feat: upload queue

frontend/src/store/modules/upload.js

@@ -1,34 +1,95 @@
 import Vue from 'vue'
+import { files as api } from '@/api'
+import throttle from 'lodash.throttle'
+import buttons from '@/utils/buttons'
+
+const UPLOADS_LIMIT = 5;
 
 const state = {
   id: 0,
-  count: 0,
   size: 0,
-  progress: []
+  progress: [],
+  queue: [],
+  uploads: {}
 }
 
 const mutations = {
-  incrementId: (state) => {
-    state.id = state.id + 1
-  },
-  incrementSize: (state, value) => {
-    state.size = state.size + value
-  },
-  incrementCount: (state) => {
-    state.count = state.count + 1
-  },
-  decreaseCount: (state) => {
-    state.count = state.count - 1
-  },
   setProgress(state, { id, loaded }) {
     Vue.set(state.progress, id, loaded)
   },
   reset: (state) => {
     state.id = 0
     state.size = 0
-    state.count = 0
     state.progress = []
+  },
+  addJob: (state, item) => {
+    state.queue.push(item)
+    state.size += item.file.size
+    state.id++
+  },
+  moveJob(state) {
+    const item = state.queue[0]
+    state.queue.shift()
+    Vue.set(state.uploads, item.id, item)
+  },
+  removeJob(state, id) {
+    delete state.uploads[id]
   }
 }
 
-export default { state, mutations, namespaced: true }
+const actions = {
+  upload: (context, item) => {
+    let uploadsCount = Object.keys(context.state.uploads).length;
+
+    let isQueueEmpty = context.state.queue.length == 0
+    let isUploadsEmpty = uploadsCount == 0
+
+    if (isQueueEmpty && isUploadsEmpty) {
+      buttons.loading('upload')
+    }
+
+    context.commit('addJob', item)
+    context.dispatch('processUploads')
+  },
+  finishUpload: (context, item) => {
+    context.commit('setProgress', { id: item.id, loaded: item.file.size })
+    context.commit('removeJob', item.id)
+    context.dispatch('processUploads')
+  },
+  processUploads: async (context) => {
+    let uploadsCount = Object.keys(context.state.uploads).length;
+
+    let isBellowLimit = uploadsCount < UPLOADS_LIMIT
+    let isQueueEmpty = context.state.queue.length == 0
+    let isUploadsEmpty = uploadsCount == 0
+
+    let isFinished = isQueueEmpty && isUploadsEmpty
+    let canProcess = isBellowLimit && !isQueueEmpty
+
+    if (isFinished) {
+      buttons.success('upload')
+      context.commit('reset')
+      context.commit('setReload', true, { root: true })
+    }
+
+    if (canProcess) {
+      const item = context.state.queue[0];
+      context.commit('moveJob')
+
+      if (item.file.isDir) {
+        await api.post(item.path).catch(Vue.prototype.$showError)
+      } else {
+        let onUpload = throttle(
+          (event) => context.commit('setProgress', { id: item.id, loaded: event.loaded }),
+          100, { leading: true, trailing: false }
+        )
+
+        await api.post(item.path, item.file, item.overwrite, onUpload).catch(Vue.prototype.$showError)
+      }
+
+      context.dispatch('finishUpload', item)
+    }
+  }
+}
+
+export default { state, mutations, actions, namespaced: true }

frontend/src/utils/upload.js

@@ -1,7 +1,4 @@
 import store from '@/store'
-import { files as api } from '@/api'
-import throttle from 'lodash.throttle'
-import buttons from '@/utils/buttons'
 import url from '@/utils/url'
 
 export function checkConflict(files, items) {
@@ -71,6 +68,7 @@ export function scanFiles(dt) {
       } else if (entry.isDirectory) {
         const dir = {
           isDir: true,
+          size: 0,
           path: `${directory}${entry.name}`
         }
 
@@ -102,67 +100,34 @@ export function scanFiles(dt) {
 }
 
 export function handleFiles(files, path, overwrite = false) {
-  if (store.state.upload.count == 0) {
-    buttons.loading('upload')
-  }
-
-  let promises = []
-
-  let onupload = (id) => (event) => {
-    store.commit('upload/setProgress', { id, loaded: event.loaded })
-  }
-
   for (let i = 0; i < files.length; i++) {
     let file = files[i]
 
-    if (!file.isDir) {
-      let filename = (file.fullPath !== undefined) ? file.fullPath : file.name
-      let filenameEncoded = url.encodeRFC5987ValueChars(filename)
+    let filename = (file.fullPath !== undefined) ? file.fullPath : file.name
+    let filenameEncoded = url.encodeRFC5987ValueChars(filename)
 
-      let id = store.state.upload.id
+    let id = store.state.upload.id
 
-      store.commit('upload/incrementSize', file.size)
-      store.commit('upload/incrementId')
-      store.commit('upload/incrementCount')
+    let itemPath = path + filenameEncoded
 
-      let promise = api.post(path + filenameEncoded, file, overwrite, throttle(onupload(id), 100)).finally(() => {
-        store.commit('upload/decreaseCount')
-      })
-
-      promises.push(promise)
-    } else {
-      let uri = path
+    if (file.isDir) {
+      itemPath = path
       let folders = file.path.split("/")
 
       for (let i = 0; i < folders.length; i++) {
         let folder = folders[i]
         let folderEncoded = encodeURIComponent(folder)
-        uri += folderEncoded + "/"
+        itemPath += folderEncoded + "/"
       }
-
-      api.post(uri)
-    }
-  }
-
-  let finish = () => {
-    if (store.state.upload.count > 0) {
-      return
     }
 
-    buttons.success('upload')
+    const item = {
+      id,
+      path: itemPath,
+      file,
+      overwrite
+    }
 
-    store.commit('setReload', true)
-    store.commit('upload/reset')
+    store.dispatch('upload/upload', item);
   }
-
-  Promise.all(promises)
-    .then(() => {
-      finish()
-    })
-    .catch(error => {
-      finish()
-      this.$showError(error)
-    })
-
-  return false
 }