Contract Signing and contract printing

front/app/src/common/crud/crud.service.ts

@@ -116,3 +116,28 @@ export class CrudService extends ApiService {
         );
     }
 }
+
+@Injectable()
+export class ImageUploaderCrudService extends CrudService {
+    public upload(resource: string, signature_id: string, image: string) {
+        const formData: FormData = new FormData();
+        formData.append("signature_file", dataURIToBlob(image), signature_id + ".png");
+
+        return this.http.post<{ menu: [{}] }>(
+            `${this.api_root}/${resource.toLowerCase()}/${signature_id}`,
+            formData
+        );
+    }
+}
+
+function dataURIToBlob(dataURI: string) {
+    const splitDataURI = dataURI.split(',')
+    const byteString = splitDataURI[0].indexOf('base64') >= 0 ? atob(splitDataURI[1]) : decodeURI(splitDataURI[1])
+    const mimeString = splitDataURI[0].split(':')[1].split(';')[0]
+
+    const ia = new Uint8Array(byteString.length)
+    for (let i = 0; i < byteString.length; i++)
+        ia[i] = byteString.charCodeAt(i)
+
+    return new Blob([ia], { type: mimeString })
+}