From 999417328bde0e60cd59318fc1c18672356254ce Mon Sep 17 00:00:00 2001
From: William Lahti <wilahti@gmail.com>
Date: Tue, 10 Jul 2018 08:47:56 -0700
Subject: Ability to programmatically control embeds (#776)

* first stab at jschannel based player api

* semicolon purge

* more method-level docs; consolidate definitions

* missing definitions

* better match peertube's class conventions

* styling for embed tester

* basic docs

* add `getVolume`

* document the test-embed feature
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 support/doc/api/embeds.md | 122 ++++++++++++++++++++++++++++++++++++++++++++++
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 create mode 100644 support/doc/api/embeds.md

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+# PeerTube Embed API
+
+PeerTube lets you embed videos and programmatically control their playback. This documentation covers how to interact with the PeerTube Embed API.
+
+## Playground
+
+Any PeerTube embed URL (ie `https://my-instance.example.com/videos/embed/52a10666-3a18-4e73-93da-e8d3c12c305a`) can be viewed as an embedding playground which 
+allows you to test various aspects of PeerTube embeds. Simply replace `/embed` with `/test-embed` and visit the URL in a browser. 
+For instance, the playground URL for the above embed URL is `https://my-instance.example.com/videos/test-embed/52a10666-3a18-4e73-93da-e8d3c12c305a`.
+
+## Quick Start
+
+Given an existing PeerTube embed `<iframe>`, one can use the PeerTube Embed API to control it by first including the library. You can include it via Yarn with:
+
+```
+yarn add @peertube/embed-api
+```
+
+Now just use the `PeerTubePlayer` class exported by the module:
+
+```typescript
+import { PeerTubePlayer } from '@peertube/embed-api'
+
+let player = new PeerTubePlayer(document.querySelector('iframe'))
+await player.ready // wait for the player to be ready
+
+// now you can use it!
+player.play()
+player.seek(32)
+player.stop()
+```
+
+# Methods
+
+## `play() : Promise<void>`
+
+Starts playback, or resumes playback if it is paused.
+
+## `pause() : Promise<void>`
+
+Pauses playback.
+
+## `seek(positionInSeconds : number)`
+
+Seek to the given position, as specified in seconds into the video.
+
+## `addEventListener(eventName : string, handler : Function)`
+
+Add a listener for a specific event. See below for the available events.
+
+## `getResolutions() : Promise<PeerTubeResolution[]>`
+
+Get the available resolutions. A `PeerTubeResolution` looks like:
+
+```json
+{
+    "id": 3,
+    "label": "720p",
+    "src": "//src-url-here",
+    "active": true
+}
+```
+
+`active` is true if the resolution is the currently selected resolution.
+
+## `setResolution(resolutionId : number): Promise<void>`
+
+Change the current resolution. Pass `-1` for automatic resolution (when available).
+Otherwise, `resolutionId` should be the ID of an object returned by `getResolutions()`
+
+## `getPlaybackRates() : Promise<number[]>`
+
+Get the available playback rates, where `1` represents normal speed, `0.5` is half speed, `2` is double speed, etc.
+
+## `getPlaybackRates() : Promise<number>`
+
+Get the current playback rate. See `getPlaybackRates()` for more information.
+
+## `setPlaybackRate(rate : number) : Promise<void>`
+
+Set the current playback rate. The passed rate should be a value as returned by `getPlaybackRates()`.
+
+## `setVolume(factor : number) : Promise<void>`
+
+Set the playback volume. Value should be between `0` and `1`.
+
+## `getVolume(): Promise<number>`
+
+Get the playback volume. Returns a value between `0` and `1`.
+# Events
+
+You can subscribe to events by using `addEventListener()`. See above for details.
+
+## Event `play`
+
+Fired when playback begins or is resumed after pausing.
+
+## Event `pause`
+
+Fired when playback is paused.
+
+## Event `playbackStatusUpdate`
+
+Fired every half second to provide the current status of playback. The parameter of the callback will resemble:
+
+```json
+{
+  "position": 22.3,
+  "volume": 0.9,
+  "playbackState": "playing"
+}
+```
+
+The `volume` field contains the volume from `0` (silent) to `1` (full volume). The `playbackState` can be `playing` or `paused`. More states may be added later.
+
+## Event `playbackStatusChange`
+
+Fired when playback transitions between states, such as `pausing` and `playing`. More states may be added later.
+
+## Event `resolutionUpdate`
+
+Fired when the available resolutions have changed, or when the currently selected resolution has changed. Listener should call `getResolutions()` to get the updated information.
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