Added function that generates several posters

domains/Video/Service/handlers/convertFile.js

@@ -10,6 +10,7 @@ const Handlers = require('../../handlers')
 const getPosterImage = require('./getPosterImage')
 const convert = require('./convert')
 const clearTemporaryFiles = require('./clearTemporaryFiles')
+const getSeveralPosters = require('./getSeveralPosters')
 
 const convertFile = async (id, res) => {
   // Extracting request data from storage for this session
@@ -34,12 +35,16 @@ const convertFile = async (id, res) => {
 
     // Moving uploaded file to processing folder
     fileService.moveFileToAnotherFolder(FOLDERS.UPLOAD_DIRECTORY)
-    getPosterImage(
+
+    // Generating posters
+    getSeveralPosters(
       ffmpeg,
       FOLDERS.UPLOAD_DIRECTORY,
       FOLDERS.POSTERS_DIRECTORY,
-      file
+      file,
+      videoDuration
     )
+
     // Converting video using request data
     convert(
       ffmpeg,

domains/Video/Service/handlers/getSeveralPosters.js

@@ -0,0 +1,20 @@
+const getSeveralPosters = (
+  ffmpeg,
+  sourceFolderPath,
+  processedFolderPath,
+  file,
+  videoDuration
+) => {
+  const posterTimemarks = [
+    videoDuration * 0.25,
+    videoDuration * 0.5,
+    videoDuration * 0.75
+  ]
+  return ffmpeg(`${sourceFolderPath}${file.name}`).screenshots({
+    timestamps: posterTimemarks,
+    filename: '%f-poster-%i.png',
+    folder: processedFolderPath
+  })
+}
+
+module.exports = getSeveralPosters

domains/Video/Service/handlers/index.js

@@ -5,6 +5,8 @@ const getVideos = require('./getVideos')
 const convertFile = require('./convertFile')
 const addSubtitles = require('./addSubtitles')
 const uploadWithoutConvert = require('./uploadWithoutConvert')
+const uploadSeveralPosters = require('./uploadSeveralPosters')
+const getSeveralPosters = require('./getSeveralPosters')
 
 module.exports = {
   uploadVideo,
@@ -13,5 +15,7 @@ module.exports = {
   getVideos,
   convertFile,
   addSubtitles,
-  uploadWithoutConvert
+  uploadWithoutConvert,
+  uploadSeveralPosters,
+  getSeveralPosters
 }

domains/Video/Service/handlers/uploadSeveralPosters.js

@@ -0,0 +1,40 @@
+const { FOLDERS } = require('../../../../constants')
+
+const uploadSeveralPosters = async (
+  videoFileName,
+  fileService,
+  appName,
+  appId
+) => {
+  const posterFileNames = [
+    `${videoFileName}-poster-1.png`,
+    `${videoFileName}-poster-2.png`,
+    `${videoFileName}-poster-3.png`
+  ]
+
+  const postersUploadPromises = await Promise.allSettled(
+    posterFileNames.map((posterName) =>
+      fileService.uploadFileToStorage(FOLDERS.POSTERS_DIRECTORY, posterName, {
+        destination: `${appName}_${appId}/posters/${posterName}`
+      })
+    )
+  )
+
+  const posterLinksAndPathsArray = []
+  postersUploadPromises.forEach(({ value }, index) => {
+    posterLinksAndPathsArray.push({
+      link: value.link,
+      path: `${appName}_${appId}/posters/${posterFileNames[index]}`
+    })
+  })
+
+  const postersDeletePromises = await Promise.allSettled(
+    posterFileNames.map((posterName) =>
+      fileService.deleteFileFromFolder(FOLDERS.POSTERS_DIRECTORY, posterName)
+    )
+  )
+
+  return posterLinksAndPathsArray
+}
+
+module.exports = uploadSeveralPosters

domains/Video/handlers/onCovertEnd.handler.js

@@ -1,5 +1,6 @@
 const { COLLECTIONS, FOLDERS } = require('../../../constants')
 const { Storage } = require('../../ServerStorage')
+const uploadSeveralPosters = require('../Service/handlers/uploadSeveralPosters')
 const createGeneralVideoStatisticEntry = require('./createGeneralVideoStatisticEntry')
 
 module.exports = (response, fileService, dbService, storageItem, sessionId) => {
@@ -23,20 +24,14 @@ module.exports = (response, fileService, dbService, storageItem, sessionId) => {
         }
       )
     ).link
-    const posterLink = (
-      await fileService.uploadFileToStorage(
-        FOLDERS.POSTERS_DIRECTORY,
-        `${file.name}-poster.png`,
-        {
-          destination: `${appName}_${appId}/posters/${file.name}-poster.png`
-        }
-      )
-    ).link
 
-    await fileService.deleteFileFromFolder(
-      FOLDERS.POSTERS_DIRECTORY,
-      `${file.name}-poster.png`
+    const posterLinksAndPaths = await uploadSeveralPosters(
+      file.name,
+      fileService,
+      appName,
+      appId
     )
+
     // Adding metadata about video to database collection
     const newDoc = await dbService.createDocument(
       COLLECTIONS.VIDEOS,
@@ -45,8 +40,8 @@ module.exports = (response, fileService, dbService, storageItem, sessionId) => {
         chapters,
         link,
         withSubtitles,
-        posterLink,
-        posterPath: `${appName}_${appId}/posters/${file.name}-poster.png`,
+        posterLink: posterLinksAndPaths[0].link,
+        posterPath: posterLinksAndPaths[0].path,
         path: `${appName}_${appId}/videos/${file.name}.${toFormat}`,
         filename: `${file.name}.${toFormat}`,
         format: `video/${toFormat}`
@@ -72,7 +67,12 @@ module.exports = (response, fileService, dbService, storageItem, sessionId) => {
         videoId: newDoc
       })
     // Sending video link to client and closing SSE channel
-    response.write(`event: videoId\ndata: ${newDoc}\n\n`)
+    response.write(
+      `event: videoId\ndata: ${JSON.stringify({
+        videoId: newDoc,
+        posters: posterLinksAndPaths
+      })}\n\n`
+    )
     response.end()
     // Deleting files from local folders
     if (!withSubtitles) {