install.sh

#!/bin/sh
# Audio Output Switcher — installer (POSIX sh; works with sh/dash/bash)
# Safe install: JS syntax, JSON and schema are validated FIRST, and only then
# are the files copied, so broken code never reaches the running GNOME Shell.
set -eu

UUID="audio-output-switcher@mehmetnuri.github.io"
EXT_DIR="$HOME/.local/share/gnome-shell/extensions/$UUID"
SCRIPT_DIR="$(cd -- "$(dirname -- "$0")" && pwd)"

say() { printf '==> %s\n' "$1"; }
die() { printf 'ERROR: %s\n' "$1" >&2; exit 1; }

# --- 1. Pre-flight validation --------------------------------------------
say "Validating files"

command -v glib-compile-schemas >/dev/null 2>&1 \
    || die "glib-compile-schemas not found (package: libglib2.0-bin)"

# JSON validation (metadata.json)
if command -v python3 >/dev/null 2>&1; then
    python3 -c "import json,sys; json.load(open(sys.argv[1]))" "$SCRIPT_DIR/metadata.json" \
        || die "metadata.json is not valid JSON"
fi

# JS syntax validation — parses WITHOUT running the code (new Function).
if command -v gjs >/dev/null 2>&1; then
    VALIDATOR="$(mktemp)"
    trap 'rm -f "$VALIDATOR"' EXIT
    cat > "$VALIDATOR" <<'EOF'
const GLib = imports.gi.GLib;
const System = imports.system;
let failed = false;
for (let i = 0; i < ARGV.length; i++) {
    const path = ARGV[i];
    const [ok, bytes] = GLib.file_get_contents(path);
    if (!ok) { printerr(`Cannot read: ${path}`); failed = true; continue; }
    const code = new TextDecoder('utf-8').decode(bytes);
    try {
        // Parse only; imports/gi are not executed.
        new Function(code);
    } catch (e) {
        printerr(`SYNTAX ERROR: ${path}\n  ${e}`);
        failed = true;
    }
}
System.exit(failed ? 1 : 0);
EOF
    gjs "$VALIDATOR" "$SCRIPT_DIR/extension.js" "$SCRIPT_DIR/prefs.js" \
        || die "JS syntax validation failed — install aborted (running shell untouched)"
    say "JS syntax OK"
else
    say "WARNING: gjs missing, JS syntax validation skipped"
fi

# --- 2. Install ----------------------------------------------------------
say "Installing: $UUID"
mkdir -p "$EXT_DIR"

cp -f "$SCRIPT_DIR/metadata.json" "$EXT_DIR/"
cp -f "$SCRIPT_DIR/extension.js"  "$EXT_DIR/"
cp -f "$SCRIPT_DIR/prefs.js"      "$EXT_DIR/"
cp -f "$SCRIPT_DIR/README.md"     "$EXT_DIR/" 2>/dev/null || true

rm -rf "$EXT_DIR/schemas"
cp -r "$SCRIPT_DIR/schemas" "$EXT_DIR/"

# Translations (locale/<lang>/LC_MESSAGES/*.mo)
if [ -d "$SCRIPT_DIR/locale" ]; then
    rm -rf "$EXT_DIR/locale"
    cp -r "$SCRIPT_DIR/locale" "$EXT_DIR/"
fi

say "Compiling schema"
glib-compile-schemas "$EXT_DIR/schemas/" || die "Failed to compile schema"

say "Enabling"
gnome-extensions enable "$UUID" 2>/dev/null \
    || say "Could not enable now (try again after restarting the shell)"

# --- 3. Reload instructions ----------------------------------------------
echo
say "Install complete."
echo
if [ "${XDG_SESSION_TYPE:-}" = "wayland" ]; then
    cat <<'EOF'
    IMPORTANT (Wayland): the running GNOME Shell does not automatically reload
    updated code into memory. To apply the new code, LOG OUT and LOG BACK IN,
    then if needed:
        gnome-extensions enable audio-output-switcher@mehmetnuri.github.io
EOF
else
    cat <<'EOF'
    IMPORTANT (X11/Xorg): the running GNOME Shell does not automatically reload
    updated code into memory. To LOAD the new code, restart GNOME Shell:
        Alt + F2  ->  type  r  ->  Enter
    (Your windows stay open.) Then use the shortcut: Super+Alt+O

    Recovery: if the shell ever freezes, switch to a TTY with Ctrl+Alt+F3 and run
        killall -3 gnome-shell
    to get back to the desktop (no hard power-off required).
EOF
fi