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// Copyright 2015 Light Code Labs, LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package markdown
import (
"io"
"io/ioutil"
"os"
"github.com/caddyserver/caddy/caddyhttp/httpserver"
"github.com/caddyserver/caddy/caddyhttp/markdown/metadata"
"github.com/caddyserver/caddy/caddyhttp/markdown/summary"
"github.com/russross/blackfriday"
)
// FileInfo represents a file in a particular server context. It wraps the os.FileInfo struct.
type FileInfo struct {
os.FileInfo
ctx httpserver.Context
}
var recognizedMetaTags = []string{
"author",
"copyright",
"description",
"subject",
}
// Summarize returns an abbreviated string representation of the markdown stored in this file.
// wordcount is the number of words returned in the summary.
func (f FileInfo) Summarize(wordcount int) (string, error) {
fp, err := f.ctx.Root.Open(f.Name())
if err != nil {
return "", err
}
defer fp.Close()
buf, err := ioutil.ReadAll(fp)
if err != nil {
return "", err
}
return string(summary.Markdown(buf, wordcount)), nil
}
// Markdown processes the contents of a page in b. It parses the metadata
// (if any) and uses the template (if found).
func (c *Config) Markdown(title string, r io.Reader, dirents []os.FileInfo, ctx httpserver.Context) ([]byte, error) {
body, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
parser := metadata.GetParser(body)
markdown := parser.Markdown()
mdata := parser.Metadata()
// process markdown
extns := 0
extns |= blackfriday.EXTENSION_TABLES
extns |= blackfriday.EXTENSION_FENCED_CODE
extns |= blackfriday.EXTENSION_STRIKETHROUGH
extns |= blackfriday.EXTENSION_DEFINITION_LISTS
html := blackfriday.Markdown(markdown, c.Renderer, extns)
// set it as body for template
mdata.Variables["body"] = string(html)
// fixup title
mdata.Variables["title"] = mdata.Title
if mdata.Variables["title"] == "" {
mdata.Variables["title"] = title
}
// move available and valid front matters to the meta values
meta := make(map[string]string)
for _, val := range recognizedMetaTags {
if mVal, ok := mdata.Variables[val]; ok {
meta[val] = mVal.(string)
}
}
// massage possible files
files := []FileInfo{}
for _, ent := range dirents {
file := FileInfo{
FileInfo: ent,
ctx: ctx,
}
files = append(files, file)
}
return execTemplate(c, mdata, meta, files, ctx)
}
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