Implement FindNextOperator

1 files changed, 69 insertions, 0 deletions

diff --git a/src/background/repositories/FindRepository.ts b/src/background/repositories/FindRepository.ts
new file mode 100644
index 0000000..46ee390
--- /dev/null
+++ b/src/background/repositories/FindRepository.ts
@@ -0,0 +1,69 @@
+import { injectable } from "tsyringe";
+import MemoryStorage from "../infrastructures/MemoryStorage";
+
+const FIND_GLOBAL_KEYWORD_KEY = "find-global-keyword";
+const FIND_LOCAL_KEYWORD_KEY = "find-local-keyword";
+
+export type FindState = {
+  keyword: string;
+  framePos: number;
+  frameIds: number[];
+};
+
+export default interface FindRepository {
+  getGlobalKeyword(): Promise<string | undefined>;
+
+  setGlobalKeyword(keyword: string): Promise<void>;
+
+  getLocalState(tabId: number): Promise<undefined | FindState>;
+
+  setLocalState(tabId: number, state: FindState): Promise<void>;
+
+  deleteLocalState(tabId: number): Promise<void>;
+}
+
+@injectable()
+export class FindRepositoryImpl implements FindRepository {
+  private cache: MemoryStorage;
+
+  constructor() {
+    this.cache = new MemoryStorage();
+  }
+
+  getGlobalKeyword(): Promise<string | undefined> {
+    return Promise.resolve(this.cache.get(FIND_GLOBAL_KEYWORD_KEY));
+  }
+
+  setGlobalKeyword(keyword: string): Promise<void> {
+    this.cache.set(FIND_GLOBAL_KEYWORD_KEY, keyword);
+    return Promise.resolve();
+  }
+
+  getLocalState(tabId: number): Promise<FindState | undefined> {
+    let states = this.cache.get(FIND_LOCAL_KEYWORD_KEY);
+    if (typeof states === "undefined") {
+      states = {};
+    }
+    return Promise.resolve(states[tabId]);
+  }
+
+  setLocalState(tabId: number, state: FindState): Promise<void> {
+    let states = this.cache.get(FIND_LOCAL_KEYWORD_KEY);
+    if (typeof states === "undefined") {
+      states = {};
+    }
+    states[tabId] = state;
+    this.cache.set(FIND_LOCAL_KEYWORD_KEY, states);
+    return Promise.resolve();
+  }
+
+  deleteLocalState(tabId: number): Promise<void> {
+    const states = this.cache.get(FIND_LOCAL_KEYWORD_KEY);
+    if (typeof states === "undefined") {
+      return Promise.resolve();
+    }
+    delete states[tabId];
+    this.cache.set(FIND_LOCAL_KEYWORD_KEY, states);
+    return Promise.resolve();
+  }
+}