Add admin-settable MOTD, rewrite existing warning system to use it

templates/default/admin.html

@@ -4,15 +4,15 @@
     <a href="https://ecodash.xyz/docs/setup/admin-panel">Documentation</a>
 </p>
 
-{{if .Warning}}
-    <article class="card" style="background-color: {{if .Warning.IsSuccess}}#008000{{else}}#ff5050{{end}}; color: white">
-        <header>
-            <h3>{{.Warning.Header}}</h3>
-        </header>
-        <footer>
-            <p>{{.Warning.BodyHTML}}</p>
-        </footer>
-    </article>
+{{if .Message}}
+<article class="card {{.Message.Style}}">
+    <header>
+        <h3>{{.Message.Title}}</h3>
+    </header>
+    <footer>
+        <p>{{.Message.Content}}</p>
+    </footer>
+</article>
 {{end}}
 
 <form action="./admin" method="POST">
@@ -45,6 +45,16 @@
         </select>
     </label>
     <label>Dashboard name <input type="text" name="name" value="{{.Config.Dashboard.Name}}"></label>
+    <label>MOTD title <input type="text" name="motd_title" value="{{if .Config.Dashboard.MOTD}}{{.Config.Dashboard.MOTD.Title}}{{end}}"></label>
+    <label>MOTD content <input type="text" name="motd_content" value="{{if .Config.Dashboard.MOTD}}{{.Config.Dashboard.MOTD.Content}}{{end}}"></label>
+    <label>MOTD style
+        <select name="motd_style">
+            <option value="" {{if .Config.Dashboard.MOTD}}{{if eq .Config.Dashboard.MOTD.Style ""}}selected{{end}}{{end}}>Default</option>
+            <option value="success" {{if .Config.Dashboard.MOTD}}{{if eq .Config.Dashboard.MOTD.Style "success"}}selected{{end}}{{end}}>Success</option>
+            <option value="warning" {{if .Config.Dashboard.MOTD}}{{if eq .Config.Dashboard.MOTD.Style "warning"}}selected{{end}}{{end}}>Warning</option>
+            <option value="error" {{if .Config.Dashboard.MOTD}}{{if eq .Config.Dashboard.MOTD.Style "error"}}selected{{end}}{{end}}>Error</option>
+        </select>
+    </label>
     <input type="submit" placeholder="Submit" style="margin-top: 2em; width: 100%">
 
 </form>

templates/default/assets/custom.css

@@ -46,4 +46,14 @@ svg, footer img { width: 100% }
         fill: white;
     }
 
+}
+
+.success {
+    background-color: #008000; color: white
+}
+.warning {
+    background-color: #807a00; color: white
+}
+.error {
+    background-color: #800000; color: white
 }

templates/default/index.html

@@ -1,5 +1,16 @@
 <script src="assets/chartjs/chart.js"></script>
 
+{{if .MOTD}}
+<article class="card {{.MOTD.Style}}">
+    <header>
+        <h3>{{.MOTD.Title}}</h3>
+    </header>
+    <footer>
+        <p>{{.MOTD.Content}}</p>
+    </footer>
+</article>
+{{end}}
+
 <h1>Green report</h1>
 
 <canvas id="report"></canvas>
@@ -7,7 +18,6 @@
     This server's energy statistics for the last eight days (current day included)
 </p>
 
-
 <div class="flex two">
     <div>
         <div class="home-cards card">