polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js - gerrit - Git at Google

 // Copyright (C) 2016 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';

   // TODO(davido): Add the rest of the change actions.
   var ChangeActions = {
     ABANDON: 'abandon',
     DELETE: '/',
     RESTORE: 'restore',
     REVERT: 'revert',
   };

   // TODO(andybons): Add the rest of the revision actions.
   var RevisionActions = {
     CHERRYPICK: 'cherrypick',
     DELETE: '/',
     PUBLISH: 'publish',
     REBASE: 'rebase',
     SUBMIT: 'submit',
   };

   var ActionLoadingLabels = {
     'abandon': 'Abandoning...',
     'cherrypick': 'Cherry-Picking...',
     'delete': 'Deleting...',
     'publish': 'Publishing...',
     'rebase': 'Rebasing...',
     'restore': 'Restoring...',
     'revert': 'Reverting...',
     'submit': 'Submitting...',
   };

   var ActionType = {
     CHANGE: 'change',
     REVISION: 'revision',
   };

   var ADDITIONAL_ACTION_KEY_PREFIX = '__additionalAction_';

   Polymer({
     is: 'gr-change-actions',

     /**
      * Fired when the change should be reloaded.
      *
      * @event reload-change
      */

     properties: {
       change: Object,
       actions: {
         type: Object,
         value: function() { return {}; },
       },
       primaryActionKeys: {
         type: Array,
         value: function() {
           return [
             RevisionActions.PUBLISH,
             RevisionActions.SUBMIT,
           ];
         },
       },
       changeNum: String,
       patchNum: String,
       commitMessage: {
         type: String,
         value: '',
       },

       _loading: {
         type: Boolean,
         value: true,
       },
       _revisionActions: {
         type: Object,
         value: function() { return {}; },
       },
       _revisionActionValues: {
         type: Array,
         computed: '_computeRevisionActionValues(_revisionActions.*, ' +
             'primaryActionKeys.*, _additionalActions.*)',
       },
       _changeActionValues: {
         type: Array,
         computed: '_computeChangeActionValues(actions.*, ' +
             'primaryActionKeys.*, _additionalActions.*)',
       },
       _additionalActions: {
         type: Array,
         value: function() { return []; },
       },
       _hiddenChangeActions: {
         type: Array,
         value: function() { return []; },
       },
       _hiddenRevisionActions: {
         type: Array,
         value: function() { return []; },
       },
     },

     ActionType: ActionType,
     ChangeActions: ChangeActions,
     RevisionActions: RevisionActions,

     behaviors: [
       Gerrit.RESTClientBehavior,
     ],

     observers: [
       '_actionsChanged(actions.*, _revisionActions.*, _additionalActions.*)',
     ],

     ready: function() {
       this.$.jsAPI.addElement(this.$.jsAPI.Element.CHANGE_ACTIONS, this);
     },

     reload: function() {
       if (!this.changeNum || !this.patchNum) {
         return Promise.resolve();
       }

       this._loading = true;
       return this._getRevisionActions().then(function(revisionActions) {
         if (!revisionActions) { return; }

         this._revisionActions = revisionActions;
         this._loading = false;
       }.bind(this)).catch(function(err) {
         alert('Couldn’t load revision actions. Check the console ' +
             'and contact the PolyGerrit team for assistance.');
         this._loading = false;
         throw err;
       }.bind(this));
     },

     addActionButton: function(type, label) {
       if (type !== ActionType.CHANGE && type !== ActionType.REVISION) {
         throw Error('Invalid action type: ' + type);
       }
       var action = {
         enabled: true,
         label: label,
         __type: type,
         __key: ADDITIONAL_ACTION_KEY_PREFIX + Math.random().toString(36),
       };
       this.push('_additionalActions', action);
       return action.__key;
     },

     removeActionButton: function(key) {
       var idx = this._indexOfActionButtonWithKey(key);
       if (idx === -1) {
         return;
       }
       this.splice('_additionalActions', idx, 1);
     },

     setActionButtonProp: function(key, prop, value) {
       this.set([
         '_additionalActions',
         this._indexOfActionButtonWithKey(key),
         prop,
       ], value);
     },

     setActionHidden: function(type, key, hidden) {
       var path;
       if (type === ActionType.CHANGE) {
         path = '_hiddenChangeActions';
       } else if (type === ActionType.REVISION) {
         path = '_hiddenRevisionActions';
       } else {
         throw Error('Invalid action type given: ' + type);
       }

       var idx = this.get(path).indexOf(key);
       if (hidden && idx === -1) {
         this.push(path, key);
       } else if (!hidden && idx !== -1) {
         this.splice(path, idx, 1);
       }
     },

     _indexOfActionButtonWithKey: function(key) {
       for (var i = 0; i < this._additionalActions.length; i++) {
         if (this._additionalActions[i].__key === key) {
           return i;
         }
       }
       return -1;
     },

     _getRevisionActions: function() {
       return this.$.restAPI.getChangeRevisionActions(this.changeNum,
           this.patchNum);
     },

     _actionCount: function(actionsChangeRecord, additionalActionsChangeRecord) {
       var additionalActions = (additionalActionsChangeRecord &&
           additionalActionsChangeRecord.base) || [];
       return this._keyCount(actionsChangeRecord) + additionalActions.length;
     },

     _keyCount: function(changeRecord) {
       return Object.keys((changeRecord && changeRecord.base) || {}).length;
     },

     _actionsChanged: function(actionsChangeRecord, revisionActionsChangeRecord,
         additionalActionsChangeRecord) {
       var additionalActions = (additionalActionsChangeRecord &&
           additionalActionsChangeRecord.base) || [];
       this.hidden = this._keyCount(actionsChangeRecord) === 0 &&
           this._keyCount(revisionActionsChangeRecord) === 0 &&
               additionalActions.length === 0;
     },

     _getValuesFor: function(obj) {
       return Object.keys(obj).map(function(key) {
         return obj[key];
       });
     },

     _computeRevisionActionValues: function(actionsChangeRecord,
         primariesChangeRecord, additionalActionsChangeRecord) {
       return this._getActionValues(actionsChangeRecord, primariesChangeRecord,
           additionalActionsChangeRecord, ActionType.REVISION);
     },

     _computeChangeActionValues: function(actionsChangeRecord,
         primariesChangeRecord, additionalActionsChangeRecord) {
       return this._getActionValues(actionsChangeRecord, primariesChangeRecord,
           additionalActionsChangeRecord, ActionType.CHANGE);
     },

     _getActionValues: function(actionsChangeRecord, primariesChangeRecord,
         additionalActionsChangeRecord, type) {
       if (!actionsChangeRecord || !primariesChangeRecord) { return []; }

       var actions = actionsChangeRecord.base || {};
       var primaryActionKeys = primariesChangeRecord.base || [];
       var result = [];
       var values = this._getValuesFor(
           type === ActionType.CHANGE ? ChangeActions : RevisionActions);
       for (var a in actions) {
         if (values.indexOf(a) === -1) { continue; }
         actions[a].__key = a;
         actions[a].__type = type;
         actions[a].__primary = primaryActionKeys.indexOf(a) !== -1;
         if (actions[a].label === 'Delete') {
           // This label is common within change and revision actions. Make it
           // more explicit to the user.
           if (type === ActionType.CHANGE) {
             actions[a].label += ' Change';
           } else if (type === ActionType.REVISION) {
             actions[a].label += ' Revision';
           }
         }
         // Triggers a re-render by ensuring object inequality.
         // TODO(andybons): Polyfill for Object.assign.
         result.push(Object.assign({}, actions[a]));
       }

       var additionalActions = (additionalActionsChangeRecord &&
       additionalActionsChangeRecord.base) || [];
       additionalActions = additionalActions.filter(function(a) {
         return a.__type === type;
       }).map(function(a) {
         a.__primary = primaryActionKeys.indexOf(a.__key) !== -1;
         // Triggers a re-render by ensuring object inequality.
         // TODO(andybons): Polyfill for Object.assign.
         return Object.assign({}, a);
       });
       return result.concat(additionalActions);
     },

     _computeLoadingLabel: function(action) {
       return ActionLoadingLabels[action] || 'Working...';
     },

     _canSubmitChange: function() {
       return this.$.jsAPI.canSubmitChange(this.change,
           this._getRevision(this.change, this.patchNum));
     },

     _computeActionHidden: function(key, hiddenActionsChangeRecord) {
       var hiddenActions =
           (hiddenActionsChangeRecord && hiddenActionsChangeRecord.base) || [];
       return hiddenActions.indexOf(key) !== -1;
     },

     _getRevision: function(change, patchNum) {
       var num = window.parseInt(patchNum, 10);
       for (var hash in change.revisions) {
         var rev = change.revisions[hash];
         if (rev._number === num) {
           return rev;
         }
       }
       return null;
     },

     _modifyRevertMsg: function() {
       return this.$.jsAPI.modifyRevertMsg(this.change,
           this.$.confirmRevertDialog.message, this.commitMessage);
     },

     showRevertDialog: function() {
       this.$.confirmRevertDialog.populateRevertMessage(
           this.commitMessage, this.change.current_revision);
       this.$.confirmRevertDialog.message = this._modifyRevertMsg();
       this._showActionDialog(this.$.confirmRevertDialog);
     },

     _handleActionTap: function(e) {
       e.preventDefault();
       var el = Polymer.dom(e).rootTarget;
       var key = el.getAttribute('data-action-key');
       if (key.indexOf(ADDITIONAL_ACTION_KEY_PREFIX) === 0) {
         this.fire(key + '-tap', {node: el});
         return;
       }
       var type = el.getAttribute('data-action-type');
       if (type === ActionType.REVISION) {
         this._handleRevisionAction(key);
       } else if (key === ChangeActions.REVERT) {
         this.showRevertDialog();
       } else if (key === ChangeActions.ABANDON) {
         this._showActionDialog(this.$.confirmAbandonDialog);
       } else {
         this._fireAction(this._prependSlash(key), this.actions[key], false);
       }
     },

     _handleRevisionAction: function(key) {
       switch (key) {
         case RevisionActions.REBASE:
           this._showActionDialog(this.$.confirmRebase);
           break;
         case RevisionActions.CHERRYPICK:
           this.$.confirmCherrypick.branch = '';
           this._showActionDialog(this.$.confirmCherrypick);
           break;
         case RevisionActions.SUBMIT:
           if (!this._canSubmitChange()) {
             return;
           }
           /* falls through */ // required by JSHint
         default:
           this._fireAction(this._prependSlash(key),
               this._revisionActions[key], true);
       }
     },

     _prependSlash: function(key) {
       return key === '/' ? key : '/' + key;
     },

     _handleConfirmDialogCancel: function() {
       this._hideAllDialogs();
     },

     _hideAllDialogs: function() {
       var dialogEls =
           Polymer.dom(this.root).querySelectorAll('.confirmDialog');
       for (var i = 0; i < dialogEls.length; i++) {
         dialogEls[i].hidden = true;
       }
       this.$.overlay.close();
     },

     _handleRebaseConfirm: function() {
       var payload = {};
       var el = this.$.confirmRebase;
       if (el.clearParent) {
         // There is a subtle but important difference between setting the base
         // to an empty string and omitting it entirely from the payload. An
         // empty string implies that the parent should be cleared and the
         // change should be rebased on top of the target branch. Leaving out
         // the base implies that it should be rebased on top of its current
         // parent.
         payload.base = '';
       } else if (el.base && el.base.length > 0) {
         payload.base = el.base;
       }
       this.$.overlay.close();
       el.hidden = true;
       this._fireAction('/rebase', this._revisionActions.rebase, true, payload);
     },

     _handleCherrypickConfirm: function() {
       var el = this.$.confirmCherrypick;
       if (!el.branch) {
         // TODO(davido): Fix error handling
         alert('The destination branch can’t be empty.');
         return;
       }
       if (!el.message) {
         alert('The commit message can’t be empty.');
         return;
       }
       this.$.overlay.close();
       el.hidden = true;
       this._fireAction(
           '/cherrypick',
           this._revisionActions.cherrypick,
           true,
           {
             destination: el.branch,
             message: el.message,
           }
       );
     },

     _handleRevertDialogConfirm: function() {
       var el = this.$.confirmRevertDialog;
       this.$.overlay.close();
       el.hidden = true;
       this._fireAction('/revert', this.actions.revert, false,
           {message: el.message});
     },

     _handleAbandonDialogConfirm: function() {
       var el = this.$.confirmAbandonDialog;
       this.$.overlay.close();
       el.hidden = true;
       this._fireAction('/abandon', this.actions.abandon, false,
           {message: el.message});
     },

     _setLoadingOnButtonWithKey: function(key) {
       var buttonEl = this.$$('[data-action-key="' + key + '"]');
       buttonEl.setAttribute('loading', true);
       buttonEl.disabled = true;
       return function() {
         buttonEl.removeAttribute('loading');
         buttonEl.disabled = false;
       };
     },

     _fireAction: function(endpoint, action, revAction, opt_payload) {
       var cleanupFn = this._setLoadingOnButtonWithKey(action.__key);

       this._send(action.method, opt_payload, endpoint, revAction, cleanupFn)
           .then(this._handleResponse.bind(this, action));
     },

     _showActionDialog: function(dialog) {
       this._hideAllDialogs();

       dialog.hidden = false;
       this.$.overlay.open().then(function() {
         if (dialog.resetFocus) {
           dialog.resetFocus();
         }
       });
     },

     // TODO(rmistry): Redo this after
     // https://bugs.chromium.org/p/gerrit/issues/detail?id=4671 is resolved.
     _setLabelValuesOnRevert: function(newChangeId) {
       var labels = this.$.jsAPI.getLabelValuesPostRevert(this.change);
       if (labels) {
         var url = '/changes/' + newChangeId + '/revisions/current/review';
         this.$.restAPI.send(this.actions.revert.method, url, {labels: labels});
       }
     },

     _handleResponse: function(action, response) {
       return this.$.restAPI.getResponseObject(response).then(function(obj) {
         switch (action.__key) {
           case ChangeActions.REVERT:
             this._setLabelValuesOnRevert(obj.change_id);
             /* falls through */
           case RevisionActions.CHERRYPICK:
             page.show(this.changePath(obj._number));
             break;
           case ChangeActions.DELETE:
           case RevisionActions.DELETE:
             if (action.__type === ActionType.CHANGE) {
               page.show('/');
             } else {
               page.show(this.changePath(this.changeNum));
             }
             break;
           default:
             this.fire('reload-change', null, {bubbles: false});
             break;
         }
       }.bind(this));
     },

     _handleResponseError: function(response) {
       if (response.ok) { return response; }

       return response.text().then(function(errText) {
         alert('Could not perform action: ' + errText);
         throw Error(errText);
       });
     },

     _send: function(method, payload, actionEndpoint, revisionAction,
         cleanupFn) {
       var url = this.$.restAPI.getChangeActionURL(this.changeNum,
           revisionAction ? this.patchNum : null, actionEndpoint);
       return this.$.restAPI.send(method, url, payload).then(function(response) {
         cleanupFn.call(this);
         return response;
       }.bind(this)).then(this._handleResponseError.bind(this));
     },
   });
 })();
	// Copyright (C) 2016 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';

	// TODO(davido): Add the rest of the change actions.
	var ChangeActions = {
	ABANDON: 'abandon',
	DELETE: '/',
	RESTORE: 'restore',
	REVERT: 'revert',
	};

	// TODO(andybons): Add the rest of the revision actions.
	var RevisionActions = {
	CHERRYPICK: 'cherrypick',
	DELETE: '/',
	PUBLISH: 'publish',
	REBASE: 'rebase',
	SUBMIT: 'submit',
	};

	var ActionLoadingLabels = {
	'abandon': 'Abandoning...',
	'cherrypick': 'Cherry-Picking...',
	'delete': 'Deleting...',
	'publish': 'Publishing...',
	'rebase': 'Rebasing...',
	'restore': 'Restoring...',
	'revert': 'Reverting...',
	'submit': 'Submitting...',
	};

	var ActionType = {
	CHANGE: 'change',
	REVISION: 'revision',
	};

	var ADDITIONAL_ACTION_KEY_PREFIX = '__additionalAction_';

	Polymer({
	is: 'gr-change-actions',

	/**
	* Fired when the change should be reloaded.
	*
	* @event reload-change
	*/

	properties: {
	change: Object,
	actions: {
	type: Object,
	value: function() { return {}; },
	},
	primaryActionKeys: {
	type: Array,
	value: function() {
	return [
	RevisionActions.PUBLISH,
	RevisionActions.SUBMIT,
	];
	},
	},
	changeNum: String,
	patchNum: String,
	commitMessage: {
	type: String,
	value: '',
	},

	_loading: {
	type: Boolean,
	value: true,
	},
	_revisionActions: {
	type: Object,
	value: function() { return {}; },
	},
	_revisionActionValues: {
	type: Array,
	computed: '_computeRevisionActionValues(_revisionActions.*, ' +
	'primaryActionKeys., _additionalActions.)',
	},
	_changeActionValues: {
	type: Array,
	computed: '_computeChangeActionValues(actions.*, ' +
	'primaryActionKeys., _additionalActions.)',
	},
	_additionalActions: {
	type: Array,
	value: function() { return []; },
	},
	_hiddenChangeActions: {
	type: Array,
	value: function() { return []; },
	},
	_hiddenRevisionActions: {
	type: Array,
	value: function() { return []; },
	},
	},

	ActionType: ActionType,
	ChangeActions: ChangeActions,
	RevisionActions: RevisionActions,

	behaviors: [
	Gerrit.RESTClientBehavior,
	],

	observers: [
	'_actionsChanged(actions., _revisionActions., _additionalActions.*)',
	],

	ready: function() {
	this.$.jsAPI.addElement(this.$.jsAPI.Element.CHANGE_ACTIONS, this);
	},

	reload: function() {
	if (!this.changeNum \|\| !this.patchNum) {
	return Promise.resolve();
	}

	this._loading = true;
	return this._getRevisionActions().then(function(revisionActions) {
	if (!revisionActions) { return; }

	this._revisionActions = revisionActions;
	this._loading = false;
	}.bind(this)).catch(function(err) {
	alert('Couldn’t load revision actions. Check the console ' +
	'and contact the PolyGerrit team for assistance.');
	this._loading = false;
	throw err;
	}.bind(this));
	},

	addActionButton: function(type, label) {
	if (type !== ActionType.CHANGE && type !== ActionType.REVISION) {
	throw Error('Invalid action type: ' + type);
	}
	var action = {
	enabled: true,
	label: label,
	__type: type,
	__key: ADDITIONAL_ACTION_KEY_PREFIX + Math.random().toString(36),
	};
	this.push('_additionalActions', action);
	return action.__key;
	},

	removeActionButton: function(key) {
	var idx = this._indexOfActionButtonWithKey(key);
	if (idx === -1) {
	return;
	}
	this.splice('_additionalActions', idx, 1);
	},

	setActionButtonProp: function(key, prop, value) {
	this.set([
	'_additionalActions',
	this._indexOfActionButtonWithKey(key),
	prop,
	], value);
	},

	setActionHidden: function(type, key, hidden) {
	var path;
	if (type === ActionType.CHANGE) {
	path = '_hiddenChangeActions';
	} else if (type === ActionType.REVISION) {
	path = '_hiddenRevisionActions';
	} else {
	throw Error('Invalid action type given: ' + type);
	}

	var idx = this.get(path).indexOf(key);
	if (hidden && idx === -1) {
	this.push(path, key);
	} else if (!hidden && idx !== -1) {
	this.splice(path, idx, 1);
	}
	},

	_indexOfActionButtonWithKey: function(key) {
	for (var i = 0; i < this._additionalActions.length; i++) {
	if (this._additionalActions[i].__key === key) {
	return i;
	}
	}
	return -1;
	},

	_getRevisionActions: function() {
	return this.$.restAPI.getChangeRevisionActions(this.changeNum,
	this.patchNum);
	},

	_actionCount: function(actionsChangeRecord, additionalActionsChangeRecord) {
	var additionalActions = (additionalActionsChangeRecord &&
	additionalActionsChangeRecord.base) \|\| [];
	return this._keyCount(actionsChangeRecord) + additionalActions.length;
	},

	_keyCount: function(changeRecord) {
	return Object.keys((changeRecord && changeRecord.base) \|\| {}).length;
	},

	_actionsChanged: function(actionsChangeRecord, revisionActionsChangeRecord,
	additionalActionsChangeRecord) {
	var additionalActions = (additionalActionsChangeRecord &&
	additionalActionsChangeRecord.base) \|\| [];
	this.hidden = this._keyCount(actionsChangeRecord) === 0 &&
	this._keyCount(revisionActionsChangeRecord) === 0 &&
	additionalActions.length === 0;
	},

	_getValuesFor: function(obj) {
	return Object.keys(obj).map(function(key) {
	return obj[key];
	});
	},

	_computeRevisionActionValues: function(actionsChangeRecord,
	primariesChangeRecord, additionalActionsChangeRecord) {
	return this._getActionValues(actionsChangeRecord, primariesChangeRecord,
	additionalActionsChangeRecord, ActionType.REVISION);
	},

	_computeChangeActionValues: function(actionsChangeRecord,
	primariesChangeRecord, additionalActionsChangeRecord) {
	return this._getActionValues(actionsChangeRecord, primariesChangeRecord,
	additionalActionsChangeRecord, ActionType.CHANGE);
	},

	_getActionValues: function(actionsChangeRecord, primariesChangeRecord,
	additionalActionsChangeRecord, type) {
	if (!actionsChangeRecord \|\| !primariesChangeRecord) { return []; }

	var actions = actionsChangeRecord.base \|\| {};
	var primaryActionKeys = primariesChangeRecord.base \|\| [];
	var result = [];
	var values = this._getValuesFor(
	type === ActionType.CHANGE ? ChangeActions : RevisionActions);
	for (var a in actions) {
	if (values.indexOf(a) === -1) { continue; }
	actions[a].__key = a;
	actions[a].__type = type;
	actions[a].__primary = primaryActionKeys.indexOf(a) !== -1;
	if (actions[a].label === 'Delete') {
	// This label is common within change and revision actions. Make it
	// more explicit to the user.
	if (type === ActionType.CHANGE) {
	actions[a].label += ' Change';
	} else if (type === ActionType.REVISION) {
	actions[a].label += ' Revision';
	}
	}
	// Triggers a re-render by ensuring object inequality.
	// TODO(andybons): Polyfill for Object.assign.
	result.push(Object.assign({}, actions[a]));
	}

	var additionalActions = (additionalActionsChangeRecord &&
	additionalActionsChangeRecord.base) \|\| [];
	additionalActions = additionalActions.filter(function(a) {
	return a.__type === type;
	}).map(function(a) {
	a.__primary = primaryActionKeys.indexOf(a.__key) !== -1;
	// Triggers a re-render by ensuring object inequality.
	// TODO(andybons): Polyfill for Object.assign.
	return Object.assign({}, a);
	});
	return result.concat(additionalActions);
	},

	_computeLoadingLabel: function(action) {
	return ActionLoadingLabels[action] \|\| 'Working...';
	},

	_canSubmitChange: function() {
	return this.$.jsAPI.canSubmitChange(this.change,
	this._getRevision(this.change, this.patchNum));
	},

	_computeActionHidden: function(key, hiddenActionsChangeRecord) {
	var hiddenActions =
	(hiddenActionsChangeRecord && hiddenActionsChangeRecord.base) \|\| [];
	return hiddenActions.indexOf(key) !== -1;
	},

	_getRevision: function(change, patchNum) {
	var num = window.parseInt(patchNum, 10);
	for (var hash in change.revisions) {
	var rev = change.revisions[hash];
	if (rev._number === num) {
	return rev;
	}
	}
	return null;
	},

	_modifyRevertMsg: function() {
	return this.$.jsAPI.modifyRevertMsg(this.change,
	this.$.confirmRevertDialog.message, this.commitMessage);
	},

	showRevertDialog: function() {
	this.$.confirmRevertDialog.populateRevertMessage(
	this.commitMessage, this.change.current_revision);
	this.$.confirmRevertDialog.message = this._modifyRevertMsg();
	this._showActionDialog(this.$.confirmRevertDialog);
	},

	_handleActionTap: function(e) {
	e.preventDefault();
	var el = Polymer.dom(e).rootTarget;
	var key = el.getAttribute('data-action-key');
	if (key.indexOf(ADDITIONAL_ACTION_KEY_PREFIX) === 0) {
	this.fire(key + '-tap', {node: el});
	return;
	}
	var type = el.getAttribute('data-action-type');
	if (type === ActionType.REVISION) {
	this._handleRevisionAction(key);
	} else if (key === ChangeActions.REVERT) {
	this.showRevertDialog();
	} else if (key === ChangeActions.ABANDON) {
	this._showActionDialog(this.$.confirmAbandonDialog);
	} else {
	this._fireAction(this._prependSlash(key), this.actions[key], false);
	}
	},

	_handleRevisionAction: function(key) {
	switch (key) {
	case RevisionActions.REBASE:
	this._showActionDialog(this.$.confirmRebase);
	break;
	case RevisionActions.CHERRYPICK:
	this.$.confirmCherrypick.branch = '';
	this._showActionDialog(this.$.confirmCherrypick);
	break;
	case RevisionActions.SUBMIT:
	if (!this._canSubmitChange()) {
	return;
	}
	/* falls through */ // required by JSHint
	default:
	this._fireAction(this._prependSlash(key),
	this._revisionActions[key], true);
	}
	},

	_prependSlash: function(key) {
	return key === '/' ? key : '/' + key;
	},

	_handleConfirmDialogCancel: function() {
	this._hideAllDialogs();
	},

	_hideAllDialogs: function() {
	var dialogEls =
	Polymer.dom(this.root).querySelectorAll('.confirmDialog');
	for (var i = 0; i < dialogEls.length; i++) {
	dialogEls[i].hidden = true;
	}
	this.$.overlay.close();
	},

	_handleRebaseConfirm: function() {
	var payload = {};
	var el = this.$.confirmRebase;
	if (el.clearParent) {
	// There is a subtle but important difference between setting the base
	// to an empty string and omitting it entirely from the payload. An
	// empty string implies that the parent should be cleared and the
	// change should be rebased on top of the target branch. Leaving out
	// the base implies that it should be rebased on top of its current
	// parent.
	payload.base = '';
	} else if (el.base && el.base.length > 0) {
	payload.base = el.base;
	}
	this.$.overlay.close();
	el.hidden = true;
	this._fireAction('/rebase', this._revisionActions.rebase, true, payload);
	},

	_handleCherrypickConfirm: function() {
	var el = this.$.confirmCherrypick;
	if (!el.branch) {
	// TODO(davido): Fix error handling
	alert('The destination branch can’t be empty.');
	return;
	}
	if (!el.message) {
	alert('The commit message can’t be empty.');
	return;
	}
	this.$.overlay.close();
	el.hidden = true;
	this._fireAction(
	'/cherrypick',
	this._revisionActions.cherrypick,
	true,
	{
	destination: el.branch,
	message: el.message,
	}
	);
	},

	_handleRevertDialogConfirm: function() {
	var el = this.$.confirmRevertDialog;
	this.$.overlay.close();
	el.hidden = true;
	this._fireAction('/revert', this.actions.revert, false,
	{message: el.message});
	},

	_handleAbandonDialogConfirm: function() {
	var el = this.$.confirmAbandonDialog;
	this.$.overlay.close();
	el.hidden = true;
	this._fireAction('/abandon', this.actions.abandon, false,
	{message: el.message});
	},

	_setLoadingOnButtonWithKey: function(key) {
	var buttonEl = this.$$('[data-action-key="' + key + '"]');
	buttonEl.setAttribute('loading', true);
	buttonEl.disabled = true;
	return function() {
	buttonEl.removeAttribute('loading');
	buttonEl.disabled = false;
	};
	},

	_fireAction: function(endpoint, action, revAction, opt_payload) {
	var cleanupFn = this._setLoadingOnButtonWithKey(action.__key);

	this._send(action.method, opt_payload, endpoint, revAction, cleanupFn)
	.then(this._handleResponse.bind(this, action));
	},

	_showActionDialog: function(dialog) {
	this._hideAllDialogs();

	dialog.hidden = false;
	this.$.overlay.open().then(function() {
	if (dialog.resetFocus) {
	dialog.resetFocus();
	}
	});
	},

	// TODO(rmistry): Redo this after
	// https://bugs.chromium.org/p/gerrit/issues/detail?id=4671 is resolved.
	_setLabelValuesOnRevert: function(newChangeId) {
	var labels = this.$.jsAPI.getLabelValuesPostRevert(this.change);
	if (labels) {
	var url = '/changes/' + newChangeId + '/revisions/current/review';
	this.$.restAPI.send(this.actions.revert.method, url, {labels: labels});
	}
	},

	_handleResponse: function(action, response) {
	return this.$.restAPI.getResponseObject(response).then(function(obj) {
	switch (action.__key) {
	case ChangeActions.REVERT:
	this._setLabelValuesOnRevert(obj.change_id);
	/* falls through */
	case RevisionActions.CHERRYPICK:
	page.show(this.changePath(obj._number));
	break;
	case ChangeActions.DELETE:
	case RevisionActions.DELETE:
	if (action.__type === ActionType.CHANGE) {
	page.show('/');
	} else {
	page.show(this.changePath(this.changeNum));
	}
	break;
	default:
	this.fire('reload-change', null, {bubbles: false});
	break;
	}
	}.bind(this));
	},

	_handleResponseError: function(response) {
	if (response.ok) { return response; }

	return response.text().then(function(errText) {
	alert('Could not perform action: ' + errText);
	throw Error(errText);
	});
	},

	_send: function(method, payload, actionEndpoint, revisionAction,
	cleanupFn) {
	var url = this.$.restAPI.getChangeActionURL(this.changeNum,
	revisionAction ? this.patchNum : null, actionEndpoint);
	return this.$.restAPI.send(method, url, payload).then(function(response) {
	cleanupFn.call(this);
	return response;
	}.bind(this)).then(this._handleResponseError.bind(this));
	},
	});
	})();