1.2745823,1.2745823 0 0 0 -1.750927,0.427718 1.2745823,1.2745823 0 0 0 0.427536,1.751107 l 6.6464146,4.037178 a 1.2747098,1.2747098 0 0 0 0.661785,0.185206 z"
+     id="rect3554" />
+  <path
+     style="color:#000000;fill:#b3b3b3;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.195014,15.694014 a 1.2747098,1.2747098 0 0 0 0.661605,-0.185206 l 6.646593,-4.037176 A 1.2745823,1.2745823 0 0 0 19.930749,9.7205243 1.2745823,1.2745823 0 0 0 18.179821,9.2928073 L 12.195014,12.928134 6.2102054,9.2928073 a 1.2745823,1.2745823 0 0 0 -1.750927,0.427717 1.2745823,1.2745823 0 0 0 0.427536,1.7511077 l 6.6464146,4.037176 a 1.2747098,1.2747098 0 0 0 0.661785,0.185206 z"
+     id="path9314" />
+  <path
+     style="color:#000000;fill:#cccccc;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.116784,10.426777 a 1.2747098,1.2747098 0 0 0 0.661606,-0.185205 l 6.646593,-4.0371767 a 1.2745823,1.2745823 0 0 0 0.427537,-1.751108 1.2745823,1.2745823 0 0 0 -1.750928,-0.427718 l -5.984808,3.635327 -5.9848066,-3.635327 a 1.2745823,1.2745823 0 0 0 -1.750928,0.427718 1.2745823,1.2745823 0 0 0 0.427537,1.751108 L 11.455,10.241572 a 1.2747098,1.2747098 0 0 0 0.661784,0.185205 z"
+     id="path9316" />
+</svg>

server/static/img/priority-2.svg

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="24px"
+   viewBox="0 0 24 24"
+   width="24px"
+   fill="#000000"
+   version="1.1"
+   id="svg1428"
+   sodipodi:docname="priority_2_24dp.svg"
+   inkscape:version="1.1.1 (3bf5ae0, 2021-09-20)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1432" />
+  <sodipodi:namedview
+     id="namedview1430"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="20.517358"
+     inkscape:cx="22.834324"
+     inkscape:cy="15.742768"
+     inkscape:window-width="1863"
+     inkscape:window-height="1025"
+     inkscape:window-x="57"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1428" />
+  <path
+     style="color:#000000;fill:#999999;fill-opacity:1;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.172712,17.774352 a 1.2747098,1.2747098 0 0 0 0.661605,-0.185206 l 6.646593,-4.037178 a 1.2745823,1.2745823 0 0 0 0.427537,-1.751107 1.2745823,1.2745823 0 0 0 -1.750928,-0.427718 L 12.172712,15.00847 6.1879033,11.373143 a 1.2745823,1.2745823 0 0 0 -1.750927,0.427718 1.2745823,1.2745823 0 0 0 0.427536,1.751107 l 6.6464147,4.037178 a 1.2747098,1.2747098 0 0 0 0.661785,0.185206 z"
+     id="rect3554" />
+  <path
+     style="color:#000000;fill:#b3b3b3;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.172712,12.64005 a 1.2747098,1.2747098 0 0 0 0.661605,-0.185206 L 19.48091,8.4176679 A 1.2745823,1.2745823 0 0 0 19.908447,6.6665602 1.2745823,1.2745823 0 0 0 18.157519,6.2388432 L 12.172712,9.8741699 6.1879033,6.2388432 a 1.2745823,1.2745823 0 0 0 -1.750927,0.427717 1.2745823,1.2745823 0 0 0 0.427536,1.7511077 l 6.6464147,4.0371761 a 1.2747098,1.2747098 0 0 0 0.661785,0.185206 z"
+     id="path9314" />
+</svg>

server/static/img/priority-4.svg

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="24px"
+   viewBox="0 0 24 24"
+   width="24px"
+   fill="#000000"
+   version="1.1"
+   id="svg1428"
+   sodipodi:docname="priority_4_24dp.svg"
+   inkscape:version="1.1.1 (3bf5ae0, 2021-09-20)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1432" />
+  <sodipodi:namedview
+     id="namedview1430"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="20.517358"
+     inkscape:cx="22.834324"
+     inkscape:cy="15.742768"
+     inkscape:window-width="1863"
+     inkscape:window-height="1025"
+     inkscape:window-x="57"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1428" />
+  <path
+     style="color:#000000;fill:#c60000;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="M 12.116784,6.5394415 A 1.2747098,1.2747098 0 0 0 11.455179,6.724648 l -6.6465926,4.037176 a 1.2745823,1.2745823 0 0 0 -0.427537,1.751108 1.2745823,1.2745823 0 0 0 1.7509281,0.427717 l 5.9848065,-3.635327 5.984809,3.635327 A 1.2745823,1.2745823 0 0 0 19.85252,12.512932 1.2745823,1.2745823 0 0 0 19.424984,10.761824 L 12.778569,6.724648 A 1.2747098,1.2747098 0 0 0 12.116784,6.5394415 Z"
+     id="path9314" />
+  <path
+     style="color:#000000;fill:#de0000;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.195014,11.806679 a 1.2747098,1.2747098 0 0 0 -0.661606,0.185205 l -6.6465924,4.037177 a 1.2745823,1.2745823 0 0 0 -0.427537,1.751108 1.2745823,1.2745823 0 0 0 1.750928,0.427718 l 5.9848074,-3.635327 5.984807,3.635327 a 1.2745823,1.2745823 0 0 0 1.750928,-0.427718 1.2745823,1.2745823 0 0 0 -0.427537,-1.751108 l -6.646414,-4.037177 a 1.2747098,1.2747098 0 0 0 -0.661784,-0.185205 z"
+     id="path9316" />
+</svg>

server/static/img/priority-5.svg

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="24px"
+   viewBox="0 0 24 24"
+   width="24px"
+   fill="#000000"
+   version="1.1"
+   id="svg1428"
+   sodipodi:docname="priority_5_24dp.svg"
+   inkscape:version="1.1.1 (3bf5ae0, 2021-09-20)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1432" />
+  <sodipodi:namedview
+     id="namedview1430"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="20.517358"
+     inkscape:cx="22.834323"
+     inkscape:cy="15.742767"
+     inkscape:window-width="1863"
+     inkscape:window-height="1025"
+     inkscape:window-x="57"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg1428" />
+  <path
+     style="color:#000000;fill:#aa0000;fill-opacity:1;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="M 12.116784,3.40514 A 1.2747098,1.2747098 0 0 0 11.455179,3.5903463 L 4.8085864,7.6275238 A 1.2745823,1.2745823 0 0 0 4.3810494,9.3786313 1.2745823,1.2745823 0 0 0 6.1319775,9.8063489 L 12.116784,6.1710217 18.101593,9.8063489 A 1.2745823,1.2745823 0 0 0 19.85252,9.3786313 1.2745823,1.2745823 0 0 0 19.424984,7.6275238 L 12.778569,3.5903463 A 1.2747098,1.2747098 0 0 0 12.116784,3.40514 Z"
+     id="rect3554" />
+  <path
+     style="color:#000000;fill:#c60000;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="M 12.116784,8.5394415 A 1.2747098,1.2747098 0 0 0 11.455179,8.724648 l -6.6465926,4.037176 a 1.2745823,1.2745823 0 0 0 -0.427537,1.751108 1.2745823,1.2745823 0 0 0 1.7509281,0.427717 l 5.9848065,-3.635327 5.984809,3.635327 A 1.2745823,1.2745823 0 0 0 19.85252,14.512932 1.2745823,1.2745823 0 0 0 19.424984,12.761824 L 12.778569,8.724648 A 1.2747098,1.2747098 0 0 0 12.116784,8.5394415 Z"
+     id="path9314" />
+  <path
+     style="color:#000000;fill:#de0000;fill-opacity:1;stroke:none;stroke-width:0.0919748;stroke-linecap:round;stroke-linejoin:round;-inkscape-stroke:none"
+     d="m 12.195014,13.806679 a 1.2747098,1.2747098 0 0 0 -0.661606,0.185205 l -6.6465924,4.037177 a 1.2745823,1.2745823 0 0 0 -0.427537,1.751108 1.2745823,1.2745823 0 0 0 1.750928,0.427718 l 5.9848074,-3.635327 5.984807,3.635327 a 1.2745823,1.2745823 0 0 0 1.750928,-0.427718 1.2745823,1.2745823 0 0 0 -0.427537,-1.751108 l -6.646414,-4.037177 a 1.2747098,1.2747098 0 0 0 -0.661784,-0.185205 z"
+     id="path9316" />
+</svg>

server/static/js/app.js

@@ -12,6 +12,10 @@
 let topics = {};
 let currentTopic = "";
 let currentTopicUnsubscribeOnClose = false;
+let currentUrl = window.location.hostname;
+if (window.location.port) {
+    currentUrl += ':' + window.location.port
+}
 
 /* Main view */
 const main = document.getElementById("main");
@@ -56,7 +60,7 @@ const subscribeInternal = (topic, persist, delaySec) => {
         if (!topicEntry) {
             topicEntry = document.createElement('li');
             topicEntry.id = `topic-${topic}`;
-            topicEntry.innerHTML = `<a href="/${topic}" onclick="return showDetail('${topic}')">${topic}</a> <button onclick="test('${topic}'); return false;"> <img src="static/img/send_black_24dp.svg"> Test</button> <button onclick="unsubscribe('${topic}'); return false;"> <img src="static/img/clear_black_24dp.svg"> Unsubscribe</button>`;
+            topicEntry.innerHTML = `<a href="/${topic}" onclick="return showDetail('${topic}')">${topic}</a> <button onclick="test('${topic}'); return false;"> <img src="static/img/send.svg"> Test</button> <button onclick="unsubscribe('${topic}'); return false;"> <img src="static/img/unsubscribe.svg"> Unsubscribe</button>`;
             topicsList.appendChild(topicEntry);
         }
         topicsHeader.style.display = '';
@@ -64,7 +68,7 @@ const subscribeInternal = (topic, persist, delaySec) => {
         // Open event source
         let eventSource = new EventSource(`${topic}/sse`);
         eventSource.onopen = () => {
-            topicEntry.innerHTML = `<a href="/${topic}" onclick="return showDetail('${topic}')">${topic}</a> <button onclick="test('${topic}'); return false;"> <img src="static/img/send_black_24dp.svg"> Test</button> <button onclick="unsubscribe('${topic}'); return false;"> <img src="static/img/clear_black_24dp.svg"> Unsubscribe</button>`;
+            topicEntry.innerHTML = `<a href="/${topic}" onclick="return showDetail('${topic}')">${topic}</a> <button onclick="test('${topic}'); return false;"> <img src="static/img/send.svg"> Test</button> <button onclick="unsubscribe('${topic}'); return false;"> <img src="static/img/unsubscribe.svg"> Unsubscribe</button>`;
             delaySec = 0; // Reset on successful connection
         };
         eventSource.onerror = (e) => {
@@ -82,10 +86,15 @@ const subscribeInternal = (topic, persist, delaySec) => {
             }
             if (Notification.permission === "granted") {
                 notifySound.play();
-                new Notification(`${location.host}/${topic}`, {
-                    body: event.message,
+                const title = formatTitle(event);
+                const message = formatMessage(event);
+                const notification = new Notification(title, {
+                    body: message,
                     icon: '/static/img/favicon.png'
                 });
+                notification.onclick = (e) => {
+                    showDetail(event.topic);
+                };
             }
         };
         topics[topic] = {
@@ -131,29 +140,50 @@ const fetchCachedMessages = async (topic) => {
 
 const showDetail = (topic) => {
     currentTopic = topic;
-    history.replaceState(topic, `ntfy.sh/${topic}`, `/${topic}`);
+    history.replaceState(topic, `${currentUrl}/${topic}`, `/${topic}`);
     window.scrollTo(0, 0);
     rerenderDetailView();
     return false;
 };
 
 const rerenderDetailView = () => {
-    detailTitle.innerHTML = `ntfy.sh/${currentTopic}`; // document.location.replaceAll(..)
-    detailTopicUrl.innerHTML = `ntfy.sh/${currentTopic}`;
+    detailTitle.innerHTML = `${currentUrl}/${currentTopic}`; // document.location.replaceAll(..)
+    detailTopicUrl.innerHTML = `${currentUrl}/${currentTopic}`;
     while (detailEventsList.firstChild) {
         detailEventsList.removeChild(detailEventsList.firstChild);
     }
     topics[currentTopic]['messages'].forEach(m => {
-        let dateDiv = document.createElement('div');
-        let messageDiv = document.createElement('div');
-        let eventDiv = document.createElement('div');
+        const entryDiv = document.createElement('div');
+        const dateDiv = document.createElement('div');
+        const titleDiv = document.createElement('div');
+        const messageDiv = document.createElement('div');
+        const tagsDiv = document.createElement('div');
+
+        entryDiv.classList.add('detailEntry');
         dateDiv.classList.add('detailDate');
-        dateDiv.innerHTML = new Date(m.time * 1000).toLocaleString();
+        titleDiv.classList.add('detailTitle');
         messageDiv.classList.add('detailMessage');
-        messageDiv.innerText = m.message;
-        eventDiv.appendChild(dateDiv);
-        eventDiv.appendChild(messageDiv);
-        detailEventsList.appendChild(eventDiv);
+        tagsDiv.classList.add('detailTags');
+
+        const dateStr = new Date(m.time * 1000).toLocaleString();
+        if (m.priority && [1,2,4,5].includes(m.priority)) {
+            dateDiv.innerHTML = `${dateStr} <img src="static/img/priority-${m.priority}.svg"/>`;
+        } else {
+            dateDiv.innerHTML = `${dateStr}`;
+        }
+        messageDiv.innerText = formatMessage(m);
+        entryDiv.appendChild(dateDiv);
+        if (m.title) {
+            titleDiv.innerText = formatTitleA(m);
+            entryDiv.appendChild(titleDiv);
+        }
+        entryDiv.appendChild(messageDiv);
+        const otherTags = unmatchedTags(m.tags);
+        if (otherTags.length > 0) {
+            tagsDiv.innerText = `Tags: ${otherTags.join(", ")}`;
+            entryDiv.appendChild(tagsDiv);
+        }
+        detailEventsList.appendChild(entryDiv);
     })
     if (topics[currentTopic]['messages'].length === 0) {
         detailNoNotifications.style.display = '';
@@ -177,7 +207,7 @@ const hideDetailView = () => {
     currentTopic = "";
     history.replaceState('', originalTitle, '/');
     detailView.style.display = 'none';
-    main.style.display = '';
+    main.style.display = 'block';
     return false;
 };
 
@@ -254,6 +284,46 @@ const nextScreenshotKeyboardListener = (e) => {
     }
 };
 
+const formatTitle = (m) => {
+    if (m.title) {
+        return formatTitleA(m);
+    } else {
+        return `${location.host}/${m.topic}`;
+    }
+};
+
+const formatTitleA = (m) => {
+    const emojiList = toEmojis(m.tags);
+    if (emojiList) {
+        return `${emojiList.join(" ")} ${m.title}`;
+    } else {
+        return m.title;
+    }
+};
+
+const formatMessage = (m) => {
+    if (m.title) {
+        return m.message;
+    } else {
+        const emojiList = toEmojis(m.tags);
+        if (emojiList) {
+            return `${emojiList.join(" ")} ${m.message}`;
+        } else {
+            return m.message;
+        }
+    }
+};
+
+const toEmojis = (tags) => {
+    if (!tags) return [];
+    else return tags.filter(tag => tag in emojis).map(tag => emojis[tag]);
+}
+
+const unmatchedTags = (tags) => {
+    if (!tags) return [];
+    else return tags.filter(tag => !(tag in emojis));
+}
+
 // From: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
 async function* makeTextFileLineIterator(fileURL) {
     const utf8Decoder = new TextDecoder('utf-8');
@@ -347,3 +417,19 @@ document.querySelectorAll('.anchor').forEach((el) => {
         el.appendChild(anchor);
     }
 });
+
+// Change ntfy.sh url and protocol to match self-hosted one
+document.querySelectorAll('.ntfyUrl').forEach((el) => {
+    el.innerHTML = currentUrl;
+});
+document.querySelectorAll('.ntfyProtocol').forEach((el) => {
+    el.innerHTML = window.location.protocol + "//";
+});
+
+// Format emojis (see emoji.js)
+const emojis = {};
+rawEmojis.forEach(emoji => {
+    emoji.aliases.forEach(alias => {
+        emojis[alias] = emoji.emoji;
+    });
+});

util/embedfs.go

@@ -0,0 +1,55 @@
+package util
+
+import (
+	"embed"
+	"errors"
+	"io"
+	"io/fs"
+	"time"
+)
+
+type CachingEmbedFS struct {
+	ModTime time.Time
+	FS      embed.FS
+}
+
+func (f CachingEmbedFS) Open(name string) (fs.File, error) {
+	file, err := f.FS.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	stat, err := file.Stat()
+	if err != nil {
+		return nil, err
+	}
+	return &cachingEmbedFile{file, f.ModTime, stat}, nil
+}
+
+type cachingEmbedFile struct {
+	file    fs.File
+	modTime time.Time
+	fs.FileInfo
+}
+
+func (f cachingEmbedFile) Stat() (fs.FileInfo, error) {
+	return f, nil
+}
+
+func (f cachingEmbedFile) Read(bytes []byte) (int, error) {
+	return f.file.Read(bytes)
+}
+
+func (f *cachingEmbedFile) Seek(offset int64, whence int) (int64, error) {
+	if seeker, ok := f.file.(io.Seeker); ok {
+		return seeker.Seek(offset, whence)
+	}
+	return 0, errors.New("io.Seeker not implemented")
+}
+
+func (f cachingEmbedFile) ModTime() time.Time {
+	return f.modTime // We override this!
+}
+
+func (f cachingEmbedFile) Close() error {
+	return f.file.Close()
+}