1 files changed, 121 insertions, 0 deletions
diff --git a/polygerrit-ui/app/elements/change/gr-upload-help-dialog/gr-upload-help-dialog.js b/polygerrit-ui/app/elements/change/gr-upload-help-dialog/gr-upload-help-dialog.js
new file mode 100644
index 0000000000..02d00cf714
--- /dev/null
+++ b/polygerrit-ui/app/elements/change/gr-upload-help-dialog/gr-upload-help-dialog.js
@@ -0,0 +1,121 @@
+/**
+ * @license
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+(function() {
+  'use strict';
+
+  const COMMIT_COMMAND = 'git add . && git commit --amend --no-edit';
+  const PUSH_COMMAND_PREFIX = 'git push origin HEAD:refs/for/';
+
+  // Command names correspond to download plugin definitions.
+  const PREFERRED_FETCH_COMMAND_ORDER = [
+    'checkout',
+    'cherry pick',
+    'pull',
+  ];
+
+  Polymer({
+    is: 'gr-upload-help-dialog',
+
+    /**
+     * Fired when the user presses the close button.
+     *
+     * @event close
+     */
+
+    properties: {
+      revision: Object,
+      targetBranch: String,
+      _commitCommand: {
+        type: String,
+        value: COMMIT_COMMAND,
+        readOnly: true,
+      },
+      _fetchCommand: {
+        type: String,
+        computed: '_computeFetchCommand(revision, ' +
+            '_preferredDownloadCommand, _preferredDownloadScheme)',
+      },
+      _preferredDownloadCommand: String,
+      _preferredDownloadScheme: String,
+      _pushCommand: {
+        type: String,
+        computed: '_computePushCommand(targetBranch)',
+      },
+    },
+
+    attached() {
+      this.$.restAPI.getLoggedIn().then(loggedIn => {
+        if (loggedIn) {
+          return this.$.restAPI.getPreferences();
+        }
+      }).then(prefs => {
+        if (prefs) {
+          this._preferredDownloadCommand = prefs.download_command;
+          this._preferredDownloadScheme = prefs.download_scheme;
+        }
+      });
+    },
+
+    _handleCloseTap(e) {
+      e.preventDefault();
+      this.fire('close', null, {bubbles: false});
+    },
+
+    _computeFetchCommand(revision, preferredDownloadCommand,
+        preferredDownloadScheme) {
+      if (!revision) { return; }
+      if (!revision || !revision.fetch) { return; }
+
+      let scheme = preferredDownloadScheme;
+      if (!scheme) {
+        const keys = Object.keys(revision.fetch).sort();
+        if (keys.length === 0) {
+          return;
+        }
+        scheme = keys[0];
+      }
+
+      if (!revision.fetch[scheme] || !revision.fetch[scheme].commands) {
+        return;
+      }
+
+      const cmds = {};
+      Object.entries(revision.fetch[scheme].commands).forEach(([key, cmd]) => {
+        cmds[key.toLowerCase()] = cmd;
+      });
+
+      if (preferredDownloadCommand &&
+          cmds[preferredDownloadCommand.toLowerCase()]) {
+        return cmds[preferredDownloadCommand.toLowerCase()];
+      }
+
+      // If no supported command preference is given, look for known commands
+      // from the downloads plugin in order of preference.
+      for (let i = 0; i < PREFERRED_FETCH_COMMAND_ORDER.length; i++) {
+        if (cmds[PREFERRED_FETCH_COMMAND_ORDER[i]]) {
+          return cmds[PREFERRED_FETCH_COMMAND_ORDER[i]];
+        }
+      }
+
+      return undefined;
+    },
+
+    _computePushCommand(targetBranch) {
+      return PUSH_COMMAND_PREFIX + targetBranch;
+    },
+  });
+})();