Much half-working work

src/python/web/config.py

@@ -0,0 +1,2 @@
+# config.py - a configuration file for index.py
+EMAIL_RANGE = 20

src/python/web/helpers.py

@@ -0,0 +1,7 @@
+# helpers.py - a helper library for index.py
+
+def get_offsets(offset1, offset2, increment):
+  offsets = {}
+  offsets['next'] = {'top': offset2 + increment, 'bottom': offset1 + increment}
+  offsets['previous'] = {'top': offset2 - increment, 'bottom': offset2 - increment}
+  return offsets

src/python/web/index.py

@@ -9,6 +9,9 @@
 # ElasticSearch
 import json, pyelasticsearch
 
+# Simple configuration and helpers
+import config, helpers
+
 app = Flask(__name__)
 connection = Connection()
 db = connection.agile_data
@@ -36,12 +39,14 @@ def email(message_id):
 default_offsets={'offset1': 0, 'offset2': 20}
 @app.route('/emails', defaults=default_offsets)
 @app.route('/emails/', defaults=default_offsets)
-@app.route("/emails/<offset1>/<offset2>")
+@app.route("/emails/<int:offset1>/<int:offset2>")
 def list_emaildb(offset1, offset2):
   offset1 = int(offset1)
   offset2 = int(offset2)
   emails = emaildb.find()[offset1:offset2] # Uses a MongoDB cursor
-  return render_template('partials/emails.html', emails=emails)
+  nav_offsets = get_offsets(offset1, offset2, config.EMAIL_RANGE)
+  data = {'emails': emails, 'nav_offsets': nav_offsets}
+  return render_template('partials/emails.html', data=data)
 
 @app.route("/emails/search/<query>")
 def search_email(query):

src/python/web/templates/macros.jnj

@@ -2,3 +2,29 @@
 {% macro display_link(value, base_path, display) -%}
   <div class="span" style="display: inline-block"><a href="{{ base_path }}/{{ value }}">{{ display }}</a></div>
 {% endmacro -%}
+
+<!-- Display a pair of nav links -->
+{% macro display_nav_links(offset1, offset2, increment) -%}
+  <div style="text-align: center">
+    {{ nav_link('Previous', offset1, offset2, increment) }}
+    {{ nav_link('Next', offset1, offset2, increment )}}
+  </div>
+{% endmacro -%}
+
+<!-- Display a single nav link -->
+{% macro nav_link(label, offset1, offset2, increment) -%}
+  {% set bottom = get_increment(offset1, increment, label) -%}
+  {% set top = get_increment(offset2, increment, label) -%}
+  {% if bottom > 0 -%}
+    <a href="/emails/{{ bottom }}/{{ top }}">{{ label }}</a>
+  {% endif -%}
+{% endmacro -%}
+
+{% macro get_increment( offset, increment, label ) -%}
+  {% if label == 'Previous' -%}
+    {{ offset - increment }}
+  {% endif -%}
+  {% if label == 'Next' -%}
+    {{ offset + increment }}
+  {% endif -%}
+{% endmacro -%}

src/python/web/templates/partials/emails.html

@@ -35,4 +35,5 @@
       {% endfor %}
     </tbody>
   </table>
-{% endblock -%}
+  {{ common.display_v_links(data['offset1'], data['offset2'], 20) }}
+{% endblock -%}