start categories listing page, in the process of reworking the template code a bit

categories/categories.go

@@ -59,6 +59,7 @@ func (category *Category) Depth() int {
     return depth
 }
 
+// Helper function for templates (add form select list)
 func (category *Category) ToString() string {
     return strings.Repeat("- ", category.Depth()) + category.Name
 }

main.go

@@ -6,11 +6,8 @@ import (
 	"fmt"
 	"github.com/gorilla/sessions"
 	_ "github.com/lib/pq"
-	"html/template"
 	"net/http"
 	"os"
-	"path/filepath"
-	"regexp"
 	"flag"
 )
 
@@ -39,7 +36,6 @@ var (
 	config    Config
 	db        *sql.DB
 	store     = sessions.NewCookieStore([]byte("key-store-auth-secret"))
-	templates = map[string]*template.Template{}
 )
 
 func loadConfig(env string) {
@@ -71,22 +67,6 @@ func dbConnect() {
 	}
 }
 
-func initTemplates() {
-	files, _ := filepath.Glob("templates/pages/*.html")
-	re := regexp.MustCompile("templates/pages/(.*).html")
-	fmt.Println("Loading Templates:")
-	for _, t := range files {
-		name := re.FindStringSubmatch(t)
-		fmt.Println("  ", name[1])
-		var err error
-		templates[name[1]], err = template.ParseFiles("templates/layout.html", t)
-		if err != nil {
-			fmt.Println("Template load error: ", err)
-			os.Exit(-1)
-		}
-	}
-}
-
 func main() {
 	fmt.Println("transmet ", VERSION)
 	

route_handlers.go

@@ -62,14 +62,6 @@ func getPostHandler(getFn, postFn func(http.ResponseWriter, *http.Request)) func
 	}
 }
 
-func ShowTemplate(template string, w http.ResponseWriter, data map[string]interface{}) {
-	err := templates[template].Execute(w, data)
-	if err != nil {
-		fmt.Println("Exec err: ", err)
-	}
-	// TODO: show error 500 page
-}	
-
 // Log in page handler
 func LoginFormHandler(w http.ResponseWriter, r *http.Request) {
 	session, _ := store.Get(r, "c_user")
@@ -252,12 +244,24 @@ func addedHandler(w http.ResponseWriter, r *http.Request, user *user.User) {
 }
 
 
-
 func ServeFileHandler(res http.ResponseWriter, req *http.Request) {  
       fname := path.Base(req.URL.Path)  
       http.ServeFile(res, req, "./"+fname)  
  }  
 
+func categoriesFormHandler(w http.ResponseWriter, r *http.Request, user *user.User) {
+    session, _ := store.Get(r, "c_user")
+    flashes := GetFlashes(session)
+    session.Save(r, w)
+    categories.LoadCategories(db)
+
+    ShowTemplate("categories", w, map[string]interface{}{"user": user, "flashes": flashes, "categories": categories.CategoriesTree})
+}
+
+func categoriesPostHandler(w http.ResponseWriter, r *http.Request, user *user.User) {
+    http.Redirect(w, r, "/categories", http.StatusFound)
+}
+
 func init_route_handlers() {
     http.Handle("/js/", http.StripPrefix("/js/", http.FileServer(http.Dir("js/"))))
 	http.Handle("/css/", http.StripPrefix("/css/", http.FileServer(http.Dir("css/"))))
@@ -274,6 +278,7 @@ func init_route_handlers() {
 	r.HandleFunc("/export", userHandler(exportHandler))
 	r.HandleFunc("/added", userHandler(addedHandler))
 	
+	r.HandleFunc("/categories", getPostHandler(userHandler(categoriesFormHandler), userHandler(categoriesPostHandler)))
 	
 	http.Handle("/", r)
 }

templates.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+    "fmt"
+	"html/template"
+	"path/filepath"
+	"regexp"
+	"net/http"
+)
+
+var (
+    	templates = map[string]*template.Template{}
+)
+
+// Tempalte helper functions
+var funcMap = template.FuncMap {
+    "add": func (x, y int) int { return x + y },
+    "minus": func (x, y int) int { return x - y },
+}
+
+
+func initTemplates() {
+	files, _ := filepath.Glob("templates/pages/*.html")
+	re := regexp.MustCompile("templates/pages/(.*).html")
+	fmt.Println("Loading Templates:")
+	for _, t := range files {
+		name := re.FindStringSubmatch(t)
+		fmt.Println("  ", name[1])
+		templates[name[1]] = template.Must(template.New(name[1]).Funcs(funcMap).ParseFiles("templates/layout.html", t))
+	}
+}
+
+func ShowTemplate(template string, w http.ResponseWriter, data map[string]interface{}) {
+	err := templates[template].ExecuteTemplate(w, "layout.html", data)
+	if err != nil {
+		fmt.Println("Exec err: ", err)
+	}
+	// TODO: show error 500 page
+}	

templates/layout.html

@@ -29,6 +29,7 @@
             <span class="icon-bar"></span>
           </button>
           <a class="navbar-brand" href="/">transmet</a>
+          <a class="navbar-brand" href="/categories">categories</a>
         </div>
         <div class="collapse navbar-collapse">
           <ul class="nav navbar-nav">

templates/pages/categories.html

@@ -0,0 +1,27 @@
+{{define "body"}}
+<h2 class="form-categories-heading">Categories</h2>
+{{template "flashes" .}}
+<div class="row">
+
+{{range $category := .categories}}
+            {{template "row-category" $category}}
+{{end}}
+
+</div>
+{{end}}
+
+{{define "row-category"}}
+    {{if .Parent.Valid }}
+        {{with .Depth}}
+            <div class="col-xs-{{.}} child-depth"></div>
+            <div class="col-xs-{{minus 12 .}} category-row">
+        {{end}}
+    {{else}}
+        <div class="col-xs-12 category-row">
+    {{end}}
+    {{.Name}}</div>
+    
+    {{range $child := .Children}}
+        {{template "row-category" $child}}
+     {{end}}    
+{{end}}

templates/pages/list.html

@@ -1,5 +1,5 @@
 {{define "body"}}
-<h2 class="form-add-heading">List</h2>
+<h2 class="list-heading">List</h2>
 {{template "flashes" .}}
 
 <div class="row">