From f6184dcba93fe1a760afbe4ba8d63beeb42ef3d1 Mon Sep 17 00:00:00 2001
From: Alex Buznik <shu@buznik.net>
Date: Wed, 4 Dec 2019 21:55:08 +0200
Subject: [PATCH] Strategies POC

---
 src/content/Control.Strategies.js | 30 ++++++++++++++++++++++++++++++
 src/content/Service.js            | 18 ++++++++++++++++++
 src/content/ServicesRegistry.js   | 27 +++++++++++++++++++++++++++
 src/content/Status.Strategies.js  | 18 ++++++++++++++++++
 src/content/index.js              | 28 +++++++++++++++++++++++++++-
 5 files changed, 120 insertions(+), 1 deletion(-)
 create mode 100644 src/content/Control.Strategies.js
 create mode 100644 src/content/Service.js
 create mode 100644 src/content/ServicesRegistry.js
 create mode 100644 src/content/Status.Strategies.js

diff --git a/src/content/Control.Strategies.js b/src/content/Control.Strategies.js
new file mode 100644
index 0000000..7b53a17
--- /dev/null
+++ b/src/content/Control.Strategies.js
@@ -0,0 +1,30 @@
+
+import { Status } from './Status.Types.js';
+
+export class BaseControlStrategy {
+  static play() {}
+  static pause() {}
+}
+
+export class oneOfTheVideos extends BaseControlStrategy {
+  static getVideosArray() {
+    return Array.from(document.getElementsByTagName('video'));
+  }
+
+  static pause() {
+    oneOfTheVideos.getVideosArray()
+      .filter((player) => !player.paused)
+      .forEach((player) => {
+        player.pause();
+      });
+  }
+
+  static play() {
+    oneOfTheVideos.getVideosArray()
+      .filter((player) => player.paused && player.played.length > 0)
+      .forEach((player) => {
+        player.play();
+      });
+  }
+
+}
diff --git a/src/content/Service.js b/src/content/Service.js
new file mode 100644
index 0000000..1746fcc
--- /dev/null
+++ b/src/content/Service.js
@@ -0,0 +1,18 @@
+/* Base Service class */
+export class Service {
+  constructor(options) {
+    this.options = options;
+  }
+
+  getStatus() {
+    return this.options.statusStrategy.getStatus();
+  }
+
+  play() {
+    this.options.controlStrategy.play();
+  }
+
+  pause() {
+    this.options.controlStrategy.pause();
+  }
+}
diff --git a/src/content/ServicesRegistry.js b/src/content/ServicesRegistry.js
new file mode 100644
index 0000000..1e8c136
--- /dev/null
+++ b/src/content/ServicesRegistry.js
@@ -0,0 +1,27 @@
+import { Service } from './Service.js';
+import * as StatusStrategies from './Status.Strategies.js';
+import * as ControlStrategies from './Control.Strategies.js';
+
+export const servicesRegistry = [
+  {
+    hosts: ['ted.com', 'facebook.com', 'kickstarter.com', 'music.youtube.com' ], // we can add support fields, like `host: string`, `hosts: Array<string>`
+    options: {
+      statusStrategy: StatusStrategies.oneOfTheVideosPlaying,
+      controlStrategy: ControlStrategies.oneOfTheVideos
+    }
+  },
+];
+
+export function getService(domain) {
+  const matchedService = servicesRegistry.find(serviceConfig => {
+    return serviceConfig.host === domain
+      || serviceConfig.hosts.includes(domain)
+      || serviceConfig.hostPattern.match(domain);
+  });
+
+  if (!matchedService) {
+    return;
+  }
+
+  return new Service(matchedService.options);
+}
diff --git a/src/content/Status.Strategies.js b/src/content/Status.Strategies.js
new file mode 100644
index 0000000..51fcedd
--- /dev/null
+++ b/src/content/Status.Strategies.js
@@ -0,0 +1,18 @@
+import { Status } from './Status.Types.js';
+
+export class BaseStatusStrategy {
+  static getStatus() {}
+}
+
+/* A shared mixin for when there is a video tag on page */
+export class oneOfTheVideosPlaying extends BaseStatusStrategy {
+  static getStatus() {
+    let status = Status.PAUSED;
+    const videos = document.getElementsByTagName("video");
+    if (videos.length > 0) {
+      const hasPlayingVideo = Array.from(videos).some((player) => !player.paused);
+      status = hasPlayingVideo ? Status.PLAYING : Status.PAUSED;
+    }
+    return status;
+  }
+}
diff --git a/src/content/index.js b/src/content/index.js
index 057967b..e1b9b47 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -1,6 +1,7 @@
 /* StoPlay Content JS */
 import { CheckTimer } from './CheckTimer.js';
 import { ProviderCheckStatus } from './ProviderCheckStatus.js';
+import { getService } from './ServicesRegistry.js';
 import { Status } from './Status.Types.js';
 
 function safeGetElementTextContentByQuery(query) {
@@ -45,6 +46,7 @@ class Provider {
         this.customLastPauseSelector = null;
 
         this.checkStatus = new ProviderCheckStatus();
+        this.service = null;
 
         chrome.storage.sync.get({
             enabled: true,
@@ -54,7 +56,13 @@ class Provider {
         this.timer = new CheckTimer({
             delay: CHECK_TIMEOUT,
             callback: () => {
-                let status = this.checkStatus.check();
+                let status;
+                if (this.service) {
+                    status = this.service.getStatus();
+                    console.log('service getstatus', status);
+                } else {
+                    status = this.checkStatus.check();
+                }
                 this.__changeState(status);
             },
             recursive: true
@@ -161,6 +169,9 @@ class Provider {
             clearSubDomains = "bandcamp.com";
         }
         if (clearSubDomains) this.host = clearSubDomains;
+
+        this.service = getService(this.host);
+
         return this.host;
     }
 
@@ -277,6 +288,13 @@ class Provider {
         let p, selector, selectorQuery, playerPauseButton;
 
         if (this.status === Status.PLAYING) {
+            if (this.service) {
+                this.service.pause();
+                // #TODO: remove duplication for POC
+                this.__changeState(Status.PAUSED);
+                return;
+            }
+
             switch(this.host) {
                 case "radiolist.com.ua":
                     if (this.customLastPlayerSelector) {
@@ -549,6 +567,14 @@ class Provider {
         let p, selector, selectorQuery, playerPlayButton;
 
         if (this.status !== Status.PLAYING) {
+            if (this.service) {
+                this.service.play();
+                // #TODO: remove duplication for POC
+                this.__changeState(Status.PLAYING);
+                return;
+
+            }
+
             switch(this.host) {
                 case "radiolist.com.ua":
                     if (this.customLastPlayerSelector) {