From 7c0a75d950fa2164cb9c0368e542ba8a313cfb54 Mon Sep 17 00:00:00 2001
From: Mirlan <m.maksitaliev@gmail.com>
Date: Thu, 31 Dec 2020 17:43:34 +0600
Subject: [PATCH] Ott 700 play next prev episodes (#271)

* fix(700): fixed useObjectState hook types

* feat(700): added play prev/next episode buttons
---
 .../MultiSourcePlayer/hooks/index.tsx         | 18 ++++-------
 .../hooks/usePlayingHandlers.tsx              | 32 ++++++++++++++++++-
 src/features/MultiSourcePlayer/index.tsx      | 18 ++++++++++-
 src/features/StreamPlayer/styled.tsx          | 12 ++++++-
 src/hooks/useObjectState.tsx                  | 14 ++++----
 5 files changed, 73 insertions(+), 21 deletions(-)

diff --git a/src/features/MultiSourcePlayer/hooks/index.tsx b/src/features/MultiSourcePlayer/hooks/index.tsx
index f8e3a8a1..f5658c32 100644
--- a/src/features/MultiSourcePlayer/hooks/index.tsx
+++ b/src/features/MultiSourcePlayer/hooks/index.tsx
@@ -55,6 +55,7 @@ export const useMultiSourcePlayer = ({
   onProgressChange: onProgressChangeCallback,
   resumeFrom,
 }: Props) => {
+  const numberOfChapters = size(chapters)
   const [
     {
       activeChapterIndex,
@@ -69,10 +70,12 @@ export const useMultiSourcePlayer = ({
   const videoRef = useRef<HTMLVideoElement>(null)
   const {
     onReady,
+    playNextChapter,
+    playPrevChapter,
     startPlaying,
     stopPlaying,
     togglePlaying,
-  } = usePlayingHandlers(setPlayerState)
+  } = usePlayingHandlers(setPlayerState, numberOfChapters)
 
   const {
     selectedQuality,
@@ -105,16 +108,6 @@ export const useMultiSourcePlayer = ({
     setSelectedQuality(quality)
   }
 
-  const playNextChapter = useCallback(() => {
-    const nextIndex = (activeChapterIndex + 1) % size(chapters)
-    setPlayerState({
-      activeChapterIndex: nextIndex,
-      loadedProgress: 0,
-      playedProgress: 0,
-      playing: nextIndex !== 0,
-    })
-  }, [activeChapterIndex, chapters, setPlayerState])
-
   const onPlayerClick = (e: MouseEvent<HTMLDivElement>) => {
     if (e.target === videoRef.current) {
       togglePlaying()
@@ -168,6 +161,8 @@ export const useMultiSourcePlayer = ({
     activeSrc: getActiveChapterUrl(),
     chapters,
     duration,
+    isFirstChapterPlaying: activeChapterIndex === 0,
+    isLastChapterPlaying: activeChapterIndex === numberOfChapters - 1,
     loadedProgress,
     onError: handleError,
     onLoadedProgress,
@@ -177,6 +172,7 @@ export const useMultiSourcePlayer = ({
     onQualitySelect,
     onReady,
     playNextChapter,
+    playPrevChapter,
     playedProgress,
     playing,
     seek,
diff --git a/src/features/MultiSourcePlayer/hooks/usePlayingHandlers.tsx b/src/features/MultiSourcePlayer/hooks/usePlayingHandlers.tsx
index 03e377b7..642f7094 100644
--- a/src/features/MultiSourcePlayer/hooks/usePlayingHandlers.tsx
+++ b/src/features/MultiSourcePlayer/hooks/usePlayingHandlers.tsx
@@ -4,7 +4,10 @@ import { SetPartialState } from 'hooks'
 
 import { PlayerState } from '.'
 
-export const usePlayingHandlers = (setPlayerState: SetPartialState<PlayerState>) => {
+export const usePlayingHandlers = (
+  setPlayerState: SetPartialState<PlayerState>,
+  numberOfChapters: number,
+) => {
   const onReady = useCallback(() => {
     setPlayerState((state) => (
       state.ready
@@ -33,8 +36,35 @@ export const usePlayingHandlers = (setPlayerState: SetPartialState<PlayerState>)
     ))
   }, [setPlayerState])
 
+  const playNextChapter = useCallback(() => {
+    setPlayerState((state) => {
+      if (!state.ready) return state
+
+      const isLastChapter = state.activeChapterIndex + 1 === numberOfChapters
+      return {
+        activeChapterIndex: isLastChapter ? 0 : state.activeChapterIndex + 1,
+        loadedProgress: 0,
+        playedProgress: 0,
+        playing: isLastChapter ? false : state.playing,
+      }
+    })
+  }, [numberOfChapters, setPlayerState])
+
+  const playPrevChapter = useCallback(() => {
+    setPlayerState((state) => {
+      if (!state.ready || state.activeChapterIndex === 0) return state
+      return {
+        activeChapterIndex: state.activeChapterIndex - 1,
+        loadedProgress: 0,
+        playedProgress: 0,
+      }
+    })
+  }, [setPlayerState])
+
   return {
     onReady,
+    playNextChapter,
+    playPrevChapter,
     startPlaying,
     stopPlaying,
     togglePlaying,
diff --git a/src/features/MultiSourcePlayer/index.tsx b/src/features/MultiSourcePlayer/index.tsx
index a802f2cd..4c6d5b30 100644
--- a/src/features/MultiSourcePlayer/index.tsx
+++ b/src/features/MultiSourcePlayer/index.tsx
@@ -4,6 +4,8 @@ import {
   Controls,
   PlayStop,
   Fullscreen,
+  Next,
+  Prev,
 } from 'features/StreamPlayer/styled'
 import { VideoPlayer } from 'features/VideoPlayer'
 
@@ -18,7 +20,9 @@ export const MultiSourcePlayer = (props: Props) => {
     activeSrc,
     chapters,
     duration,
+    isFirstChapterPlaying,
     isFullscreen,
+    isLastChapterPlaying,
     loadedProgress,
     muted,
     onError,
@@ -34,6 +38,7 @@ export const MultiSourcePlayer = (props: Props) => {
     playedProgress,
     playing,
     playNextChapter,
+    playPrevChapter,
     seek,
     selectedQuality,
     togglePlaying,
@@ -64,7 +69,18 @@ export const MultiSourcePlayer = (props: Props) => {
         onReady={onReady}
       />
       <Controls>
-        <PlayStop onClick={togglePlaying} playing={playing} />
+        <Prev
+          disabled={isFirstChapterPlaying}
+          onClick={playPrevChapter}
+        />
+        <PlayStop
+          playing={playing}
+          onClick={togglePlaying}
+        />
+        <Next
+          disabled={isLastChapterPlaying}
+          onClick={playNextChapter}
+        />
         <VolumeBar
           value={volumeInPercent}
           muted={muted}
diff --git a/src/features/StreamPlayer/styled.tsx b/src/features/StreamPlayer/styled.tsx
index 1cb067d1..4f646d3e 100644
--- a/src/features/StreamPlayer/styled.tsx
+++ b/src/features/StreamPlayer/styled.tsx
@@ -69,11 +69,21 @@ export const PlayStop = styled(ButtonBase)<PlayStopProps>`
   )};
 `
 
-export const Prev = styled(ButtonBase)`
+type PrevProps = {
+  disabled?: boolean,
+}
+
+export const Prev = styled(ButtonBase)<PrevProps>`
   width: 29px;
   height: 28px;
   margin-right: 19px;
   background-image: url(/images/player-prev.svg);
+
+  ${({ disabled }) => (
+    disabled
+      ? 'opacity: 0.5;'
+      : ''
+  )}
 `
 
 export const Next = styled(Prev)`
diff --git a/src/hooks/useObjectState.tsx b/src/hooks/useObjectState.tsx
index 9e634d89..6b46897e 100644
--- a/src/hooks/useObjectState.tsx
+++ b/src/hooks/useObjectState.tsx
@@ -1,25 +1,25 @@
-import type { Dispatch, SetStateAction } from 'react'
+import type { Dispatch } from 'react'
 import { useCallback, useState } from 'react'
 
 import isFunction from 'lodash/isFunction'
 
-type Updater<T> = (prevState: T) => T
-const isUpdater = <T extends object>(value: any): value is Updater<T> => (
+type Updater<S> = (prevState: S) => Partial<S>
+const isUpdater = <S extends object>(value: any): value is Updater<S> => (
   isFunction(value)
 )
 
 /**
  * Дженерик для создания типа сеттера, получает тип стейта как параметр
  */
-export type SetPartialState<T> = Dispatch<SetStateAction<Partial<T>>>
+export type SetPartialState<S> = Dispatch<Partial<S> | Updater<S>>
 
 /**
  * Хук на основе useState с возможносьтю мержа стейта как в классовых компонентах
  */
-export const useObjectState = <T extends object>(initialState: T) => {
+export const useObjectState = <S extends object>(initialState: S) => {
   const [state, setState] = useState(initialState)
 
-  const setPlayerState: SetPartialState<T> = useCallback((newStateOrUpdater) => {
+  const setPartialState: SetPartialState<S> = useCallback((newStateOrUpdater) => {
     setState((oldState) => {
       const newState = isUpdater(newStateOrUpdater)
         ? newStateOrUpdater(oldState)
@@ -32,5 +32,5 @@ export const useObjectState = <T extends object>(initialState: T) => {
     })
   }, [])
 
-  return [state, setPlayerState] as const
+  return [state, setPartialState] as const
 }