Add example theme support

Author: kennygrant

Diff for: README.md

@@ -7,6 +7,17 @@ Fragmenta CMS is a user-friendly Content Management System built with Go. For mo
 ## Usage
 
 
+
+## Config 
+
+
+#### Session Name
+The *session_name* key is used to set the name used in cookies.
+
+#### Theme
+The *theme* key is used to set the theme. To use a theme, add a key with the name of your theme folder to the fragmenta.json file. Theme templates will then override any templates in the app at the same path. 
+
+
 ## Requirements 
 
 Go 1.8 is now required, as some new features from this release and the 1.7 release are used. 

Diff for: src/app/app.go

@@ -1,7 +1,9 @@
 package app
 
 import (
+	"fmt"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/fragmenta/assets"
@@ -106,29 +108,61 @@ func SetupAssets() {
 		}
 	}
 
-	// Set up helpers which are aware of fingerprinted assets
-	// These behave differently depending on the compile flag above
-	// when compile is set to no, they use precompiled assets
-	// otherwise they serve all files in a group separately
-	view.Helpers["style"] = appAssets.StyleLink
-	view.Helpers["script"] = appAssets.ScriptLink
-
 }
 
 // SetupView sets up the view package by loadind templates.
 func SetupView() {
 	defer log.Time(time.Now(), log.V{"msg": "Finished loading templates"})
 
 	view.Production = config.Production()
-	err := view.LoadTemplates()
+
+	// Start with default source path
+	paths := []string{"src"}
+
+	// Add a theme path if we have one
+	theme := config.Get("theme")
+	if theme != "" {
+		log.Log(log.V{"msg": "loading templates for theme", "theme": theme})
+		themePath := fmt.Sprintf("themes/%s/src", theme)
+		paths = append(paths, themePath)
+	}
+
+	err := view.LoadTemplatesAtPaths(paths, helperFuncs())
 	if err != nil {
-		//	server.Fatalf("Error reading templates %s", err)
 		log.Fatal(log.V{"msg": "unable to read templates", "error": err})
 		os.Exit(1)
 	}
 
 }
 
+// helperFuncs returns a setr of helper functions for view templates
+func helperFuncs() map[string]interface{} {
+
+	helpers := view.DefaultHelpers()
+
+	// Set up helpers which are aware of fingerprinted assets
+	// These behave differently depending on the compile flag above
+	// when compile is set to no, they use precompiled assets
+	// otherwise they serve all files in a group separately
+	helpers["style"] = appAssets.StyleLink
+	helpers["script"] = appAssets.ScriptLink
+
+	// Get the server config for the root_url
+	rootURL := config.Get("root_url")
+
+	// If running locally use localhost instead
+	host, err := os.Hostname()
+	if err == nil && strings.HasSuffix(host, ".local") {
+		rootURL = "http://localhost:3000"
+	}
+
+	helpers["root_url"] = func() string {
+		return rootURL
+	}
+
+	return helpers
+}
+
 // SetupDatabase sets up the db with query given our server config.
 func SetupDatabase() {
 	defer log.Time(time.Now(), log.V{"msg": "Finished opening database", "db": config.Get("db"), "user": config.Get("db_user")})

Diff for: src/app/views/header.html.got

@@ -3,12 +3,8 @@
 {{ end }}
 <nav>
   <ul>
-    <li><a href="http://fragmenta.eu">Fragmenta</a></li>
-    <li><a href="http://fragmenta.eu/install">Install</a></li>
-    <li><a href="http://fragmenta.eu/develop">Develop</a></li>
-    <li><a href="http://fragmenta.eu/docs">Docs</a></li>
-    <li><a href="http://fragmenta.eu/blog">Blog</a></li>
-    <li><a href="https://github.com/fragmenta">Github</a></li>
+    <li><a href="/">Home</a></li>
+    <li><a href="/about">About</a></li>
   </ul>
 </nav>
 

Diff for: themes/fragmenta/src/app/views/header.html.got

@@ -0,0 +1,15 @@
+{{ if .currentUser.Admin }}
+  {{ template "app/views/admin.html.got" . }}
+{{ end }}
+<nav>
+  <ul>
+    <li><a href="http://fragmenta.eu">Fragmenta</a></li>
+    <li><a href="http://fragmenta.eu/install">Install</a></li>
+    <li><a href="http://fragmenta.eu/develop">Develop</a></li>
+    <li><a href="http://fragmenta.eu/docs">Docs</a></li>
+    <li><a href="http://fragmenta.eu/blog">Blog</a></li>
+    <li><a href="https://github.com/fragmenta">Github</a></li>
+  </ul>
+</nav>
+
+