From 7b0b720efbf39ded2f72363d36424281df2b0491 Mon Sep 17 00:00:00 2001
From: Pacien
Date: Sun, 30 Jun 2013 19:38:24 +0200
Subject: Add contextual methods

---
 common.go  |  4 +--
 context.go | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 dynamic.go |  4 +--
 3 files changed, 103 insertions(+), 4 deletions(-)
 create mode 100644 context.go

diff --git a/common.go b/common.go
index 460f74d..3547af1 100644
--- a/common.go
+++ b/common.go
@@ -22,7 +22,7 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"github.com/hoisie/mustache"
+	"github.com/drbawb/mustache"
 	"github.com/russross/blackfriday"
 	"io/ioutil"
 	"path"
@@ -100,7 +100,7 @@ func compile(dirPath string, elements map[string][]byte, sourceDir, outputDir, s
 	}
 
 	template := merge(elements)
-	page := mustache.Render(string(template), nil /* TODO: generate contextual variables */)
+	page := mustache.Render(string(template), makeContext(dirPath, sourceDir, outputDir, exts))
 
 	err := writeFile(path.Join(outputDir, strings.TrimPrefix(dirPath, sourceDir), saveAs), []byte(page))
 	if err != nil {
diff --git a/context.go b/context.go
new file mode 100644
index 0000000..8b41a52
--- /dev/null
+++ b/context.go
@@ -0,0 +1,99 @@
+/*
+
+	This file is part of CompileTree (https://github.com/Pacien/CompileTree)
+
+	CompileTree is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	CompileTree is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with CompileTree. If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+package main
+
+import (
+	"path"
+	"strings"
+)
+
+type page struct {
+	Title string
+	URL   string
+}
+
+type context struct {
+	path      string
+	IsCurrent func(params []string, data string) string
+	IsParent  func(params []string, data string) string
+}
+
+// Methods accessible in templates
+
+func (c context) URL() string {
+	p := strings.TrimPrefix(c.path, *settings.sourceDir)
+	return path.Clean("/" + p)
+}
+
+func (c context) Title() string {
+	_, t := path.Split(strings.TrimRight(c.URL(), "/"))
+	return t
+}
+
+func (c context) SubPages() (subPages []page) {
+	dirs, _ := ls(c.path)
+	for _, dir := range dirs {
+		var page page
+		page.Title = dir
+		page.URL = path.Join(c.URL(), dir)
+		subPages = append(subPages, page)
+	}
+	return
+}
+
+func (c context) IsRoot() bool {
+	if c.URL() == "/" {
+		return true
+	}
+	return false
+}
+
+func (c context) isCurrent(pageTitle string) bool {
+	if c.Title() == pageTitle {
+		return true
+	}
+	return false
+}
+
+func (c context) isParent(pageTitle string) bool {
+	for _, parent := range strings.Split(c.URL(), "/") {
+		if parent == pageTitle {
+			return true
+		}
+	}
+	return false
+}
+
+func makeContext(pagePath, sourceDir, outputDir string, exts []string) (c context) {
+	c.path = pagePath
+	c.IsCurrent = func(params []string, data string) string {
+		if c.isCurrent(strings.Join(params, " ")) {
+			return data
+		}
+		return ""
+	}
+	c.IsParent = func(params []string, data string) string {
+		if c.isParent(strings.Join(params, " ")) {
+			return data
+		}
+		return ""
+	}
+	return
+}
diff --git a/dynamic.go b/dynamic.go
index b6388bc..ff567c1 100644
--- a/dynamic.go
+++ b/dynamic.go
@@ -21,7 +21,7 @@ package main
 
 import (
 	"fmt"
-	"github.com/hoisie/mustache"
+	"github.com/drbawb/mustache"
 	"net/http"
 	"path"
 	"strings"
@@ -49,7 +49,7 @@ func handle(w http.ResponseWriter, r *http.Request) {
 
 	// render the page
 	template := merge(elements)
-	page := mustache.Render(string(template), nil /* TODO: generate contextual variables */)
+	page := mustache.Render(string(template), makeContext(path.Join(*settings.sourceDir, request), *settings.sourceDir, *settings.outputDir, settings.exts))
 
 	// serve the page
 	_, err := w.Write([]byte(page))
-- 
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