fb-code.js

class FbAllPhotos {
	constructor() {
		this.fbAlbumsPhotosObj = {};
	}

	get fullObj() {
		return this.fbAlbumsPhotosObj
	}

	getAlbums(limitAlbums, winCallback, failCallback) {
		FB.api('/me?fields=albums.limit(' + limitAlbums + '){name,count,cover_photo{picture}}', response => {
			if(response && response.error) { //If response exists and error
				if(typeof failCallback === 'function') failCallback(response.error);
				return;
			} else if(!response || !response.hasOwnProperty('albums')) {
				if(typeof failCallback === 'function') failCallback('noResponse');
				return;
			}

			response.albums.data.forEach(album => {
				album.cover_photo = (album.cover_photo) ? album.cover_photo.picture : ''; //All we need is picture
			});

			this.fbAlbumsPhotosObj = response.albums;

			if(typeof winCallback === 'function') winCallback(this.fbAlbumsPhotosObj);
		});
	}

	getPhotosInAlbum(albumId, limitPics, winCallback, failCallback) {
		const index = this.fbAlbumsPhotosObj.data.findIndex(album => album.id == albumId); //Get index of album. Loose checking due to id as string

		if(index === -1) {
			if(typeof failCallback === 'function') failCallback('noAlbum');
			return;
		}

		FB.api(albumId + '/?fields=photos.limit(' + limitPics + '){picture,images}', response => {
			if(response && response.error) { //If response exists and error
				if(typeof failCallback === 'function') failCallback(response.error);
				return;
			} else if(!response || !response.hasOwnProperty('photos')) {
				if(typeof failCallback === 'function') failCallback('noResponse');
				return;
			}

			response.photos.data.forEach(photo => {
				photo.picture_full = photo.images[0].source; //[0] is the largest image
				delete photo.images; //Only need one full image
			});

			this.fbAlbumsPhotosObj.data[index].photos = response.photos;

			if(typeof winCallback === 'function') winCallback(this.fbAlbumsPhotosObj.data[index].photos);
		});
	}

	async getMoreAlbums(winCallback, failCallback) {
		if(!this.fbAlbumsPhotosObj.paging.hasOwnProperty('next')) { //If there are no more albums
			if(typeof failCallback === 'function') failCallback('noMore');
			return;
		}

		try {
			let response = await fetch(this.fbAlbumsPhotosObj.paging.next);
			if(!response.ok) throw new Error('Server error');
			response = await response.json();

			response.data.forEach(album => {
				album.cover_photo = (album.cover_photo) ? album.cover_photo.picture : ''; //All we need is picture
			});

			this.fbAlbumsPhotosObj.data.push(...response.data); //Append albums
			this.fbAlbumsPhotosObj.paging = response.paging; //Set paging to new values

			if(typeof winCallback === 'function') winCallback(this.fbAlbumsPhotosObj);
		} catch(error) {
			if(typeof failCallback === 'function') failCallback(error);
			return;
		}
	}

	async getMorePhotosInAlbum(albumId, winCallback, failCallback) {
		const index = this.fbAlbumsPhotosObj.data.findIndex(album => album.id == albumId); //Get index of album. //Get index of album. Loose checking due to id as string

		if(index === -1) { //If there are no more albums
			if(typeof failCallback === 'function') failCallback('noAlbum');
			return;
		} else if(!this.fbAlbumsPhotosObj.data[index].photos.paging.hasOwnProperty('next')) { //If there are no more albums
			if(typeof failCallback === 'function') failCallback('noMore');
			return;
		}

		try {
			let response = await fetch(this.fbAlbumsPhotosObj.paging.next);
			if(!response.ok) throw new Error('Server error');
			response = await response.json();

			response.data.forEach(photo => {
				photo.picture_full = photo.images[0].source; //[0] is the largest image
				delete photo.images; //Don't need the rest, only one
			});

			this.fbAlbumsPhotosObj.data[index].photos.data.push(...response.data); //Append photos in album
			this.fbAlbumsPhotosObj.data[index].photos.paging = response.paging; //Set paging to new values

			if(typeof winCallback === 'function') winCallback(this.fbAlbumsPhotosObj.data[index].photos);
		} catch(error) {
			if(typeof failCallback === 'function') failCallback(error);
			return;
		}
	}
}