From cd808c76dd0583f108f66ce00434cf41ea77503b Mon Sep 17 00:00:00 2001
From: Lakshmi C Rajeev <lakshmi.c.rajeev@sap.com>
Date: Fri, 3 Jan 2020 14:07:17 +0530
Subject: [PATCH] Update media-service.js

---
 packages/media-server/srv/media-service.js | 138 +++++++++------------
 1 file changed, 62 insertions(+), 76 deletions(-)

diff --git a/packages/media-server/srv/media-service.js b/packages/media-server/srv/media-service.js
index 132765ac..f70d3b90 100644
--- a/packages/media-server/srv/media-service.js
+++ b/packages/media-server/srv/media-service.js
@@ -1,82 +1,68 @@
-module.exports = (srv) => {
-    const loki = require('lokijs');
-    const db = new loki('DB');
-    const mediaDB = db.addCollection("Media");
-    const { Readable, PassThrough } = require('stream')
+const loki = require('lokijs')
+const db = new loki('DB')
+const mediaDB = db.addCollection('Media')
+const { Readable, PassThrough } = require('stream')
 
-    srv.before('CREATE', 'Media', (req) => {
-        const obj = mediaDB.insert({ media: "" });
-        req.data.id = obj.$loki;
-    })
+module.exports = srv => {
+  srv.before('CREATE', 'Media', req => {
+    const obj = mediaDB.insert({ media: '' })
+    req.data.id = obj.$loki
+  })
 
-    srv.on('UPDATE', 'Media', (req, next) => {
-        try{ 
-            const url = req._.req.path;
-            if (url.indexOf("content")>0) {
-                const id = req.data.id; 
-                const obj = mediaDB.get(id);
-                if(obj==null) {
-                    req.reject(404,"No record found for the ID");
-                    return;
-                }
-                const stream = new PassThrough();
-                let chunks = [];
-                stream.on('data',  (chunk) => {
-                    chunks.push(chunk);
-                });
-                stream.on('end',  () =>{
-                    obj.media = Buffer.concat(chunks).toString('base64');
-                    mediaDB.update(obj);
-                });
-                req.data.content.pipe(stream);
-            }  else return next()
-        }catch(error){
-            req.reject(404,"Media DB error")
-            console.log(error)
-            return 
-        }
+  srv.on('UPDATE', 'Media', (req, next) => {
+    const url = req._.req.path
+    if (url.includes('content')) {
+      const id = req.data.id
+      const obj = mediaDB.get(id)
+      if (!obj) {
+        req.reject(404, 'No record found for the ID')
+        return
+      }
+      const stream = new PassThrough()
+      const chunks = []
+      stream.on('data', chunk => {
+        chunks.push(chunk)
+      })
+      stream.on('end', () => {
+        obj.media = Buffer.concat(chunks).toString('base64')
+        mediaDB.update(obj)
+      })
+      req.data.content.pipe(stream)
+    } else return next()
+  })
 
-    })
+  srv.on('READ', 'Media', (req, next) => {
+    const url = req._.req.path
+    if (url.includes('content')) {
+      const id = req.data.id
+      const mediaObj = mediaDB.get(id)
+      if (!mediaObj) {
+        req.reject(404, 'Media not found for the ID')
+        return
+      }
+      const decodedMedia = new Buffer(
+        mediaObj.media.split(';base64,').pop(),
+        'base64'
+      )
+      return _formatResult(decodedMedia)
+    } else return next() //> delegate to next/default handlers
+  })
 
-    srv.on("READ", "Media", (req, next) => {
-        try {
-            const url = req._.req.path;
-            if (url.indexOf("content") > 0) {
-                const id = req.data.id;
-                if (mediaDB.get(id) == null) {
-                    req.reject(404, "Media not found for the ID");
-                    return;
-                }
-                const decodedMedia = new Buffer(mediaDB.get(id).media.split(';base64,').pop(), 'base64');
-                return _formatResult(decodedMedia);
-            }
-            else return next()  //> delegate to next/default handlers
-        } catch (error) {
-            req.reject(404, "Media DB error")
-            return
-        }
-    })
-
-    srv.on("DELETE", "Media", (req, next) => {
-        try {
-            const id = req.data.id;
-            const obj = mediaDB.get(id);
-            if (obj != null) {
-                mediaDB.remove(obj)
-            }
-            return next()  //> delegate to next/default handlers
-        } catch (error) {
-            req.reject(404, "Media DB error ")
-        }
-    })
-
-    function _formatResult(decodedMedia) {
-        const readable = new Readable
-        const result = new Array()
-        readable.push(decodedMedia)
-        readable.push(null)
-        result.push({ value: readable })
-        return result
-    }
+  srv.on('DELETE', 'Media', (req, next) => {
+    const id = req.data.id
+    mediaDB
+      .chain()
+      .find({ $loki: id })
+      .remove()
+    return next() //> delegate to next/default handlers
+  })
 
+  function _formatResult (decodedMedia) {
+    const readable = new Readable()
+    const result = new Array()
+    readable.push(decodedMedia)
+    readable.push(null)
+    result.push({ value: readable })
+    return result
+  }
 }