Make find as a clean architecture

src/content/actions/find.ts

@@ -1,100 +0,0 @@
-//
-// window.find(aString, aCaseSensitive, aBackwards, aWrapAround,
-//             aWholeWord, aSearchInFrames);
-//
-// NOTE: window.find is not standard API
-// https://developer.mozilla.org/en-US/docs/Web/API/Window/find
-
-import * as messages from '../../shared/messages';
-import * as actions from './index';
-import * as consoleFrames from '../console-frames';
-
-interface MyWindow extends Window {
-  find(
-    aString: string,
-    aCaseSensitive?: boolean,
-    aBackwards?: boolean,
-    aWrapAround?: boolean,
-    aWholeWord?: boolean,
-    aSearchInFrames?: boolean,
-    aShowDialog?: boolean): boolean;
-}
-
-// eslint-disable-next-line no-var, vars-on-top, init-declarations
-declare var window: MyWindow;
-
-const find = (str: string, backwards: boolean): boolean => {
-  let caseSensitive = false;
-  let wrapScan = true;
-
-
-  // NOTE: aWholeWord dows not implemented, and aSearchInFrames does not work
-  // because of same origin policy
-
-  // eslint-disable-next-line no-extra-parens
-  let found = window.find(str, caseSensitive, backwards, wrapScan);
-  if (found) {
-    return found;
-  }
-  let sel = window.getSelection();
-  if (sel) {
-    sel.removeAllRanges();
-  }
-
-  // eslint-disable-next-line no-extra-parens
-  return window.find(str, caseSensitive, backwards, wrapScan);
-};
-
-// eslint-disable-next-line max-statements
-const findNext = async(
-  currentKeyword: string, reset: boolean, backwards: boolean,
-): Promise<actions.FindAction> => {
-  if (reset) {
-    let sel = window.getSelection();
-    if (sel) {
-      sel.removeAllRanges();
-    }
-  }
-
-  let keyword = currentKeyword;
-  if (currentKeyword) {
-    browser.runtime.sendMessage({
-      type: messages.FIND_SET_KEYWORD,
-      keyword: currentKeyword,
-    });
-  } else {
-    keyword = await browser.runtime.sendMessage({
-      type: messages.FIND_GET_KEYWORD,
-    });
-  }
-  if (!keyword) {
-    await consoleFrames.postError('No previous search keywords');
-    return { type: actions.NOOP };
-  }
-  let found = find(keyword, backwards);
-  if (found) {
-    consoleFrames.postInfo('Pattern found: ' + keyword);
-  } else {
-    consoleFrames.postError('Pattern not found: ' + keyword);
-  }
-
-  return {
-    type: actions.FIND_SET_KEYWORD,
-    keyword,
-    found,
-  };
-};
-
-const next = (
-  currentKeyword: string, reset: boolean,
-): Promise<actions.FindAction> => {
-  return findNext(currentKeyword, reset, false);
-};
-
-const prev = (
-  currentKeyword: string, reset: boolean,
-): Promise<actions.FindAction> => {
-  return findNext(currentKeyword, reset, true);
-};
-
-export { next, prev };

src/content/actions/index.ts

@@ -1,9 +1,6 @@
 import Redux from 'redux';
 import * as keyUtils from '../../shared/utils/keys';
 
-// Find
-export const FIND_SET_KEYWORD = 'find.set.keyword';
-
 // User input
 export const INPUT_KEY_PRESS = 'input.key.press';
 export const INPUT_CLEAR_KEYS = 'input.clear.keys';
@@ -27,12 +24,6 @@ export const MARK_SET_LOCAL = 'mark.set.local';
 
 export const NOOP = 'noop';
 
-export interface FindSetKeywordAction extends Redux.Action {
-  type: typeof FIND_SET_KEYWORD;
-  keyword: string;
-  found: boolean;
-}
-
 export interface InputKeyPressAction extends Redux.Action {
   type: typeof INPUT_KEY_PRESS;
   key: keyUtils.Key;
@@ -84,7 +75,6 @@ export interface NoopAction extends Redux.Action {
   type: typeof NOOP;
 }
 
-export type FindAction = FindSetKeywordAction | NoopAction;
 export type InputAction = InputKeyPressAction | InputClearKeysAction;
 export type FollowAction =
   FollowControllerEnableAction | FollowControllerDisableAction |
@@ -94,7 +84,6 @@ export type MarkAction =
   MarkCancelAction | MarkSetLocalAction | NoopAction;
 
 export type Action =
-  FindAction |
   InputAction |
   FollowAction |
   MarkAction |

src/content/client/ConsoleClient.ts

@@ -0,0 +1,30 @@
+import * as messages from '../../shared/messages';
+
+export default interface ConsoleClient {
+  info(text: string): Promise<void>;
+  error(text: string): Promise<void>;
+
+  // eslint-disable-next-line semi
+}
+
+export class ConsoleClientImpl implements ConsoleClient {
+  async info(text: string): Promise<void> {
+    await browser.runtime.sendMessage({
+      type: messages.CONSOLE_FRAME_MESSAGE,
+      message: {
+        type: messages.CONSOLE_SHOW_INFO,
+        text,
+      },
+    });
+  }
+
+  async error(text: string): Promise<void> {
+    await browser.runtime.sendMessage({
+      type: messages.CONSOLE_FRAME_MESSAGE,
+      message: {
+        type: messages.CONSOLE_SHOW_ERROR,
+        text,
+      },
+    });
+  }
+}

src/content/client/FindClient.ts

@@ -0,0 +1,25 @@
+import * as messages from '../../shared/messages';
+
+export default interface FindClient {
+  getGlobalLastKeyword(): Promise<string | null>;
+
+  setGlobalLastKeyword(keyword: string): Promise<void>;
+
+  // eslint-disable-next-line semi
+}
+
+export class FindClientImpl implements FindClient {
+  async getGlobalLastKeyword(): Promise<string | null> {
+    let keyword = await browser.runtime.sendMessage({
+      type: messages.FIND_GET_KEYWORD,
+    });
+    return keyword as string;
+  }
+
+  async setGlobalLastKeyword(keyword: string): Promise<void> {
+    await browser.runtime.sendMessage({
+      type: messages.FIND_SET_KEYWORD,
+      keyword: keyword,
+    });
+  }
+}

src/content/components/top-content/find.ts

@@ -1,13 +1,12 @@
-import * as findActions from '../../actions/find';
 import * as messages from '../../../shared/messages';
 import MessageListener from '../../MessageListener';
 
+import FindUseCase from '../../usecases/FindUseCase';
+
+let findUseCase = new FindUseCase();
+
 export default class FindComponent {
-  private store: any;
-
-  constructor(store: any) {
-    this.store = store;
-
+  constructor() {
     new MessageListener().onWebMessage(this.onMessage.bind(this));
   }
 
@@ -20,27 +19,18 @@ export default class FindComponent {
     case messages.FIND_PREV:
       return this.prev();
     }
+    return Promise.resolve();
   }
 
   start(text: string) {
-    let state = this.store.getState().find;
-
-    if (text.length === 0) {
-      return this.store.dispatch(
-        findActions.next(state.keyword as string, true));
-    }
-    return this.store.dispatch(findActions.next(text, true));
+    return findUseCase.startFind(text.length === 0 ? null : text);
   }
 
   next() {
-    let state = this.store.getState().find;
-    return this.store.dispatch(
-      findActions.next(state.keyword as string, false));
+    return findUseCase.findNext();
   }
 
   prev() {
-    let state = this.store.getState().find;
-    return this.store.dispatch(
-      findActions.prev(state.keyword as string, false));
+    return findUseCase.findPrev();
   }
 }

src/content/components/top-content/index.ts

@@ -17,7 +17,7 @@ export default class TopContent {
 
     new CommonComponent(win, store); // eslint-disable-line no-new
     new FollowController(win, store); // eslint-disable-line no-new
-    new FindComponent(store); // eslint-disable-line no-new
+    new FindComponent(); // eslint-disable-line no-new
 
     // TODO make component
     consoleFrames.initialize(this.win.document);

src/content/presenters/FindPresenter.ts

@@ -0,0 +1,59 @@
+import ConsoleClient, { ConsoleClientImpl } from '../client/ConsoleClient';
+
+export default interface FindPresenter {
+  find(keyword: string, backwards: boolean): boolean;
+
+  clearSelection(): void;
+
+  // eslint-disable-next-line semi
+}
+
+// window.find(aString, aCaseSensitive, aBackwards, aWrapAround,
+//             aWholeWord, aSearchInFrames);
+//
+// NOTE: window.find is not standard API
+// https://developer.mozilla.org/en-US/docs/Web/API/Window/find
+interface MyWindow extends Window {
+  find(
+    aString: string,
+    aCaseSensitive?: boolean,
+    aBackwards?: boolean,
+    aWrapAround?: boolean,
+    aWholeWord?: boolean,
+    aSearchInFrames?: boolean,
+    aShowDialog?: boolean): boolean;
+}
+
+// eslint-disable-next-line no-var, vars-on-top, init-declarations
+declare var window: MyWindow;
+
+export class FindPresenterImpl implements FindPresenter {
+  private consoleClient: ConsoleClient;
+
+  constructor({ consoleClient = new ConsoleClientImpl() } = {}) {
+    this.consoleClient = consoleClient;
+  }
+
+  find(keyword: string, backwards: boolean): boolean {
+    let caseSensitive = false;
+    let wrapScan = true;
+
+
+    // NOTE: aWholeWord dows not implemented, and aSearchInFrames does not work
+    // because of same origin policy
+    let found = window.find(keyword, caseSensitive, backwards, wrapScan);
+    if (found) {
+      return found;
+    }
+    this.clearSelection();
+
+    return window.find(keyword, caseSensitive, backwards, wrapScan);
+  }
+
+  clearSelection(): void {
+    let sel = window.getSelection();
+    if (sel) {
+      sel.removeAllRanges();
+    }
+  }
+}

src/content/reducers/find.ts

@@ -1,25 +0,0 @@
-import * as actions from '../actions';
-
-export interface State {
-  keyword: string | null;
-  found: boolean;
-}
-
-const defaultState: State = {
-  keyword: null,
-  found: false,
-};
-
-export default function reducer(
-  state: State = defaultState,
-  action: actions.FindAction,
-): State {
-  switch (action.type) {
-  case actions.FIND_SET_KEYWORD:
-    return { ...state,
-      keyword: action.keyword,
-      found: action.found, };
-  default:
-    return state;
-  }
-}

src/content/reducers/index.ts

@@ -1,17 +1,15 @@
 import { combineReducers } from 'redux';
-import find, { State as FindState } from './find';
 import input, { State as InputState } from './input';
 import followController, { State as FollowControllerState }
   from './follow-controller';
 import mark, { State as MarkState } from './mark';
 
 export interface State {
-  find: FindState;
   input: InputState;
   followController: FollowControllerState;
   mark: MarkState;
 }
 
 export default combineReducers({
-  find, input, followController, mark,
+  input, followController, mark,
 });

src/content/repositories/FindRepository.ts

@@ -0,0 +1,19 @@
+export default interface FindRepository {
+  getLastKeyword(): string | null;
+
+  setLastKeyword(keyword: string): void;
+
+  // eslint-disable-next-line semi
+}
+
+let current: string | null = null;
+
+export class FindRepositoryImpl implements FindRepository {
+  getLastKeyword(): string | null {
+    return current;
+  }
+
+  setLastKeyword(keyword: string): void {
+    current = keyword;
+  }
+}

src/content/repositories/SettingRepository.ts

@@ -18,5 +18,4 @@ export class SettingRepositoryImpl implements SettingRepository {
   get(): Settings {
     return current;
   }
-
 }

src/content/usecases/FindUseCase.ts

@@ -0,0 +1,81 @@
+import FindPresenter, { FindPresenterImpl } from '../presenters/FindPresenter';
+import FindRepository, { FindRepositoryImpl }
+  from '../repositories/FindRepository';
+import FindClient, { FindClientImpl } from '../client/FindClient';
+import ConsoleClient, { ConsoleClientImpl } from '../client/ConsoleClient';
+
+export default class FindUseCase {
+  private presenter: FindPresenter;
+
+  private repository: FindRepository;
+
+  private client: FindClient;
+
+  private consoleClient: ConsoleClient;
+
+  constructor({
+    presenter = new FindPresenterImpl() as FindPresenter,
+    repository = new FindRepositoryImpl(),
+    client = new FindClientImpl(),
+    consoleClient = new ConsoleClientImpl(),
+  } = {}) {
+    this.presenter = presenter;
+    this.repository = repository;
+    this.client = client;
+    this.consoleClient = consoleClient;
+  }
+
+  async startFind(keyword: string | null): Promise<void> {
+    this.presenter.clearSelection();
+    if (keyword) {
+      this.saveKeyword(keyword);
+    } else {
+      let lastKeyword = await this.getKeyword();
+      if (!lastKeyword) {
+        return this.showNoLastKeywordError();
+      }
+      this.saveKeyword(lastKeyword);
+    }
+    return this.findNext();
+  }
+
+  findNext(): Promise<void> {
+    return this.findNextPrev(false);
+  }
+
+  findPrev(): Promise<void> {
+    return this.findNextPrev(true);
+  }
+
+  private async findNextPrev(
+    backwards: boolean,
+  ): Promise<void> {
+    let keyword = await this.getKeyword();
+    if (!keyword) {
+      return this.showNoLastKeywordError();
+    }
+    let found = this.presenter.find(keyword, backwards);
+    if (found) {
+      this.consoleClient.info('Pattern found: ' + keyword);
+    } else {
+      this.consoleClient.error('Pattern not found: ' + keyword);
+    }
+  }
+
+  private async getKeyword(): Promise<string | null> {
+    let keyword = this.repository.getLastKeyword();
+    if (!keyword) {
+      keyword = await this.client.getGlobalLastKeyword();
+    }
+    return keyword;
+  }
+
+  private async saveKeyword(keyword: string): Promise<void> {
+    this.repository.setLastKeyword(keyword);
+    await this.client.setGlobalLastKeyword(keyword);
+  }
+
+  private async showNoLastKeywordError(): Promise<void> {
+    await this.consoleClient.error('No previous search keywords');
+  }
+}