Copy in-app links as YouTube links

src/main/index.js

@@ -1,6 +1,7 @@
 import {
   app, BrowserWindow, dialog, Menu, ipcMain,
-  powerSaveBlocker, screen, session, shell, nativeTheme, net, protocol
+  powerSaveBlocker, screen, session, shell,
+  nativeTheme, net, protocol, clipboard
 } from 'electron'
 import path from 'path'
 import cp from 'child_process'
@@ -22,6 +23,7 @@ function runApp() {
     showSaveImageAs: true,
     showCopyImageAddress: true,
     showSelectAll: false,
+    showCopyLink: false,
     prepend: (defaultActions, parameters, browserWindow) => [
       {
         label: 'Show / Hide Video Statistics',
@@ -47,7 +49,82 @@ function runApp() {
           browserWindow.webContents.selectAll()
         }
       }
-    ]
+    ],
+    // only show the copy link entry for external links and the /playlist, /channel and /watch in-app URLs
+    // the /playlist, /channel and /watch in-app URLs get transformed to their equivalent YouTube URLs
+    append: (defaultActions, parameters, browserWindow) => {
+      let visible = false
+      const urlParts = parameters.linkURL.split('#')
+      const isInAppUrl = urlParts[0] === browserWindow.webContents.getURL().split('#')[0]
+
+      if (parameters.linkURL.length > 0) {
+        if (isInAppUrl) {
+          const path = urlParts[1]
+
+          if (path) {
+            visible = ['/playlist', '/channel', '/watch'].some(p => path.startsWith(p))
+          }
+        } else {
+          visible = true
+        }
+      }
+
+      return [{
+        label: 'Copy Lin&k',
+        visible: visible,
+        click: () => {
+          let url = parameters.linkURL
+
+          if (isInAppUrl) {
+            const [path, query] = urlParts[1].split('?')
+            const [route, id] = path.split('/').filter(p => p)
+
+            switch (route) {
+              case 'playlist':
+                url = `https://youtube.com/playlist?list=${id}`
+                break
+              case 'channel':
+                url = `https://www.youtube.com/channel/${id}`
+                break
+              case 'watch': {
+                url = `https://youtu.be/${id}`
+
+                if (query) {
+                  const params = new URLSearchParams(query)
+                  const newParams = new URLSearchParams()
+                  let hasParams = false
+
+                  if (params.has('playlistId')) {
+                    newParams.set('list', params.get('playlistId'))
+                    hasParams = true
+                  }
+
+                  if (params.has('timestamp')) {
+                    newParams.set('t', params.get('timestamp'))
+                    hasParams = true
+                  }
+
+                  if (hasParams) {
+                    url += '?' + newParams.toString()
+                  }
+                }
+
+                break
+              }
+            }
+          }
+
+          if (parameters.linkText) {
+            clipboard.write({
+              bookmark: parameters.linkText,
+              text: url
+            })
+          } else {
+            clipboard.writeText(url)
+          }
+        }
+      }]
+    }
   })
 
   // disable electron warning