DHCP Config saving/syntax validation

app.js

@@ -26,6 +26,8 @@ app.use('/get_dashboard', require('./routes/dashboard'));
 app.use('/get_stats', require('./routes/get_stats'));
 app.use('/dhcp_leases', require('./routes/dhcp_leases'));
 app.use('/dhcp_log', require('./routes/dhcp_log'));
+app.use('/dhcp_config', require('./routes/dhcp_config'));
+app.use('/dhcp_config_save', require('./routes/dhcp_config_save'));
 app.use('/api_examples', require('./routes/api_examples'));
 app.use('/glass_settings', require('./routes/glass_settings'));
 app.use('/glass_settings_save', require('./routes/glass_settings_save'));
@@ -176,7 +178,6 @@ var tail_dhcp_log = new tail_module(
 
 tail_dhcp_log.on("line", function(data) {
 	if(listening_to_log_file) {
-		// console.log(data);
 		wss.broadcast_event(data, 'dhcp_log_subscription');
 	}
 });

config/glass_config.json

@@ -2,5 +2,6 @@
   "admin_user": "glassadmin",
   "admin_password": "glassadmin",
   "leases_file": "/var/lib/dhcp/dhcpd.leases",
+  "log_file": "/var/lib/dhcp.log",
   "config_file": "/etc/dhcp/dhcpd.conf"
 }

public/assets/js/glass-pages/page-dhcp-config.js

@@ -0,0 +1,12 @@
+var dhcp_config = ace.edit("dhcp_config");
+dhcp_config.setTheme("ace/theme/terminal");
+dhcp_config.$blockScrolling = Infinity;
+
+function save_dhcp_config () {
+	dhcp_config_form_data = get_form_query_string("dhcp_config_form");
+	dhcp_config_form_data = dhcp_config_form_data + "&dhcp_config_data=" + encodeURIComponent(dhcp_config.getValue());
+
+	$.post( "/dhcp_config_save", dhcp_config_form_data, function( data ) {
+		$( "#dhcp_config_result" ).html( data );
+	});
+}

public/templates/dhcp_config.html

@@ -0,0 +1,35 @@
+<div class="row">
+    <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
+        <div class="card">
+            <div class="header">
+                <h2>
+                    [title]
+                </h2>
+            </div>
+            <div class="body">
+                [c_content]
+                <form id="dhcp_config_form">
+                    <label>DHCP Config</label>
+                    <div class="form-group">
+                        <div class="form-line">
+                            <input disabled type="text" id="dhcp_config_location" class="form-control" value="[dhcp_config_location]">
+                        </div>
+                    </div>
+
+                    <div id="dhcp_config" style="width:100%; height:800px; color: #95cd24">[dhcp_config_content]</div>
+
+                    <br>
+                    <button type="button" class="btn btn-info waves-effect" onclick="save_dhcp_config()"><i class="material-icons">system_update_alt</i> <span>Save Config</span></button>
+
+                </form>
+
+                <div id="dhcp_config_result"></div>
+
+            </div>
+        </div>
+    </div>
+</div>
+
+<script src="assets/js/ace_editor/ace.js" type="text/javascript" charset="utf-8"></script>
+<script src="assets/js/ace_editor/theme-terminal.js" type="text/javascript" charset="utf-8"></script>
+<script src="assets/js/glass-pages/page-dhcp-config.js" type="text/javascript" charset="utf-8"></script>

public/templates/dhcp_log.html

@@ -27,8 +27,6 @@
 
                     <div id="dhcp_log" style="width:100%; height:800px; color: #95cd24"></div>
                 </form>
-
-
             </div>
         </div>
     </div>
@@ -36,4 +34,4 @@
 
 <script src="assets/js/ace_editor/ace.js" type="text/javascript" charset="utf-8"></script>
 <script src="assets/js/ace_editor/theme-terminal.js" type="text/javascript" charset="utf-8"></script>
-<script src="assets/js/page-dhcp-logs.js" type="text/javascript" charset="utf-8"></script>
+<script src="assets/js/glass-pages/page-dhcp-logs.js" type="text/javascript" charset="utf-8"></script>

public/templates/index.html

@@ -91,6 +91,14 @@
                     </a>
                 </li>
 
+                <li class="header">Admin</li>
+                <li>
+                    <a href="/dhcp_config" pjax="1">
+                        <i class="material-icons">mode_edit</i>
+                        <span>DHCP Config</span>
+                    </a>
+                </li>
+
                 <li class="header">Settings</li>
                 <li>
                     <a href="/glass_settings" pjax="1">
@@ -99,13 +107,7 @@
                     </a>
                 </li>
 
-                <li class="header">Admin</li>
+
-                <li>
-                    <a href="/dhcp_config" pjax="1">
-                        <i class="material-icons">mode_edit</i>
-                        <span>DHCP Config</span>
-                    </a>
-                </li>
 
                 <li class="header">Glass API</li>
                 <li>
@@ -180,6 +182,7 @@
 <script src="assets/plugins/jquery-datatable/skin/bootstrap/js/dataTables.bootstrap.js"></script>
 <script src="assets/plugins/jquery-datatable/extensions/export/dataTables.buttons.min.js"></script>
 
+
 <script type="text/javascript">
 
     function get_dashboard() {

routes/dhcp_config.js

@@ -0,0 +1,26 @@
+var express = require('express');
+var router = express.Router();
+var fs = require('fs');
+var template_render = require('../lib/render_template.js');
+
+router.get('/', function(req, res, next) {
+
+	var content = "";
+
+	content = template_render.get_template("dhcp_config");
+
+	/* Read Config */
+	var json_file = require('jsonfile');
+	var glass_config = json_file.readFileSync('config/glass_config.json');
+
+	content = template_render.set_template_variable(content, "title", "DHCP Config");
+	content = template_render.set_template_variable(content, "c_content", "");
+	content = template_render.set_template_variable(content, "dhcp_config_location", glass_config.config_file);
+
+	var dhcp_config = fs.readFileSync(glass_config.config_file, 'utf8');
+	content = template_render.set_template_variable(content, "dhcp_config_content", dhcp_config);
+
+	res.send(template_render.get_index_template(content, req.url));
+});
+
+module.exports = router;

routes/dhcp_config_save.js

@@ -0,0 +1,41 @@
+/**
+ * Created by cmiles on 8/9/2017.
+ */
+
+var express = require('express');
+var router = express.Router();
+
+router.post('/', function(req, res, next) {
+	var request = req.body;
+
+
+	fs.writeFileSync("./syntax_verify_config", request.dhcp_config_data, 'utf8');
+
+	var exec = require('child_process').exec;
+
+	exec('dhcpd -t -cf ./syntax_verify_config > verify_output 2> verify_output', function(err, stdout, stderr)
+	{
+		var output = fs.readFileSync('./verify_output', "utf8");
+
+		if (err) {
+			output = output.replace("\n", "<br>");
+			res.send('<script type="text/javascript">notification(\'There are errors!<br>See below for details...\');</script><br></b><b style="color:red">' + output + '</b>');
+			return;
+		}
+		else {
+
+			res.send('<script type="text/javascript">notification(' + JSON.stringify("<b>Syntax OK</b> <br><br>" + output) + ')</script>');
+
+			/* Read Config */
+			var json_file = require('jsonfile');
+			var glass_config = json_file.readFileSync('config/glass_config.json');
+
+			fs.writeFileSync(glass_config.config_file, request.dhcp_config_data, 'utf8');
+
+			fs.unlinkSync("./verify_output");
+			fs.unlinkSync("./syntax_verify_config");
+		}
+	});
+});
+
+module.exports = router;

routes/glass_settings_save.js

@@ -10,7 +10,7 @@ router.post('/', function(req, res, next) {
 	var json_file = require('jsonfile');
 
 	json_file.writeFile('./config/glass_config.json', request, {spaces: 2}, function(err) {
-		console.error(err)
+		console.error(err);
 	});
 
 	res.send('<script type="text/javascript">notification(\'Saved Config!\')</script>');