Change add job handling (preparation for api processing)

app/services/views.py

-from app import db
+from app import db, logger
 from app.jobs.forms import AddNLPJobForm, AddOCRJobForm
 from app.models import Job, JobInput
-from flask import abort, current_app, flash, redirect, render_template, url_for
+from flask import (abort, current_app, flash, make_response, render_template,
+                   request, url_for)
 from flask_login import current_user, login_required
 from werkzeug.utils import secure_filename
 from . import services
@@ -23,7 +24,9 @@ def service(service):
     if service not in SERVICES:
         abort(404)
     add_job_form = SERVICES[service]['add_job_form']()
-    if add_job_form.validate_on_submit():
+    if add_job_form.is_submitted():
+        if not add_job_form.validate():
+            return make_response(add_job_form.errors, 400)
         service_args = []
         if service == 'nlp':
             service_args.append('-l {}'.format(add_job_form.language.data))
@@ -46,8 +49,11 @@ def service(service):
         try:
             os.makedirs(absolut_dir)
         except OSError:
-            flash('[ERROR]: Could not add job!')
             job.delete()
+            flash('Internal Server Error')
+            return make_response(
+                {'redirect_url': url_for('services.service', service='ocr')},
+                500)
         else:
             for file in add_job_form.files.data:
                 filename = secure_filename(file.filename)
@@ -58,7 +64,8 @@ def service(service):
             job.status = 'submitted'
             db.session.commit()
             flash('Job added!')
-            return redirect(url_for('jobs.job', job_id=job.id))
+            return make_response(
+                {'redirect_url': url_for('jobs.job', job_id=job.id)}, 201)
     return render_template('services/{}.html.j2'.format(service),
                            title=SERVICES[service]['name'],
                            add_job_form=add_job_form)

app/static/js/add_job.js

@@ -14,9 +14,15 @@ function SubmitAddJobForm(newJobFormElement, progressModalElement, request) {
     progressModalElement.querySelector(".determinate").style.width = progressInPercent;
   });
   request.addEventListener("load", function(event) {
-    console.log(request.response);
-    newJobFormElement.reset();
-    location.reload();
+    if (request.status === 201) {
+      window.location.href = JSON.parse(this.responseText)['redirect_url'];
+    }
+    if (request.status === 400) {
+      console.log(JSON.parse(this.responseText));
+    }
+    if (request.status === 500) {
+      location.reload();
+    }
   });
   request.addEventListener("abort", function(event) {
     progressModalElement.querySelector(".progress-in-percent").innerHTML = "0%";