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e5ef285e59
* Generate meta elements from useful front matters. Limited to the default template and specific elements. * Rerun gofmt * Add "keywords" and remove "language" to/from the list of meta tags. * Add a simple positive list test for the meta tag generation. * Move the meta tag list to a var at the begin of the file. Seperate the Meta tags from the other front matters: - Don't override user settings with name `meta` - Cleaner Code. * Remove the uneccessary `[:]` in the []Bytes to String casting. @mholt was right ;) * One minor refinement. Combining two statements.
93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
package markdown
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import (
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"io"
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"io/ioutil"
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"os"
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"github.com/mholt/caddy/caddyhttp/httpserver"
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"github.com/mholt/caddy/caddyhttp/markdown/metadata"
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"github.com/mholt/caddy/caddyhttp/markdown/summary"
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"github.com/russross/blackfriday"
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)
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// FileInfo represents a file in a particular server context. It wraps the os.FileInfo struct.
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type FileInfo struct {
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os.FileInfo
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ctx httpserver.Context
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}
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var recognizedMetaTags = []string{
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"author",
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"copyright",
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"description",
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"subject",
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}
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// Summarize returns an abbreviated string representation of the markdown stored in this file.
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// wordcount is the number of words returned in the summary.
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func (f FileInfo) Summarize(wordcount int) (string, error) {
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fp, err := f.ctx.Root.Open(f.Name())
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if err != nil {
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return "", err
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}
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defer fp.Close()
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buf, err := ioutil.ReadAll(fp)
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if err != nil {
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return "", err
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}
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return string(summary.Markdown(buf, wordcount)), nil
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}
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// Markdown processes the contents of a page in b. It parses the metadata
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// (if any) and uses the template (if found).
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func (c *Config) Markdown(title string, r io.Reader, dirents []os.FileInfo, ctx httpserver.Context) ([]byte, error) {
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body, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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parser := metadata.GetParser(body)
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markdown := parser.Markdown()
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mdata := parser.Metadata()
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// process markdown
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extns := 0
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extns |= blackfriday.EXTENSION_TABLES
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extns |= blackfriday.EXTENSION_FENCED_CODE
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extns |= blackfriday.EXTENSION_STRIKETHROUGH
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extns |= blackfriday.EXTENSION_DEFINITION_LISTS
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html := blackfriday.Markdown(markdown, c.Renderer, extns)
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// set it as body for template
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mdata.Variables["body"] = string(html)
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// fixup title
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mdata.Variables["title"] = mdata.Title
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if mdata.Variables["title"] == "" {
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mdata.Variables["title"] = title
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}
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// move available and valid front matters to the meta values
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meta := make(map[string]string)
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for _, val := range recognizedMetaTags {
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if mVal, ok := mdata.Variables[val]; ok {
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meta[val] = mVal.(string)
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}
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}
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// massage possible files
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files := []FileInfo{}
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for _, ent := range dirents {
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file := FileInfo{
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FileInfo: ent,
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ctx: ctx,
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}
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files = append(files, file)
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}
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return execTemplate(c, mdata, meta, files, ctx)
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}
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