Feature: save lock control via actions

docs/data/data-core-editor.md

@@ -1299,6 +1299,18 @@ Returns whether the post is locked.
 
 Is locked.
 
+### isPostSavingLocked
+
+Returns whether post saving is locked.
+
+*Parameters*
+
+ * state: Global application state.
+
+*Returns*
+
+Is locked.
+
 ### isPostLockTakeover
 
 Returns whether the edition of the post has been taken over.
@@ -1752,4 +1764,20 @@ Returns an action object used in signalling that the user has enabled the publis
 
 ### disablePublishSidebar
 
-Returns an action object used in signalling that the user has disabled the publish sidebar.
+Returns an action object used in signalling that the user has disabled the publish sidebar.
+
+### lockPostSaving
+
+Returns an action object used to signal that post saving is locked.
+
+*Parameters*
+
+ * lockName: The lock name.
+
+### unlockPostSaving
+
+Returns an action object used to signal that post saving is unlocked.
+
+*Parameters*
+
+ * lockName: The lock name.

packages/editor/src/components/post-publish-button/index.js

@@ -82,14 +82,15 @@ export default compose( [
 			getEditedPostVisibility,
 			isEditedPostSaveable,
 			isEditedPostPublishable,
+			isPostSavingLocked,
 			getCurrentPost,
 			getCurrentPostType,
 		} = select( 'core/editor' );
 		return {
 			isSaving: forceIsSaving || isSavingPost(),
 			isBeingScheduled: isEditedPostBeingScheduled(),
 			visibility: getEditedPostVisibility(),
-			isSaveable: isEditedPostSaveable(),
+			isSaveable: isEditedPostSaveable() && ! isPostSavingLocked(),
 			isPublishable: forceIsDirty || isEditedPostPublishable(),
 			hasPublishAction: get( getCurrentPost(), [ '_links', 'wp:action-publish' ], false ),
 			postType: getCurrentPostType(),

packages/editor/src/store/actions.js

@@ -788,3 +788,32 @@ export function disablePublishSidebar() {
 		type: 'DISABLE_PUBLISH_SIDEBAR',
 	};
 }
+
+/**
+ * Returns an action object used to signal that post saving is locked.
+ *
+ * @param  {string} lockName The lock name.
+ *
+ * @return {Object} Action object
+ */
+export function lockPostSaving( lockName ) {
+	return {
+		type: 'LOCK_POST_SAVING',
+		lockName,
+	};
+}
+
+/**
+ * Returns an action object used to signal that post saving is unlocked.
+ *
+ * @param  {string} lockName The lock name.
+ *
+ * @return {Object} Action object
+ */
+export function unlockPostSaving( lockName ) {
+	return {
+		type: 'UNLOCK_POST_SAVING',
+		lockName,
+	};
+}
+

packages/editor/src/store/reducer.js

@@ -913,6 +913,27 @@ export function postLock( state = { isLocked: false }, action ) {
 	return state;
 }
 
+/**
+ * Post saving lock.
+ *
+ * When post saving is locked, the post cannot be published or updated.
+ *
+ * @param {PostSavingLockState} state  Current state.
+ * @param {Object}              action Dispatched action.
+ *
+ * @return {PostLockState} Updated state.
+ */
+export function postSavingLock( state = {}, action ) {
+	switch ( action.type ) {
+		case 'LOCK_POST_SAVING':
+			return { ...state, [ action.lockName ]: true };
+
+		case 'UNLOCK_POST_SAVING':
+			return omit( state, action.lockName );
+	}
+	return state;
+}
+
 export const reusableBlocks = combineReducers( {
 	data( state = {}, action ) {
 		switch ( action.type ) {
@@ -1133,4 +1154,5 @@ export default optimist( combineReducers( {
 	autosave,
 	settings,
 	tokens,
+	postSavingLock,
 } ) );

packages/editor/src/store/selectors.js

@@ -1995,6 +1995,17 @@ export function isPostLocked( state ) {
 	return state.postLock.isLocked;
 }
 
+/**
+ * Returns whether post saving is locked.
+ *
+ * @param {Object} state Global application state.
+ *
+ * @return {boolean} Is locked.
+ */
+export function isPostSavingLocked( state ) {
+	return state.postSavingLock.length > 0;
+}
+
 /**
  * Returns whether the edition of the post has been taken over.
  *

packages/editor/src/store/test/reducer.js

@@ -35,6 +35,7 @@ import {
 	template,
 	blockListSettings,
 	autosave,
+	postSavingLock,
 } from '../reducer';
 
 describe( 'state', () => {
@@ -2263,4 +2264,49 @@ describe( 'state', () => {
 			} );
 		} );
 	} );
+
+	describe( 'postSavingLock', () => {
+		it( 'returns empty object by default', () => {
+			const state = postSavingLock( undefined, {} );
+
+			expect( state ).toEqual( {} );
+		} );
+
+		it( 'returns correct post locks when locks added and removed', () => {
+			let state = postSavingLock( undefined, {
+				type: 'LOCK_POST_SAVING',
+				lockName: 'test-lock',
+			} );
+
+			expect( state ).toEqual( {
+				'test-lock': true,
+			} );
+
+			state = postSavingLock( deepFreeze( state ), {
+				type: 'LOCK_POST_SAVING',
+				lockName: 'test-lock-2',
+			} );
+
+			expect( state ).toEqual( {
+				'test-lock': true,
+				'test-lock-2': true,
+			} );
+
+			state = postSavingLock( deepFreeze( state ), {
+				type: 'UNLOCK_POST_SAVING',
+				lockName: 'test-lock',
+			} );
+
+			expect( state ).toEqual( {
+				'test-lock-2': true,
+			} );
+
+			state = postSavingLock( deepFreeze( state ), {
+				type: 'UNLOCK_POST_SAVING',
+				lockName: 'test-lock-2',
+			} );
+
+			expect( state ).toEqual( {} );
+		} );
+	} );
 } );

packages/editor/src/store/test/selectors.js

@@ -111,6 +111,7 @@ const {
 	INSERTER_UTILITY_HIGH,
 	INSERTER_UTILITY_MEDIUM,
 	INSERTER_UTILITY_LOW,
+	isPostSavingLocked,
 } = selectors;
 
 describe( 'selectors', () => {
@@ -891,6 +892,28 @@ describe( 'selectors', () => {
 		} );
 	} );
 
+	describe( 'isPostSavingLocked', () => {
+		it( 'should return true if the post has postSavingLocks', () => {
+			const state = {
+				postSavingLock: [ { 1: true } ],
+				currentPost: {},
+				saving: {},
+			};
+
+			expect( isPostSavingLocked( state ) ).toBe( true );
+		} );
+
+		it( 'should return false if the post has no postSavingLocks', () => {
+			const state = {
+				postSavingLock: [],
+				currentPost: {},
+				saving: {},
+			};
+
+			expect( isPostSavingLocked( state ) ).toBe( false );
+		} );
+	} );
+
 	describe( 'isEditedPostSaveable', () => {
 		it( 'should return false if the post has no title, excerpt, content', () => {
 			const state = {