视频播放记录

app/controllers/watch_video_histories_controller.rb

@@ -0,0 +1,8 @@
+class WatchVideoHistoriesController < ApplicationController
+  before_action :require_login
+
+  def create
+    watch_log = CreateWatchVideoService.new(current_user, request, params).call
+    render_ok(log_id: watch_log&.id)
+  end
+end

app/models/course_video.rb

@@ -5,4 +5,6 @@ class CourseVideo < ApplicationRecord
 
   validates :title, length: { maximum: 60, too_long: "不能超过60个字符" }, allow_blank: true
   validates :link, format: { with: CustomRegexp::URL, message: "必须为网址超链接" }, allow_blank: true
+
+  has_many :watch_course_videos
 end

app/models/user.rb

@@ -162,6 +162,10 @@ class User < ApplicationRecord
 
   has_many :teacher_group_records, dependent: :destroy
 
+  # 视频观看记录
+  has_many :watch_video_histories, dependent: :destroy
+  has_many :watch_course_video, dependent: :destroy
+
   # Groups and active users
   scope :active, lambda { where(status: STATUS_ACTIVE) }
 

app/models/watch_course_video.rb

@@ -0,0 +1,9 @@
+class WatchCourseVideo < ApplicationRecord
+  belongs_to :course_video
+  belongs_to :user
+
+  has_many :watch_video_histories
+
+
+  validates :course_video_id, uniqueness: {scope: :user_id}
+end

app/models/watch_video_history.rb

@@ -0,0 +1,5 @@
+class WatchVideoHistory < ApplicationRecord
+  belongs_to :user
+  belongs_to :video
+  belongs_to :watch_course_video, optional: true
+end

app/services/create_watch_video_service.rb

@@ -0,0 +1,71 @@
+class CreateWatchVideoService < ApplicationService
+  attr_reader :user, :params, :request
+
+  def initialize(user, request, params)
+    @user    = user
+    @request = request
+    @params  = params
+  end
+
+  def call
+    ActiveRecord::Base.transaction do
+      current_time = Time.now
+      if params[:log_id].present?
+        # 更新观看时长
+        watch_video_history = user.watch_video_histories.find(params[:log_id])
+
+        if watch_video_history.present? && watch_video_history.watch_duration < params[:watch_duration].to_f
+          # 如果观看时长少于原有的，说明拖放到前面重新观看了，不必再去记录
+          watch_video_history.end_at = current_time
+          watch_video_history.watch_duration = params[:watch_duration]
+          watch_video_history.is_finished = (watch_video_history.duration <= params[:watch_duration].to_f)
+          watch_video_history.save!
+
+          watch_course_video = watch_video_history.watch_course_video
+
+          if watch_course_video.present? && !watch_course_video.is_finished && watch_course_video.watch_duration < params[:watch_duration].to_f
+            # 更新课程视频的时长及是否看完
+            watch_course_video.watch_duration = params[:watch_duration]
+            watch_course_video.is_finished = (watch_course_video.duration <= params[:watch_duration].to_f)
+            watch_course_video.end_at = current_time
+            watch_course_video.save!
+          end
+        end
+      else
+        # 开始播放时记录一次
+        if params[:course_id].present?
+          # 课堂视频
+          course_video = CourseVideo.find_by(course_id: params[:course_id], video_id: params[:video_id])
+          watch_course_video = WatchCourseVideo.find_or_initialize_by(course_video_id: course_video.id, user_id: user.id) do |d|
+            d.start_at = current_time
+            d.duration = params[:duration]
+          end
+          
+          watch_video_history = build_video_log(current_time, course_video.video_id, watch_course_video.id)
+          watch_video_history.save!
+
+          watch_course_video.save! unless watch_course_video.persisted?
+        else
+          # 非课堂视频
+          video = Video.find_by(params[:video_id])
+          watch_video_history = build_video_log(current_time, video.id)
+          watch_video_history.save!
+        end
+      end
+      watch_video_history
+    end
+  end
+
+
+  def build_video_log(current_time, video_id, watch_course_video_id)
+    WatchVideoHistory.new(
+      user_id: user.id,
+      watch_course_video_id: watch_course_video_id,
+      start_at: current_time,
+      duration: params[:duration],
+      video_id: video_id,
+      device: params[:device],
+      ip: request.remote_ip
+    )
+  end
+end

config/routes.rb

@@ -29,6 +29,8 @@ Rails.application.routes.draw do
     put    'commons/unhidden',    to: 'commons#unhidden'
     delete 'commons/delete',      to: 'commons#delete'
 
+    resources :watch_video_histories, only: [:create]
+
     resources :jupyters do
       collection do
         get :save_with_tpi

db/migrate/20200305072442_create_watch_course_videos.rb

@@ -0,0 +1,15 @@
+class CreateWatchCourseVideos < ActiveRecord::Migration[5.2]
+  def change
+    create_table :watch_course_videos do |t|
+      t.references :course_video, index: true
+      t.references :user, index: true
+      t.boolean :is_finished, default: false
+      t.float :duration, default: 0
+      t.float :watch_duration, default: 0
+      t.datetime :start_at
+      t.datetime :end_at
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20200305074638_create_watch_video_histories.rb

@@ -0,0 +1,18 @@
+class CreateWatchVideoHistories < ActiveRecord::Migration[5.2]
+  def change
+    create_table :watch_video_histories do |t|
+      t.references :watch_course_video, index: true
+      t.references :user, index: true
+      t.references :video, index: true
+      t.boolean :is_finished, default: false
+      t.float :duration, default: 0
+      t.float :watch_duration, default: 0
+      t.datetime :start_at
+      t.datetime :end_at
+      t.string :device
+      t.string :ip
+
+      t.timestamps
+    end
+  end
+end