1 files changed, 56 insertions, 0 deletions
diff --git a/src/background/usecases/StartFindUseCase.ts b/src/background/usecases/StartFindUseCase.ts
new file mode 100644
index 0000000..6aad962
--- /dev/null
+++ b/src/background/usecases/StartFindUseCase.ts
@@ -0,0 +1,56 @@
+import { inject, injectable } from "tsyringe";
+import ConsoleClient from "../infrastructures/ConsoleClient";
+import FindRepositoryImpl from "../repositories/FindRepository";
+import FindClient from "../clients/FindClient";
+import ReadyFrameRepository from "../repositories/ReadyFrameRepository";
+
+@injectable()
+export default class StartFindUseCase {
+  constructor(
+    @inject("FindClient")
+    private readonly findClient: FindClient,
+    @inject("FindRepository")
+    private readonly findRepository: FindRepositoryImpl,
+    @inject("ConsoleClient")
+    private readonly consoleClient: ConsoleClient,
+    @inject("ReadyFrameRepository")
+    private readonly frameRepository: ReadyFrameRepository
+  ) {}
+
+  async startFind(tabId: number, keyword?: string): Promise<void> {
+    if (typeof keyword === "undefined") {
+      keyword = (await this.findRepository.getLocalState(tabId))?.keyword;
+    }
+    if (typeof keyword === "undefined") {
+      keyword = await this.findRepository.getGlobalKeyword();
+    }
+    if (typeof keyword === "undefined") {
+      await this.consoleClient.showError(tabId, "No previous search keywords");
+      return;
+    }
+
+    this.findRepository.setGlobalKeyword(keyword);
+
+    const frameIds = await this.frameRepository.getFrameIds(tabId);
+    if (typeof frameIds === "undefined") {
+      // No frames are ready
+      return;
+    }
+    for (const frameId of frameIds) {
+      await this.findClient.clearSelection(tabId, frameId);
+    }
+
+    for (const frameId of frameIds) {
+      const found = await this.findClient.findNext(tabId, frameId, keyword);
+      if (found) {
+        await this.findRepository.setLocalState(tabId, {
+          frameId,
+          keyword,
+        });
+        await this.consoleClient.showInfo(tabId, "Pattern found: " + keyword);
+        return;
+      }
+    }
+    this.consoleClient.showError(tabId, "Pattern not found: " + keyword);
+  }
+}