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package blog
import (
"html/template"
"io/ioutil"
"os"
"path/filepath"
"sort"
"strings"
"time"
"christine.website/cmd/site/internal/front"
"github.com/russross/blackfriday"
)
// Post is a single blogpost.
type Post struct {
Title string `json:"title"`
Link string `json:"link"`
Summary string `json:"summary,omitifempty"`
Body string `json:"body_markdown"`
BodyHTML template.HTML `json:"body,omitempty"`
Series string `json:"series,omitempty"`
Tags []string `json:"tags,omitempty"`
SlidesLink string `json:"slides_link,omitempty"`
ImageURL string `json:"image_url,omitempty"`
ThumbURL string `json:"thumb_url,omitempty"`
Date time.Time
DateString string `json:"date"`
}
// Posts implements sort.Interface for a slice of Post objects.
type Posts []Post
func (p Posts) Series() []string {
names := map[string]struct{}{}
for _, ps := range p {
if ps.Series != "" {
names[ps.Series] = struct{}{}
}
}
var result []string
for name := range names {
result = append(result, name)
}
return result
}
func (p Posts) Len() int { return len(p) }
func (p Posts) Less(i, j int) bool {
iDate := p[i].Date
jDate := p[j].Date
return iDate.Unix() < jDate.Unix()
}
func (p Posts) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
// LoadPosts loads posts for a given directory.
func LoadPosts(path string, prepend string) (Posts, error) {
type postFM struct {
Title string
Date string
Series string
Tags []string
SlidesLink string `yaml:"slides_link"`
Image string
Thumb string
}
var result Posts
err := filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
fin, err := os.Open(path)
if err != nil {
return err
}
defer fin.Close()
content, err := ioutil.ReadAll(fin)
if err != nil {
return err
}
var fm postFM
remaining, err := front.Unmarshal(content, &fm)
if err != nil {
return err
}
output := blackfriday.Run(remaining)
const timeFormat = `2006-01-02`
date, err := time.Parse(timeFormat, fm.Date)
if err != nil {
return err
}
fname := filepath.Base(path)
fname = strings.TrimSuffix(fname, filepath.Ext(fname))
p := Post{
Title: fm.Title,
Date: date,
DateString: fm.Date,
Link: filepath.Join(prepend, fname),
Body: string(remaining),
BodyHTML: template.HTML(output),
SlidesLink: fm.SlidesLink,
Series: fm.Series,
Tags: fm.Tags,
ImageURL: fm.Image,
ThumbURL: fm.Thumb,
}
result = append(result, p)
return nil
})
if err != nil {
return nil, err
}
sort.Sort(sort.Reverse(result))
return result, nil
}
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