Add Logging View

jwql/website/apps/jwql/templates/base.html

@@ -84,6 +84,10 @@
 					 <!--API-->
 					<li class="nav-item active">
 	            		<a class="nav-link" href={{ url('jwql:api') }}>API<span class="sr-only">(current)</span></a>
+					</li>
+					<!--Log View-->
+					<li class="nav-item active">
+	            		<a class="nav-link" href={{ url('jwql:log_view') }}>View Logs<span class="sr-only">(current)</span></a>
 	          		</li>
 	          		<!--Documentation-->
 		      		<li class="nav-item active">

jwql/website/apps/jwql/templates/log_view.html

@@ -0,0 +1,73 @@
+{% extends "base.html" %}
+
+{% block preamble %}
+
+	<title>Monitor Log Viewer - JWQL</title>
+
+{% endblock %}
+
+{% block content %}
+
+    <main role="main" class="container">
+    	<h2>Explore JWQL monitoring logs through the web browser.</h2><hr>
+
+        <p align="justify">
+            This page allows users to load monitoring logs into the web browsers. This feature
+            obtains logs from all JWQL servers (ops, dev, and test). 
+
+            <br><br>
+        </p>
+
+        <hr>
+        <form action="" method="post" id="logForm">
+            {{ csrf_input }}
+
+            <!--LOG SELECT DROPDOWN-->
+            <h4>Select JWQL Monitoring Log</h4>
+                <div class="col-6 mx-auto text-left mt-5">
+                    <input id="log_select" type="text" list="logs" placeholder="Log Name" class="form-control">
+                    <datalist id="logs">
+                        {% for log_name in all_logs %}
+                            <option id="{{ log_name }}" value="{{ log_name }}"></option>
+                        {% endfor %}
+                    </datalist>
+                </div>
+
+            <br>
+
+            <button id="log_submit" name="log_submit" class="btn btn-primary" onclick="GetSelectedTextValue()" type="submit" style="float: left;" disabled>Submit</button>
+            <br><br><br>
+
+            <!-- If log is passed, render log. -->
+            <!-- Log is not rendered when coming from home/monitor views -->
+            {% if log_text %}
+                <h4> {{ log_name|safe }} </h4><hr>
+                <!-- Show Logs here -->
+                <pre>
+                    {{ log_text }}
+                </pre>
+            {% endif %}
+
+            <script type="text/javascript">
+                function GetSelectedTextValue() {
+                    var log_value = document.getElementById("log_select").value;
+                    document.getElementById("log_submit").value = log_value;
+                }
+            </script>
+
+            <script type="text/javascript">
+                const idInputField = document.getElementById('log_select');
+                var logsList = document.getElementById("logs");
+                idInputField.addEventListener('input', function () {
+                    if (logsList.options.namedItem(this.value) != null) {
+                        document.getElementById("log_submit").disabled = false;
+                    } else {
+                        document.getElementById("log_submit").disabled = true;
+                    }
+                });
+            </script>
+
+        </form>
+    </main>
+
+{% endblock %}

jwql/website/apps/jwql/urls.py

@@ -79,6 +79,7 @@
     path('edb/', views.engineering_database, name='edb'),
     path('jwqldb/', views.jwqldb_table_viewer, name='jwqldb'),
     path('jwqldb/<str:tablename_param>', views.jwqldb_table_viewer, name='jwqldb_table_viewer'),
+    path('log_view/', views.log_view, name='log_view'),
     path('query_submit/', views.query_submit, name='query_submit'),
     re_path(r'^(?P<inst>({}))/$'.format(instruments), views.instrument, name='instrument'),
     re_path(r'^(?P<inst>({}))/archive/$'.format(instruments), views.archived_proposals, name='archive'),

jwql/website/apps/jwql/views.py

@@ -44,6 +44,7 @@
 from collections import defaultdict
 from copy import deepcopy
 import csv
+import glob
 import logging
 import os
 import operator
@@ -746,6 +747,50 @@ def jwqldb_table_viewer(request, tablename_param=None):
     return render(request, template, context)
 
 
+def log_view(request):
+    """Access JWQL monitoring logs from the web app.
+
+    Parameters
+    ----------
+    request : HttpRequest object
+        Incoming request from the webpage
+
+    Returns
+    -------
+    HttpResponse object
+        Outgoing response sent to the webpage
+    """
+
+    template = 'log_view.html'
+    log_path = get_config()['log_dir']
+    log_name = request.POST.get('log_submit', None)
+
+    full_uri = request.build_absolute_uri()
+
+    if 'dljwql' in full_uri:
+        server = 'dev'
+    elif 'tljwql' in full_uri:
+        server = 'test'
+    else:
+        server = 'ops'
+
+    full_log_paths = sorted(glob.glob(os.path.join(log_path, server, '*', '*')), reverse=True)
+    full_log_paths = [log for log in full_log_paths if not os.path.basename(log).startswith('.')]
+    log_dictionary = {os.path.basename(path): path for path in full_log_paths}
+
+    if log_name:
+        with open(log_dictionary[log_name]) as f:
+            log_text = f.read()
+    else:
+        log_text = None
+
+    context = {'inst': '',
+               'all_logs': log_dictionary,
+               'log_text': log_text,
+               'log_name': log_name}
+
+    return render(request, template, context)
+
 def not_found(request, *kwargs):
     """Generate a ``not_found`` page