Add chirping when pet

dist/extension/birb.js

@@ -857,6 +857,49 @@
 		}
 	}
 
+	// @ts-check
+
+	class Birdsong {
+
+		/**
+		 * @type {AudioContext}
+		 */
+		audioContext;
+
+		chirp() {
+			if (!this.audioContext) {
+				this.audioContext = new AudioContext();
+			}
+
+			const TIMES = [0, 0.06, 0.16];
+			const FREQUENCIES = [2200,
+				3500 + Math.random() * 700,
+				1600 + Math.random() * 400];
+			const VOLUMES = [0.0001, 0.3, 0.0001];
+
+			const oscillator = this.audioContext.createOscillator();
+			oscillator.type = "sine";
+			const gain = this.audioContext.createGain();
+			oscillator.connect(gain);
+			gain.connect(this.audioContext.destination);
+
+			const now = this.audioContext.currentTime;
+			for (let i = 0; i < TIMES.length; i++) {
+				const time = TIMES[i] + now;
+				if (i === 0) {
+					oscillator.frequency.setValueAtTime(FREQUENCIES[i], time);
+					gain.gain.setValueAtTime(VOLUMES[i], time);
+				} else {
+					oscillator.frequency.exponentialRampToValueAtTime(FREQUENCIES[i], time);
+					gain.gain.exponentialRampToValueAtTime(VOLUMES[i], time);
+				}
+			}
+
+			oscillator.start(now);
+			oscillator.stop(now + TIMES[TIMES.length - 1]);
+		}
+	}
+
 	const SAVE_KEY = "birbSaveData";
 
 	/**
@@ -1819,7 +1862,7 @@
 				insertModal(`${birdBirb()} Mode`, message);
 			}),
 			new Separator(),
-			new MenuItem("2026.1.1", () => { alert("Thank you for using Pocket Bird! You are on version: 2026.1.1"); }, false),
+			new MenuItem("2026.1.4", () => { alert("Thank you for using Pocket Bird! You are on version: 2026.1.4"); }, false),
 		];
 
 		const styleElement = document.createElement("style");
@@ -1833,6 +1876,8 @@
 			FLYING: "flying",
 		};
 
+		const birdsong = new Birdsong();
+
 		let frozen = false;
 		let stateStart = Date.now();
 		let currentState = States.IDLE;
@@ -2513,6 +2558,7 @@
 
 		function pet() {
 			if (currentState === States.IDLE && birb.getCurrentAnimation() !== Animations.HEART) {
+				birdsong.chirp();
 				birb.setAnimation(Animations.HEART);
 				lastPetTimestamp = Date.now();
 			}