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website/articles/article.go

114 lines
2.2 KiB
Go

package articles
import (
"bytes"
"os"
"strings"
"time"
"git.phc.dm.unipi.it/phc/website/config"
"gopkg.in/yaml.v3"
)
type Article struct {
Id string
Title string
Description string
Tags []string
PublishDate time.Time
ArticlePath string
markdownSource string
renderedHTML string
}
func (article *Article) HasTag(tag string) bool {
for _, t := range article.Tags {
if t == tag {
return true
}
}
return false
}
func NewArticle(articlePath string) (*Article, error) {
article := &Article{
ArticlePath: articlePath,
}
err := article.load()
if err != nil {
return nil, err
}
return article, nil
}
func trimAll(vs []string) []string {
r := []string{}
for _, v := range vs {
r = append(r, strings.TrimSpace(v))
}
return r
}
func (article *Article) load() error {
fileBytes, err := os.ReadFile(article.ArticlePath)
if err != nil {
return err
}
source := string(fileBytes)
// TODO: Ehm bugia pare che esista "https://github.com/yuin/goldmark-meta" però non penso valga la pena aggiungerlo
parts := strings.SplitN(source, "---", 3)[1:]
frontMatterSource := parts[0]
markdownSource := parts[1]
var frontMatter struct {
Id string `yaml:"id"`
Title string `yaml:"title"`
Description string `yaml:"description"`
Tags string `yaml:"tags"`
PublishDate string `yaml:"publish_date"`
}
if err := yaml.Unmarshal([]byte(frontMatterSource), &frontMatter); err != nil {
return err
}
publishDate, err := time.Parse("2006/01/02 15:04", frontMatter.PublishDate)
if err != nil {
return err
}
article.Id = frontMatter.Id
article.Title = frontMatter.Title
article.Description = frontMatter.Description
article.Tags = trimAll(strings.Split(frontMatter.Tags, ","))
article.PublishDate = publishDate
article.markdownSource = markdownSource
article.renderedHTML = ""
return nil
}
func (article *Article) Render() (string, error) {
if config.Mode == "development" {
article.load()
}
if article.renderedHTML == "" {
var buf bytes.Buffer
if err := articleMarkdown.Convert([]byte(article.markdownSource), &buf); err != nil {
return "", err
}
article.renderedHTML = buf.String()
}
return article.renderedHTML, nil
}