added year search function

web/app/search.py

         core = 'all'
     if sort is None:
         sort = 'relevance'
-    search_results = solr.country_search(core, sort, country_code)
+    field = 'country'
+    search_results = solr.term_search(core, sort, field, country_code)
     results = search_results[0]
     num_found = search_results[1]
     total_number = solr.get_total_number(core)
 
     return render_template('search.html', results=results, num_found=num_found, total_number=total_number, country_code=country_code, core=core, sort=sort)
+
+# route for year search page
+@search.route('/search/year/', methods=['GET', 'POST'])
+def year_search():
+    if request.method == 'POST':
+        year = request.form.get('year')
+        core = request.form.get('core')
+        sort = request.form.get('sort')
+    else:
+        year = request.args.get('year')
+        core = request.args.get('core')
+        sort = request.args.get('sort')
+    if year is None:
+        return redirect(url_for('main.index'))
+    if core is None:
+        core = 'all'
+    if sort is None:
+        sort = 'relevance'
+    field = 'year'
+    search_results = solr.term_search(core, sort, field, year)
+    results = search_results[0]
+    num_found = search_results[1]
+    total_number = solr.get_total_number(core)
+
+    return render_template('search.html', results=results, num_found=num_found, total_number=total_number, year=year, core=core, sort=sort)

web/app/solr.py

             output.append(result_output)
     return output, num_found
 
-def country_search(core, sort, country_code):
+def term_search(core, sort, field, input):
 
     # Assemble a query string to send to Solr. This uses the Solr hostname from config.env. Solr's query syntax can be found at many sites including https://lucene.apache.org/solr/guide/6_6/the-standard-query-parser.html
     if (sort == 'relevance'):
-        solrurl = 'http://' + solr_hostname + ':' + solr_port + '/solr/' + core + '/select?q.op=OR&q=%7B!term%20f%3Dcountry%7D' + country_code + '&wt=json'
+        solrurl = 'http://' + solr_hostname + ':' + solr_port + '/solr/' + core + '/select?q.op=OR&q=%7B!term%20f%3D' + field + '%7D' + input + '&wt=json'
     else:
-        solrurl = 'http://' + solr_hostname + ':' + solr_port + '/solr/' + core + '/select?q.op=OR&q=%7B!term%20f%3Dcountry%7D' + country_code + '&wt=json&sort=' + sort
+        solrurl = 'http://' + solr_hostname + ':' + solr_port + '/solr/' + core + '/select?q.op=OR&q=%7B!term%20f%3D' + field + '%7D' + input + '&wt=json&sort=' + sort
 
     # get result
     request = requests.get(solrurl)

web/app/templates/data.html

       {% if i % 2 %}
         {{ year_data[i] }}<br>
       {% else %}
-        {{ year_data[i] }}:
+        <a href="{{ url_for('search.year_search', year=year_data[i]) }}">
+          {{ year_data[i] }}:
+        </a>
       {% endif %}
     {% endfor %}
   </div>

web/app/templates/search.html

   {% elif country_code is defined %}
   <form action="{{ url_for('search.country_search') }}" method="POST">
     <input type="hidden" name="country_code" value="{{ country_code }}">
+  {% elif year is defined %}
+  <form action="{{ url_for('search.year_search') }}" method="POST">
+    <input type="hidden" name="year" value="{{ year }}">
   {% endif %}
     <input type="hidden" name="searchopt" value="{{ core }}">
     sort by: