vp-outstream-player/src/core/utility.ts

Outstream video player with Google IMA integration

declare global {
	interface Window {
		opera: any;
		__vpAdBlocker?: boolean;
		__vpUserInteracted?: boolean;
		Hls?: any;
	}
}

/**
 * Returns a debounced version of `fn` that only fires after `wait` ms
 * have elapsed since the last call.
 */
export function debounce<T extends (...args: any[]) => void>(fn: T, wait: number): T {
	let timeout: ReturnType<typeof setTimeout> | null = null;

	return ((...args: Parameters<T>) => {
		if (timeout !== null) clearTimeout(timeout);
		timeout = setTimeout(() => {
			fn(...args);
			timeout = null;
		}, wait);
	}) as T;
}

/**
 * Turns seconds into "MM:SS" format.
 */
export function formatTime(seconds: number): string {
	const m = Math.floor(seconds / 60)
		.toString()
		.padStart(2, "0");
	const s = Math.floor(seconds % 60)
		.toString()
		.padStart(2, "0");
	return `${m}:${s}`;
}

/**
 * Recursively merge `overrides` into `defaults`, only overriding
 * if types match. Nulls override when `nullCanOverride` is true.
 */
export function mergeConfigs<T extends Record<string, any>>(
	defaults: T,
	overrides: Partial<T>,
	nullCanOverride = false
): void {
	for (const key in defaults) {
		if (!(key in overrides)) continue;
		const ov = overrides[key];
		const df = defaults[key];

		if (ov === null) {
			if (nullCanOverride) defaults[key] = null as any;
			continue;
		}

		if (
			typeof df === "object" &&
			typeof ov === "object" &&
			!Array.isArray(df) &&
			!Array.isArray(ov)
		) {
			mergeConfigs(df, ov as any, nullCanOverride);
		} else if (typeof ov === typeof df) {
			defaults[key] = ov as T[typeof key];
		}
	}
}

/**
 * Loads the HLS.js library if it isn't already on window.Hls.
 * Resolves when the library is loaded, rejects if load fails.
 */
export function loadHLSScript(): Promise<void> {
	return new Promise((resolve, reject) => {
		if (window.Hls) {
			resolve();
			return;
		}

		const script = document.createElement("script");
		script.src = "https://cdn.jsdelivr.net/npm/hls.js@latest";
		script.async = true;

		script.onload = () => {
			if (window.Hls) resolve();
			else reject(new Error("HLS.js loaded but window.Hls missing"));
		};

		script.onerror = () => {
			reject(new Error("Failed to load HLS.js"));
		};

		document.head.appendChild(script);
	});
}

/**
 * Loads the Google IMA SDK if it isn't already on window.google.ima.
 * Resolves when the SDK is present, rejects (and sets __vpAdBlocker)
 * if the network load fails (e.g. blocked by an ad‑blocker).
 */
export function loadIMASDK(): Promise<void> {
	return new Promise((resolve, reject) => {
		if (window.google?.ima) {
			resolve();
			return;
		}

		const script = document.createElement("script");
		script.src = "https://imasdk.googleapis.com/js/sdkloader/ima3.js";
		script.async = true;

		script.onload = () => {
			if (window.google?.ima) resolve();
			else reject(new Error("IMA loaded but window.google.ima missing"));
		};

		script.onerror = () => {
			// Flag ad‑block detected
			window.__vpAdBlocker = true;
			reject(new Error("Failed to load IMA SDK"));
		};

		document.head.appendChild(script);
	});
}

export function isMobile() {
	let check = false;
	(function (a) {
		if (
			/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(
				a
			) ||
			/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(
				a.substr(0, 4)
			)
		)
			check = true;
	})(navigator.userAgent || navigator.vendor || window.opera);
	return check;
}