feat: Update notifications: a notification and tray icon when there's a new Steamify

lib/update-notifier.sh

@@ -0,0 +1,82 @@
+#!/bin/bash
+# "Update notifications" menu item (notify), ticked by default: a systemd
+# user timer checks GitHub's newest release once a day and at each Plasma
+# login. When it's newer than the last Steamify that ran here, it shows a
+# notification (Open Steamify / Skip this version) and a tray icon until
+# then; it never updates anything itself (patches/steamify-notifier.py).
+# Sourced by steamify.sh; not meant to be run on its own.
+
+NOTIFY_DIR="${XDG_DATA_HOME:-$HOME/.local/share}/cachyos-gamescope-boot"
+NOTIFY_SCRIPT="$NOTIFY_DIR/steamify-notifier"
+NOTIFY_UNITS="${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user"
+NOTIFY_NAME=steamify-update-check
+
+notify_status() {
+    [[ -f "$NOTIFY_SCRIPT" ]] &&
+        systemctl --user is-enabled -q "$NOTIFY_NAME.timer" 2>/dev/null &&
+        systemctl --user is-enabled -q "$NOTIFY_NAME.service" 2>/dev/null
+}
+
+notify_seen() {
+    # Every run records its version: the notifier compares the newest
+    # release with it, so opening Steamify ends a reminder.
+    notify_status && state_set notify seen "$VERSION"
+}
+
+notify_enable() {
+    local p missing=()
+    info "Adding update notifications..."
+    # PySide6 for the tray icon, notify-send for the notification's buttons.
+    python3 -c 'import PySide6.QtWidgets' 2>/dev/null || missing+=(pyside6)
+    command -v notify-send >/dev/null || missing+=(libnotify)
+    if ((${#missing[@]})); then
+        sudo pacman -S --needed --noconfirm "${missing[@]}" ||
+            { err "Installing ${missing[*]} failed."; return 1; }
+    fi
+    patch_file steamify-notifier.py | install_executable "$NOTIFY_SCRIPT" 755 ||
+        { err "Couldn't write $NOTIFY_SCRIPT."; return 1; }
+    mkdir -p "$NOTIFY_UNITS"
+    # PartOf the graphical session: the tray icon goes with a logout. The
+    # short wait at login lets the tray come up first (in the script: an
+    # ExecStartPre sleep runs into the start timeout).
+    cat > "$NOTIFY_UNITS/$NOTIFY_NAME.service" << EOF
+[Unit]
+Description=Steamify: check for a new release
+After=plasma-workspace.target
+PartOf=graphical-session.target
+
+[Service]
+Type=simple
+ExecStart=$NOTIFY_SCRIPT --delay 60
+
+[Install]
+WantedBy=plasma-workspace.target
+EOF
+    cat > "$NOTIFY_UNITS/$NOTIFY_NAME.timer" << EOF
+[Unit]
+Description=Steamify: check for a new release daily
+
+[Timer]
+OnCalendar=daily
+RandomizedDelaySec=1h
+Persistent=true
+
+[Install]
+WantedBy=timers.target
+EOF
+    systemctl --user daemon-reload
+    systemctl --user enable "$NOTIFY_NAME.service" >/dev/null 2>&1 &&
+        systemctl --user enable --now "$NOTIFY_NAME.timer" >/dev/null 2>&1 ||
+        { err "Enabling the update check failed."; return 1; }
+    state_set notify seen "$VERSION"
+    ok "Update notifications on: you'll get a notification when there's a new Steamify."
+}
+
+notify_disable() {
+    systemctl --user disable --now "$NOTIFY_NAME.timer" "$NOTIFY_NAME.service" >/dev/null 2>&1
+    rm -f "$NOTIFY_UNITS/$NOTIFY_NAME.service" "$NOTIFY_UNITS/$NOTIFY_NAME.timer" "$NOTIFY_SCRIPT"
+    rmdir "$NOTIFY_DIR" 2>/dev/null || true
+    systemctl --user daemon-reload
+    state_clear notify
+    ok "Update notifications off."
+}