From 809bdb11f3d213254c098411755631b1264c52f0 Mon Sep 17 00:00:00 2001
From: Shin'ya Ueoka <ueokande@i-beam.org>
Date: Sat, 28 Nov 2020 13:25:47 +0900
Subject: Make operators as a strategy pattern

---
 src/content/operators/impls/addons.ts | 74 +++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/content/operators/impls/addons.ts

(limited to 'src/content/operators/impls/addons.ts')

diff --git a/src/content/operators/impls/addons.ts b/src/content/operators/impls/addons.ts
new file mode 100644
index 0000000..959da43
--- /dev/null
+++ b/src/content/operators/impls/addons.ts
@@ -0,0 +1,74 @@
+import { inject, injectable } from "tsyringe";
+import Operator from "../Operator";
+import OperatorFactoryChain from "../OperatorFactoryChain";
+import AddonIndicatorClient from "../../client/AddonIndicatorClient";
+import AddonEnabledRepository from "../../repositories/AddonEnabledRepository";
+import * as operations from "../../../shared/operations";
+
+export class EnableAddonOperator implements Operator {
+  constructor(
+    private readonly indicator: AddonIndicatorClient,
+    private readonly repository: AddonEnabledRepository
+  ) {}
+
+  async run(): Promise<void> {
+    this.repository.set(true);
+    await this.indicator.setEnabled(true);
+  }
+}
+
+export class DisableAddonOperator implements Operator {
+  constructor(
+    private readonly indicator: AddonIndicatorClient,
+    private readonly repository: AddonEnabledRepository
+  ) {}
+
+  async run(): Promise<void> {
+    this.repository.set(false);
+    await this.indicator.setEnabled(false);
+  }
+}
+
+export class ToggleAddonOperator implements Operator {
+  constructor(
+    private readonly indicator: AddonIndicatorClient,
+    private readonly repository: AddonEnabledRepository
+  ) {}
+
+  async run(): Promise<void> {
+    const current = this.repository.get();
+    this.repository.set(!current);
+    await this.indicator.setEnabled(!current);
+  }
+}
+
+@injectable()
+export class AddonOperatorFactoryChain implements OperatorFactoryChain {
+  constructor(
+    @inject("AddonIndicatorClient")
+    private readonly addonIndicatorClient: AddonIndicatorClient,
+    @inject("AddonEnabledRepository")
+    private readonly addonEnabledRepository: AddonEnabledRepository
+  ) {}
+
+  create(op: operations.Operation, _repeat: number): Operator | null {
+    switch (op.type) {
+      case operations.ADDON_ENABLE:
+        return new EnableAddonOperator(
+          this.addonIndicatorClient,
+          this.addonEnabledRepository
+        );
+      case operations.ADDON_DISABLE:
+        return new DisableAddonOperator(
+          this.addonIndicatorClient,
+          this.addonEnabledRepository
+        );
+      case operations.ADDON_TOGGLE_ENABLED:
+        return new ToggleAddonOperator(
+          this.addonIndicatorClient,
+          this.addonEnabledRepository
+        );
+    }
+    return null;
+  }
+}
-- 
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