1 files changed, 54 insertions, 0 deletions
diff --git a/activestorage/app/javascript/activestorage/blob_record.js b/activestorage/app/javascript/activestorage/blob_record.js
new file mode 100644
index 0000000000..3c6e6b6ba1
--- /dev/null
+++ b/activestorage/app/javascript/activestorage/blob_record.js
@@ -0,0 +1,54 @@
+import { getMetaValue } from "./helpers"
+
+export class BlobRecord {
+  constructor(file, checksum, url) {
+    this.file = file
+
+    this.attributes = {
+      filename: file.name,
+      content_type: file.type,
+      byte_size: file.size,
+      checksum: checksum
+    }
+
+    this.xhr = new XMLHttpRequest
+    this.xhr.open("POST", url, true)
+    this.xhr.responseType = "json"
+    this.xhr.setRequestHeader("Content-Type", "application/json")
+    this.xhr.setRequestHeader("Accept", "application/json")
+    this.xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest")
+    this.xhr.setRequestHeader("X-CSRF-Token", getMetaValue("csrf-token"))
+    this.xhr.addEventListener("load", event => this.requestDidLoad(event))
+    this.xhr.addEventListener("error", event => this.requestDidError(event))
+  }
+
+  create(callback) {
+    this.callback = callback
+    this.xhr.send(JSON.stringify({ blob: this.attributes }))
+  }
+
+  requestDidLoad(event) {
+    const { status, response } = this.xhr
+    if (status >= 200 && status < 300) {
+      const { direct_upload } = response
+      delete response.direct_upload
+      this.attributes = response
+      this.directUploadData = direct_upload
+      this.callback(null, this.toJSON())
+    } else {
+      this.requestDidError(event)
+    }
+  }
+
+  requestDidError(event) {
+    this.callback(`Error creating Blob for "${this.file.name}". Status: ${this.xhr.status}`)
+  }
+
+  toJSON() {
+    const result = {}
+    for (const key in this.attributes) {
+      result[key] = this.attributes[key]
+    }
+    return result
+  }
+}