Add markup package to prepare for org markup format (#1493)

4 files changed, 141 insertions, 37 deletions

diff --git a/modules/markdown/markdown.go b/modules/markdown/markdown.go
index 813fabe178..183804a9ee 100644
--- a/modules/markdown/markdown.go
+++ b/modules/markdown/markdown.go
@@ -19,6 +19,7 @@ import (
 	"golang.org/x/net/html"
 
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
 )
 
@@ -40,18 +41,6 @@ func IsMarkdownFile(name string) bool {
 	return false
 }
 
-// IsReadmeFile reports whether name looks like a README file
-// based on its name.
-func IsReadmeFile(name string) bool {
-	name = strings.ToLower(name)
-	if len(name) < 6 {
-		return false
-	} else if len(name) == 6 {
-		return name == "readme"
-	}
-	return name[:7] == "readme."
-}
-
 var (
 	// MentionPattern matches string that mentions someone, e.g. @Unknwon
 	MentionPattern = regexp.MustCompile(`(\s|^|\W)@[0-9a-zA-Z-_\.]+`)
@@ -707,3 +696,31 @@ func RenderString(raw, urlPrefix string, metas map[string]string) string {
 func RenderWiki(rawBytes []byte, urlPrefix string, metas map[string]string) string {
 	return string(render(rawBytes, urlPrefix, metas, true))
 }
+
+var (
+	// MarkupName describes markup's name
+	MarkupName = "markdown"
+)
+
+func init() {
+	markup.RegisterParser(Parser{})
+}
+
+// Parser implements markup.Parser
+type Parser struct {
+}
+
+// Name implements markup.Parser
+func (Parser) Name() string {
+	return MarkupName
+}
+
+// Extensions implements markup.Parser
+func (Parser) Extensions() []string {
+	return setting.Markdown.FileExtensions
+}
+
+// Render implements markup.Parser
+func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
+	return render(rawBytes, urlPrefix, metas, isWiki)
+}
diff --git a/modules/markdown/markdown_test.go b/modules/markdown/markdown_test.go
index 88d289aa0e..8364146573 100644
--- a/modules/markdown/markdown_test.go
+++ b/modules/markdown/markdown_test.go
@@ -1,3 +1,7 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package markdown_test
 
 import (
@@ -586,31 +590,6 @@ func TestMisc_IsMarkdownFile(t *testing.T) {
 	}
 }
 
-func TestMisc_IsReadmeFile(t *testing.T) {
-	trueTestCases := []string{
-		"readme",
-		"README",
-		"readME.mdown",
-		"README.md",
-	}
-	falseTestCases := []string{
-		"test.md",
-		"wow.MARKDOWN",
-		"LOL.mDoWn",
-		"test",
-		"abcdefg",
-		"abcdefghijklmnopqrstuvwxyz",
-		"test.md.test",
-	}
-
-	for _, testCase := range trueTestCases {
-		assert.True(t, IsReadmeFile(testCase))
-	}
-	for _, testCase := range falseTestCases {
-		assert.False(t, IsReadmeFile(testCase))
-	}
-}
-
 func TestMisc_IsSameDomain(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
diff --git a/modules/markup/markup.go b/modules/markup/markup.go
new file mode 100644
index 0000000000..0847fcfb0d
--- /dev/null
+++ b/modules/markup/markup.go
@@ -0,0 +1,72 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package markup
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// Parser defines an interface for parsering markup file to HTML
+type Parser interface {
+	Name() string // markup format name
+	Extensions() []string
+	Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte
+}
+
+var (
+	parsers = make(map[string]Parser)
+)
+
+// RegisterParser registers a new markup file parser
+func RegisterParser(parser Parser) {
+	for _, ext := range parser.Extensions() {
+		parsers[strings.ToLower(ext)] = parser
+	}
+}
+
+// Render renders markup file to HTML with all specific handling stuff.
+func Render(filename string, rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
+	return render(filename, rawBytes, urlPrefix, metas, false)
+}
+
+func render(filename string, rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
+	extension := strings.ToLower(filepath.Ext(filename))
+	if parser, ok := parsers[extension]; ok {
+		return parser.Render(rawBytes, urlPrefix, metas, isWiki)
+	}
+	return nil
+}
+
+// RenderString renders Markdown to HTML with special links and returns string type.
+func RenderString(filename string, raw, urlPrefix string, metas map[string]string) string {
+	return string(render(filename, []byte(raw), urlPrefix, metas, false))
+}
+
+// RenderWiki renders markdown wiki page to HTML and return HTML string
+func RenderWiki(filename string, rawBytes []byte, urlPrefix string, metas map[string]string) string {
+	return string(render(filename, rawBytes, urlPrefix, metas, true))
+}
+
+// Type returns if markup format via the filename
+func Type(filename string) string {
+	extension := strings.ToLower(filepath.Ext(filename))
+	if parser, ok := parsers[extension]; ok {
+		return parser.Name()
+	}
+	return ""
+}
+
+// IsReadmeFile reports whether name looks like a README file
+// based on its name.
+func IsReadmeFile(name string) bool {
+	name = strings.ToLower(name)
+	if len(name) < 6 {
+		return false
+	} else if len(name) == 6 {
+		return name == "readme"
+	}
+	return name[:7] == "readme."
+}
diff --git a/modules/markup/markup_test.go b/modules/markup/markup_test.go
new file mode 100644
index 0000000000..92caa8ff96
--- /dev/null
+++ b/modules/markup/markup_test.go
@@ -0,0 +1,36 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package markup
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMisc_IsReadmeFile(t *testing.T) {
+	trueTestCases := []string{
+		"readme",
+		"README",
+		"readME.mdown",
+		"README.md",
+	}
+	falseTestCases := []string{
+		"test.md",
+		"wow.MARKDOWN",
+		"LOL.mDoWn",
+		"test",
+		"abcdefg",
+		"abcdefghijklmnopqrstuvwxyz",
+		"test.md.test",
+	}
+
+	for _, testCase := range trueTestCases {
+		assert.True(t, IsReadmeFile(testCase))
+	}
+	for _, testCase := range falseTestCases {
+		assert.False(t, IsReadmeFile(testCase))
+	}
+}