Add JavaScript direct upload support (#81)

1 files changed, 50 insertions, 0 deletions

diff --git a/app/javascript/activestorage/direct_uploads_controller.js b/app/javascript/activestorage/direct_uploads_controller.js
new file mode 100644
index 0000000000..94b89c9119
--- /dev/null
+++ b/app/javascript/activestorage/direct_uploads_controller.js
@@ -0,0 +1,50 @@
+import { DirectUploadController } from "./direct_upload_controller"
+import { findElements, dispatchEvent, toArray } from "./helpers"
+
+const inputSelector = "input[type=file][data-direct-upload-url]:not([disabled])"
+
+export class DirectUploadsController {
+  constructor(form) {
+    this.form = form
+    this.inputs = findElements(form, inputSelector).filter(input => input.files.length)
+  }
+
+  start(callback) {
+    const controllers = this.createDirectUploadControllers()
+
+    const startNextController = () => {
+      const controller = controllers.shift()
+      if (controller) {
+        controller.start(error => {
+          if (error) {
+            callback(error)
+            this.dispatch("end")
+          } else {
+            startNextController()
+          }
+        })
+      } else {
+        callback()
+        this.dispatch("end")
+      }
+    }
+
+    this.dispatch("start")
+    startNextController()
+  }
+
+  createDirectUploadControllers() {
+    const controllers = []
+    this.inputs.forEach(input => {
+      toArray(input.files).forEach(file => {
+        const controller = new DirectUploadController(input, file)
+        controllers.push(controller)
+      })
+    })
+    return controllers
+  }
+
+  dispatch(name, detail = {}) {
+    return dispatchEvent(this.form, `direct-uploads:${name}`, { detail })
+  }
+}