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

src/ecodash/config.go

@@ -4,6 +4,7 @@ import (
 	"database/sql"
 	"encoding/json"
 	"errors"
+	"html/template"
 	"os"
 	"reflect"
 	"regexp"
@@ -41,6 +42,13 @@ type Dashboard struct {
 	Theme       string       `json:"theme"`
 	FooterLinks []Link       `json:"footer_links"`
 	HeaderLinks []Link       `json:"header_links"`
+	MOTD        *MessageCard `json:"motd"`
+}
+
+type MessageCard struct {
+	Title   string        `json:"title"`
+	Content template.HTML `json:"content"`
+	Style   string        `json:"style"`
 }
 
 var errBadHAFormat = errors.New("HomeAssistant base URL is badly formatted")

src/ecodash/http.go

@@ -47,16 +47,17 @@ func (config *Config) AdminEndpoint(c *fiber.Ctx) error {
 		if config.IsAuthorized(c) { // here the user is submitting the form to change configuration
 			err := config.saveAdminForm(c)
 			if err != nil {
-				return config.RenderAdminPanel(c, Warning{
-					Header: "An error occurred!",
-					Body:   html.EscapeString(err.Error()),
+				return config.RenderAdminPanel(c, &MessageCard{
+					Title:   "An error occurred!",
+					Content: template.HTML(html.EscapeString(err.Error())),
+					Style:   "error",
 				})
 			}
-			return config.RenderAdminPanel(c, Warning{
-				Header: "Settings applied",
-				Body: "Your settings have been tested and <b>applied successfully</b>.<br>" +
+			return config.RenderAdminPanel(c, &MessageCard{
+				Title: "Settings applied",
+				Content: "Your settings have been tested and <b>applied successfully</b>.<br>" +
 					"You can continue using EcoDash on the <a href='./'>Home</a>.",
-				IsSuccess: true,
+				Style: "success",
 			})
 		}
 
@@ -64,38 +65,28 @@ func (config *Config) AdminEndpoint(c *fiber.Ctx) error {
 		if c.FormValue("username") == config.Administrator.Username && tools.Hash(c.FormValue("password")) == config.Administrator.PasswordHash {
 			c.Cookie(&fiber.Cookie{Name: "admin_username", Value: c.FormValue("username")})
 			c.Cookie(&fiber.Cookie{Name: "admin_password_hash", Value: tools.Hash(c.FormValue("password"))})
-			return config.RenderAdminPanel(c)
+			return config.RenderAdminPanel(c, nil)
 		}
 		return c.Render("login", fiber.Map{"Defaults": config.getTemplateDefaults(), "Failed": true}, "base")
 	}
 
 	if config.IsAuthorized(c) {
-		return config.RenderAdminPanel(c)
+		return config.RenderAdminPanel(c, nil)
 	}
 	return c.Render("login", config.TemplateDefaultsMap(), "base")
 }
 
-func (config *Config) RenderAdminPanel(c *fiber.Ctx, warning ...Warning) error {
+func (config *Config) RenderAdminPanel(c *fiber.Ctx, message *MessageCard) error {
 	dirs, err := os.ReadDir("./templates")
 	if err != nil {
 		return err
 	}
 
-	if len(warning) > 0 {
-		// #nosec // TODO this is dangerous, even if we're escaping the only place where we're passing a non-literal
-		warning[0].BodyHTML = template.HTML(warning[0].Body)
-		return c.Render("admin", fiber.Map{
-			"Defaults": config.getTemplateDefaults(),
-			"Themes":   dirs,
-			"Config":   config,
-			"Warning":  warning[0],
-		}, "base")
-	}
-
 	return c.Render("admin", fiber.Map{
 		"Defaults": config.getTemplateDefaults(),
 		"Themes":   dirs,
 		"Config":   config,
+		"Message":  message,
 	}, "base")
 }
 
@@ -121,7 +112,7 @@ func (config *Config) saveAdminForm(c *fiber.Ctx) error {
 		HomeAssistant: HomeAssistant{ /*BaseURL to be filled later*/ APIKey: c.FormValue("api_key"), InstallationDate: dayStart(parsedTime)},
 		Sensors:       Sensors{PolledSmartEnergySummation: c.FormValue("polled_smart_energy_summation"), FossilPercentage: c.FormValue("fossil_percentage")},
 		Administrator: Administrator{Username: c.FormValue("username") /*PasswordHash to be filled later*/},
-		Dashboard:     Dashboard{Theme: c.FormValue("theme"), Name: c.FormValue("name"), HeaderLinks: config.Dashboard.HeaderLinks, FooterLinks: config.Dashboard.FooterLinks},
+		Dashboard:     Dashboard{Theme: c.FormValue("theme"), Name: c.FormValue("name"), HeaderLinks: config.Dashboard.HeaderLinks, FooterLinks: config.Dashboard.FooterLinks /*MessageCard to be filled later*/},
 	}
 
 	if c.FormValue("keep_old_password") == "" {
@@ -130,6 +121,14 @@ func (config *Config) saveAdminForm(c *fiber.Ctx) error {
 		form.Administrator.PasswordHash = config.Administrator.PasswordHash
 	}
 
+	if c.FormValue("motd_title") != "" || c.FormValue("motd_content") != "" {
+		form.Dashboard.MOTD = &MessageCard{
+			Title:   c.FormValue("motd_title"),
+			Content: template.HTML(c.FormValue("motd_content")),
+			Style:   c.FormValue("motd_style"),
+		}
+	}
+
 	fmtURL, err := formatURL(c.FormValue("base_url"))
 	if err != nil {
 		return err
@@ -202,5 +201,6 @@ func (config *Config) RenderIndex(c *fiber.Ctx) error {
 		"EnergyConsumptions":  energyConsumptions,
 		"GreenEnergyPercent":  averageExcludingCurrentDay(greenEnergyPercents),
 		"PerDayUsage":         perDayUsage,
+		"MOTD":                config.Dashboard.MOTD,
 	}, "base")
 }

src/main/main.go

@@ -38,7 +38,7 @@ func main() {
 		if config.Administrator.Username == "" || config.Administrator.PasswordHash == "" {
 			c.Cookie(&fiber.Cookie{Name: "admin_username", Value: ""})
 			c.Cookie(&fiber.Cookie{Name: "admin_password_hash", Value: tools.Hash("")})
-			return config.RenderAdminPanel(c)
+			return config.RenderAdminPanel(c, nil)
 		}
 		return config.RenderIndex(c)
 	})

templates/default/admin.html

@@ -4,13 +4,13 @@
     <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">
+{{if .Message}}
+<article class="card {{.Message.Style}}">
     <header>
-            <h3>{{.Warning.Header}}</h3>
+        <h3>{{.Message.Title}}</h3>
     </header>
     <footer>
-            <p>{{.Warning.BodyHTML}}</p>
+        <p>{{.Message.Content}}</p>
     </footer>
 </article>
 {{end}}
@@ -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

@@ -47,3 +47,13 @@ svg, footer img { width: 100% }
     }
 
 }
+
+.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">