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🐛 fix duplicate posts bug, more intelligent autosave when transitioning (#800)

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- fixes bug where multiple posts were created starting with one char and growing until the new->edit transition completed, e.g. posts with content such as `a`, `ab`, `abcd` were created in quick succession
  - moves old `_savePromise` body into the `save` task
  - call the `save` task instead of the old `_savePromise` so that concurrency is handled properly
- fixes odd behaviour with the "Are you sure you want to leave?" modal appearing too often - it's now aware of on-going or scheduled saves and will wait for those to complete before transitioning
  - move all transition abort/save/retry handling into `toggleLeaveEditorModal` method
  - check for a running save, wait for it to finish then retry the transition
  - check for a scheduled autosave, cancel it if present and perform an immediate autosave then retry the transition
  - don't attempt new->edit transition on successful save of new post if we're already waiting for a different transition
  - once the new->edit transition has completed, if the post body content has changed schedule an autosave manually so that the user doesn't need to type something again to save what they assume is already saved
  - remove debounced slug generation/save on type of title field in favour of generation and save on focus out which plays a lot nicer with the new transition autosave behaviour
This commit is contained in:
Kevin Ansfield 2017-07-22 15:25:00 +01:00 committed by Austin Burdine
parent 9d9d040d7c
commit 7b7c25b5f8
4 changed files with 112 additions and 89 deletions
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148
app/mixins/editor-base-controller.js
View file

@ -1,7 +1,6 @@
import Ember from 'ember';
import Mixin from 'ember-metal/mixin';
import PostModel from 'ghost-admin/models/post';
import RSVP from 'rsvp';
import boundOneWay from 'ghost-admin/utils/bound-one-way';
import computed, {mapBy, reads} from 'ember-computed';
import ghostPaths from 'ghost-admin/utils/ghost-paths';
@ -16,8 +15,6 @@ import {isInvalidError} from 'ember-ajax/errors';
import {isVersionMismatchError} from 'ghost-admin/services/ajax';
import {task, taskGroup, timeout} from 'ember-concurrency';
const {resolve} = RSVP;
// ember-cli-shims doesn't export Ember.testing
const {testing} = Ember;
@ -26,7 +23,6 @@ const {testing} = Ember;
const watchedProps = ['model.scratch', 'model.titleScratch', 'model.hasDirtyAttributes', 'model.tags.[]'];
const DEFAULT_TITLE = '(Untitled)';
const TITLE_DEBOUNCE = testing ? 10 : 700;
// time in ms to save after last content edit
const AUTOSAVE_TIMEOUT = 3000;
@ -67,7 +63,7 @@ export default Mixin.create({
};
},
_canAutosave: computed('model.{isDraft,isNew}', function () {
_canAutosave: computed('model.isDraft', function () {
return !testing && this.get('model.isDraft');
}),
@ -81,7 +77,7 @@ export default Mixin.create({
yield timeout(AUTOSAVE_TIMEOUT);
if (this.get('_canAutosave')) {
yield this.get('autosave').perform();
this.get('autosave').perform();
}
}).restartable(),
@ -92,7 +88,7 @@ export default Mixin.create({
yield timeout(TIMEDSAVE_TIMEOUT);
if (this.get('_canAutosave')) {
yield this.get('autosave').perform();
this.get('autosave').perform();
}
}
}).drop(),
@ -100,13 +96,20 @@ export default Mixin.create({
// separate task for autosave so that it doesn't override a manual save
autosave: task(function* () {
if (!this.get('save.isRunning')) {
return yield this._savePromise({
return yield this.get('save').perform({
silent: true,
backgroundSave: true
});
}
}).drop(),
_autosaveRunning: computed('_autosave.isRunning', '_timedSave.isRunning', function () {
let autosave = this.get('_autosave.isRunning');
let timedsave = this.get('_timedSave.isRunning');
return autosave || timedsave;
}),
// updateSlug and save should always be enqueued so that we don't run into
// problems with concurrency, for example when Cmd-S is pressed whilst the
// cursor is in the slug field - that would previously trigger a simultaneous
@ -116,21 +119,15 @@ export default Mixin.create({
// save tasks cancels autosave before running, although this cancels the
// _xSave tasks that will also cancel the autosave task
save: task(function* (options) {
this.send('cancelAutosave');
return yield this._savePromise(options);
}).group('saveTasks'),
// TODO: convert this into a more ember-concurrency flavour
_savePromise(options) {
save: task(function* (options = {}) {
let prevStatus = this.get('model.status');
let isNew = this.get('model.isNew');
let promise, status;
let status;
options = options || {};
this.send('cancelAutosave');
if (options.backgroundSave && !this.get('hasDirtyAttributes')) {
return RSVP.resolve();
return;
}
if (options.backgroundSave) {
@ -165,29 +162,31 @@ export default Mixin.create({
this.set('model.metaDescription', this.get('model.metaDescriptionScratch'));
if (!this.get('model.slug')) {
this.get('updateTitle').cancelAll();
this.get('saveTitle').cancelAll();
promise = this.get('generateSlug').perform();
yield this.get('generateSlug').perform();
}
return resolve(promise).then(() => {
return this.get('model').save(options).then((model) => {
if (!options.silent) {
this.showSaveNotification(prevStatus, model.get('status'), isNew ? true : false);
}
try {
let model = yield this.get('model').save(options);
this.get('model').set('statusScratch', null);
if (!options.silent) {
this.showSaveNotification(prevStatus, model.get('status'), isNew ? true : false);
}
// redirect to edit route if saving a new record
if (isNew && model.get('id')) {
this.get('model').set('statusScratch', null);
// redirect to edit route if saving a new record
if (isNew && model.get('id')) {
if (!this.get('leaveEditorTransition')) {
this.replaceRoute('editor.edit', model);
return;
}
return true;
}
return model;
});
return model;
}).catch((error) => {
} catch (error) {
// re-throw if we have a general server error
if (error && !isInvalidError(error)) {
this.send('error', error);
@ -197,15 +196,15 @@ export default Mixin.create({
this.set('model.status', prevStatus);
if (!options.silent) {
error = error || this.get('model.errors.messages');
this.showErrorAlert(prevStatus, this.get('model.status'), error);
let errorOrMessages = error || this.get('model.errors.messages');
this.showErrorAlert(prevStatus, this.get('model.status'), errorOrMessages);
// simulate a validation error for upstream tasks
throw undefined;
}
return this.get('model');
});
},
}
}).group('saveTasks'),
/*
* triggered by a user manually changing slug
@ -502,20 +501,28 @@ export default Mixin.create({
notifications.showAlert(message, {type: 'error', delayed: delay, key: 'post.save'});
},
updateTitle: task(function* (newTitle) {
saveTitle: task(function* () {
let model = this.get('model');
let currentTitle = model.get('title');
let newTitle = model.get('titleScratch').trim();
model.set('titleScratch', newTitle);
if (currentTitle && newTitle && newTitle === currentTitle) {
return;
}
// this is necessary to force a save when the title is blank
this.set('hasDirtyAttributes', true);
// generate a slug if a post is new and doesn't have a title yet or
// if the title is still '(Untitled)' and the slug is unaltered.
if ((this.get('model.isNew') && !newTitle) || model.get('title') === DEFAULT_TITLE) {
// debounce for 700 milliseconds
yield timeout(TITLE_DEBOUNCE);
// if the title is still '(Untitled)'
if ((model.get('isNew') && !currentTitle) || currentTitle === DEFAULT_TITLE) {
yield this.get('generateSlug').perform();
}
}).restartable(),
if (this.get('model.isDraft')) {
yield this.get('autosave').perform();
}
}),
generateSlug: task(function* () {
let title = this.get('model.titleScratch');
@ -582,14 +589,36 @@ export default Mixin.create({
},
toggleLeaveEditorModal(transition) {
// cancel autosave when showing the modal to prevent the "leave"
// action failing due to deletion of in-flight records
if (!this.get('showLeaveEditorModal')) {
this.send('cancelAutosave');
let leaveTransition = this.get('leaveEditorTransition');
if (!transition && this.get('showLeaveEditorModal')) {
this.set('showLeaveEditorModal', false);
return;
}
this.set('leaveEditorTransition', transition);
this.toggleProperty('showLeaveEditorModal');
if (!leaveTransition || transition.targetName === leaveTransition.targetName) {
this.set('leaveEditorTransition', transition);
// if a save is running, wait for it to finish then transition
if (this.get('saveTasks.isRunning')) {
return this.get('saveTasks.last').then(() => {
transition.retry();
});
}
// if an autosave is scheduled, cancel it, save then transition
if (this.get('_autosaveRunning')) {
this.send('cancelAutosave');
this.get('autosave').cancelAll();
return this.get('autosave').perform().then(() => {
transition.retry();
});
}
// we genuinely have unsaved data, show the modal
this.set('showLeaveEditorModal', true);
}
},
leaveEditor() {
@ -621,23 +650,8 @@ export default Mixin.create({
return transition.retry();
},
saveTitle() {
let currentTitle = this.get('model.title');
let newTitle = this.get('model.titleScratch').trim();
if (currentTitle && newTitle && newTitle === currentTitle) {
return;
}
// this is necessary to force a save when the title is blank
this.set('hasDirtyAttributes', true);
if (this.get('model.isDraft')) {
this.send('save', {
silent: true,
backgroundSave: true
});
}
updateTitle(newTitle) {
this.set('model.titleScratch', newTitle);
},
toggleDeletePostModal() {

25
app/mixins/editor-base-route.js
View file

@ -46,16 +46,6 @@ export default Mixin.create(styleBody, ShortcutsRoute, {
return this._super(...arguments);
}
// if a save is in-flight we don't know whether or not it's safe to leave
// so we abort the transition and retry after the save has completed.
if (state.isSaving) {
transition.abort();
controller.get('saveTasks.last').then(() => {
transition.retry();
});
return;
}
fromNewToEdit = this.get('routeName') === 'editor.new'
&& transition.targetName === 'editor.edit'
&& transition.intent.contexts
@ -123,6 +113,9 @@ export default Mixin.create(styleBody, ShortcutsRoute, {
model.set('scratch', model.get('mobiledoc'));
model.set('titleScratch', model.get('title'));
// reset the leave editor transition so new->edit will still work
controller.set('leaveEditorTransition', null);
this._super(...arguments);
if (tags) {
@ -132,8 +125,16 @@ export default Mixin.create(styleBody, ShortcutsRoute, {
controller.set('previousTagNames', []);
}
// reset save-on-first-change
controller._hasChanged = false;
// trigger an immediate autosave timeout if model has changed between
// new->edit (typical as first save will only contain the first char)
// so that leaving the route waits for save instead of showing the
// "Are you sure you want to leave?" modal unexpectedly
if (!model.get('isNew') && model.get('hasDirtyAttributes')) {
controller.get('_autosave').perform();
}
// reset save-on-first-change (gh-koenig specific)
// controller._hasChanged = false;
// attach model-related listeners created in editor-base-route
this.attachModelHooks(controller, model);

4
app/templates/editor/edit.hbs
View file

@ -57,8 +57,8 @@
placeholder="Post Title"
tabindex="1"
autoExpand=".gh-markdown-editor-pane"
focusOut=(action "saveTitle")
update=(action (perform updateTitle))
update=(action "updateTitle")
focusOut=(action (perform saveTitle))
keyEvents=(hash
9=(action markdown.focus 'bottom')
13=(action markdown.focus 'top')

24
tests/unit/mixins/editor-base-controller-test.js
View file

@ -72,7 +72,7 @@ describe('Unit: Mixin: editor-base-controller', function() {
});
});
describe('updateTitle', function () {
describe('saveTitle', function () {
it('should invoke generateSlug if the post is new and a title has not been set', function (done) {
let object;
@ -89,8 +89,10 @@ describe('Unit: Mixin: editor-base-controller', function() {
expect(object.get('model.isNew')).to.be.true;
expect(object.get('model.titleScratch')).to.not.be.ok;
object.set('model.titleScratch', 'test');
run(() => {
object.get('updateTitle').perform('test');
object.get('saveTitle').perform();
});
wait().then(() => {
@ -100,12 +102,12 @@ describe('Unit: Mixin: editor-base-controller', function() {
});
});
it('should invoke generateSlug if the post is not new and a title is "(Untitled)"', function (done) {
it('should invoke generateSlug if the post is not new and it\'s title is "(Untitled)"', function (done) {
let object;
run(() => {
object = EmberObject.extend(EditorBaseControllerMixin, {
model: EmberObject.create({isNew: false}),
model: EmberObject.create({isNew: false, title: '(Untitled)'}),
generateSlug: task(function* () {
this.set('model.slug', 'test-slug');
yield RSVP.resolve();
@ -116,12 +118,14 @@ describe('Unit: Mixin: editor-base-controller', function() {
expect(object.get('model.isNew')).to.be.false;
expect(object.get('model.titleScratch')).to.not.be.ok;
object.set('model.titleScratch', 'New Title');
run(() => {
object.get('updateTitle').perform('(Untitled)');
object.get('saveTitle').perform();
});
wait().then(() => {
expect(object.get('model.titleScratch')).to.equal('(Untitled)');
expect(object.get('model.titleScratch')).to.equal('New Title');
expect(object.get('model.slug')).to.equal('test-slug');
done();
});
@ -148,8 +152,10 @@ describe('Unit: Mixin: editor-base-controller', function() {
expect(object.get('model.title')).to.equal('a title');
expect(object.get('model.titleScratch')).to.not.be.ok;
object.set('model.titleScratch', 'test');
run(() => {
object.get('updateTitle').perform('test');
object.get('saveTitle').perform();
});
wait().then(() => {
@ -176,8 +182,10 @@ describe('Unit: Mixin: editor-base-controller', function() {
expect(object.get('model.isNew')).to.be.false;
expect(object.get('model.title')).to.not.be.ok;
object.set('model.titleScratch', 'title');
run(() => {
object.get('updateTitle').perform('title');
object.get('saveTitle').perform();
});
wait().then(() => {