Added funct for specifing a tag for random/image.

api/v1/routes/ImageRandomGET.js

@@ -8,21 +8,53 @@ class ImageRandomGET {
 
 		this.rateLimiter = new RateLimiter({ max: 5 }); // 5/10
 
+		// NOTE: This is for backwards-compatibilitity
 		this.router.get(
 			this.path,
 			this.rateLimiter.limit.bind(this.rateLimiter),
 			this.run.bind(this)
 		);
+
+		this.router.post(
+			this.path,
+			this.rateLimiter.limit.bind(this.rateLimiter),
+			this.run.bind(this)
+		);
 	}
 
 	async run(req, res) {
-		let agg = this.database.Image.aggregate().cursor({ });
-		if (req.query.nsfw !== undefined)
-			agg.match({ nsfw: req.query.nsfw == 'true' });
+		const body = req.body || req.query;		
+
+		const agg = this.database.Image.aggregate().cursor({ });
+
+		const options = { };
+
+		if (body.nsfw !== undefined)
+			options.nsfw = body.nsfw === 'true' || body.nsfw === true;
+
+		if (Array.isArray(body.tags))
+			body.tags = body.tags.join(', ');
+
+		if (body.tags !== undefined && typeof body.tags === 'string' && body.tags.trim() !== '') {
+			/* What we are doing here is bypassing a mongodb $text restriction.
+			 * If you only include negate expressions then nothing will match so
+			 * we turn it into a $not regex that matches negated tags and returns
+			 * the rest. This is needed for tag blacklists.
+			*/
+			if (body.tags.split(/-"?[^",]+"?(?:, *)?/).join('').trim() === '') {
+				options.tags = {
+					$nin: body.tags.match(/(^|, *)-[^,]+/g).map(e => e.replace(/,? *-|"/g, ''))
+				};
+			} else {
+				options.$text = { $search: body.tags };
+			}
+		}
+
+		agg.match(options);
 
-		if (req.query.count !== undefined && req.query.count != '0' && /^\d{1,3}$/.test(req.query.count)) {
-			let count = parseInt(req.query.count, 10);
-			agg.sample(count <= 100 ? count : 1);
+		if (body.count !== undefined && body.count != 0) {
+			const count = parseInt(body.count, 10);
+			agg.sample(!isNaN(count) && count <= 100 ? count : 1);
 		} else
 			agg.sample(1);