Add input options for ocr job creation.

app/services/forms.py

 from flask_wtf import FlaskForm
-from wtforms import SubmitField
+from flask_wtf.file import FileAllowed, FileRequired
+from wtforms import FileField, SelectField, StringField, SubmitField
+from wtforms.validators import DataRequired, Length
 
 
 class OCRJobForm(FlaskForm):
+    description = StringField(
+        'Description',
+        validators=[DataRequired(), Length(1, 64)]
+    )
+    file = FileField(
+        'File',
+        validators=[
+            FileAllowed(['pdf', 'tif', 'tiff']),
+            FileRequired()
+        ]
+    )
+    language = SelectField(
+        'Language',
+        choices=[
+            ('', 'Choose your option'),
+            ('eng', 'English'),
+            ('enm', 'English, Middle (1100-1500)'),
+            ('fra', 'French'),
+            ('frm', 'French, Middle (ca. 1400-1600)'),
+            ('deu', 'German'),
+            ('frk', 'German Fraktur'),
+            ('ita', 'Italian'),
+            ('por', 'Portuguese'),
+            ('spa', 'Spanish; Castilian')
+        ],
+        validators=[DataRequired()]
+    )
     submit = SubmitField('Submit')

app/services/views.py

-from flask import redirect, render_template, url_for
+from datetime import datetime
+from flask import current_app, flash, redirect, render_template, url_for, request
 from . import services
 from flask_login import current_user, login_required
 from .forms import OCRJobForm
 from ..import swarm
 from threading import Thread
+import hashlib
+import os
 
 
 @services.route('/ocr', methods=['GET', 'POST'])
@@ -11,29 +14,44 @@ from threading import Thread
 def ocr():
     ocr_job_form = OCRJobForm()
     if ocr_job_form.validate_on_submit():
-        '''
-        ' TODO: Implement a Job class. For now a dictionary representation is
-        '       enough.
-        '''
-        job = {'worker': None,
-               'creator': current_user.id,
-               'id': '5fd40cb0cadef3ab5676c4968fc3d748',
-               'requested_cpus': 2,
-               'requested_memory': 2048,
-               'service': 'ocr',
-               'service_args': {'lang': 'eng',
-                                'version': 'latest'
-                                },
-               'status': 'queued'
-               }
-        '''
-        ' TODO: Let the scheduler run this job in the background.
-        '
-        ' NOTE: Using self created threads is just for testing purpose as there
-        '       is no scheduler available.
-        '''
-        thread = Thread(target=swarm.run, args=(job,))
-        thread.start()
+        app = current_app._get_current_object()
+        id = hashlib.md5(
+            (current_user.username + '_' + datetime.now().isoformat()).encode()
+        ).hexdigest()
+        dir = os.path.join(app.config['OPAQUE_UPLOAD_DIRECTORY'], id)
+
+        try:
+            os.mkdir(dir)
+        except FileExistsError:
+            # Possible MD5 hash collision occurred.
+            flash('Internal error occurred, please try again!')
+        else:
+            file = ocr_job_form.file.data
+            file.save(os.path.join(dir, file.filename))
+
+            '''
+            ' TODO: Implement a Job class. For now a dictionary representation
+            '       is enough.
+            '''
+            job = {'worker': None,
+                   'creator': current_user.id,
+                   'id': id,
+                   'requested_cpus': 2,
+                   'requested_memory': 2048,
+                   'service': 'ocr',
+                   'service_args': {'lang': ocr_job_form.language.data,
+                                    'version': 'latest'
+                                    },
+                   'status': 'queued'
+                   }
+            '''
+            ' TODO: Let the scheduler run this job in the background.
+            '
+            ' NOTE: Using self created threads is just for testing purpose as
+            '       there is no scheduler available.
+            '''
+            thread = Thread(target=swarm.run, args=(job,))
+            thread.start()
         return redirect(url_for('services.ocr'))
 
     return render_template(

app/templates/services/ocr.html.j2

@@ -76,10 +76,46 @@
 </div>
 
 <div class="col s12">
-  <div class="card large">
+  <div class="card">
     <div class="card-content">
-      <form method="POST">
+      <form method="POST" enctype="multipart/form-data">
         {{ ocr_job_form.hidden_tag() }}
+        <div class="row">
+          <div class="col s8">
+            <div class="input-field">
+              <i class="material-icons prefix">description</i>
+              {{ ocr_job_form.description(placeholder='Job description') }}
+              {{ ocr_job_form.description.label }}
+              {% for error in ocr_job_form.description.errors %}
+                <span class="helper-text red-text">{{ error }}</span>
+              {% endfor %}
+            </div>
+          </div>
+          <div class="col s4">
+            <div class="input-field">
+              <i class="material-icons prefix">language</i>
+              {{ ocr_job_form.language() }}
+              {{ ocr_job_form.language.label }}
+              {% for error in ocr_job_form.language.errors %}
+                <span class="helper-text red-text">{{ error }}</span>
+              {% endfor %}
+            </div>
+          </div>
+          <div class="col s8">
+            <div class="file-field input-field">
+              <div class="btn">
+                <span>{{ ocr_job_form.file.label.text }}</span>
+                {{ ocr_job_form.file() }}
+              </div>
+              <div class="file-path-wrapper">
+                <input class="file-path validate" type="text">
+              </div>
+              {% for error in ocr_job_form.file.errors %}
+                <span class="helper-text red-text">{{ error }}</span>
+              {% endfor %}
+            </div>
+          </div>
+        </div>
         {{ ocr_job_form.submit(class='btn') }}
       </form>
     </div>