From 97fcdcce5d1a42c5179caf62c566d63c521968c9 Mon Sep 17 00:00:00 2001
From: Artem Anufrij <artem.anufrij@live.de>
Date: Wed, 27 Sep 2023 16:52:37 +0200
Subject: [PATCH] add get api for random album covers

---
 router/album.js             |  6 ++++++
 services/database/albums.js | 27 ++++++++++++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/router/album.js b/router/album.js
index 4d97485..d46f930 100644
--- a/router/album.js
+++ b/router/album.js
@@ -51,6 +51,12 @@ router.route("/filter/:term")
       res.json(result).status(200).end();
     });
   })
+router.route("/random/:count")
+  .get(passport.authenticate("jwt", { session: false }), (req, res) => {
+    database.albums.randomCovers(req.params.count, 64, (result) => {
+      res.json(result).status(200).end();
+    });
+  })
 
 router.route("/:id")
   .get(checkGuest, (req, res) => {
diff --git a/services/database/albums.js b/services/database/albums.js
index 09c9e43..e8258cb 100644
--- a/services/database/albums.js
+++ b/services/database/albums.js
@@ -310,4 +310,29 @@ exports.empty = function (callback) {
     .toArray((err, result) => {
       callback(result.filter(f => !f.tracks || f.tracks.length == 0));
     });
-};
\ No newline at end of file
+};
+
+exports.randomCovers = function (count, size, callback) {
+  dbo
+    .collection("albums")
+    .find({ "covers.cover64": { $exists: true } })
+    .project({ "covers.cover64": true })
+    .toArray((err, result) => {
+      let res = [];
+      if (result.length > count) {
+        let i = 0;
+        while (i < count) {
+          let rnd = randomNumber(0, result.length);
+          res.push(result[rnd]);
+          i++;
+        }
+        callback(res);
+      } else {
+        callback(result);
+      }
+    })
+}
+
+function randomNumber(min, max) {
+  return Math.floor(Math.random() * (max - min) + min);
+}
\ No newline at end of file