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|
package main
import (
"os"
"regexp"
"sort"
"strings"
)
type Post struct {
FileName string
Title string
Date string
Tags []string
Image string
}
type Posts struct {
Contents []*Post
}
func (p Post) containsTag(filterTag string) bool {
if filterTag == "" {
return true
}
for _, tag := range p.Tags {
if filterTag == tag {
return true
}
}
return false
}
func (app *application) loadPosts(location string, postCount int) (p *Posts, err error) {
if postCount == 0 || postCount < -1 {
return nil, os.ErrInvalid
}
var posts []*Post
files, err := os.ReadDir(location)
if err != nil {
return nil, err
}
for _, file := range files {
if !file.IsDir() && strings.HasSuffix(file.Name(), ".tmpl.html") {
newPost, err := app.readFile(location + "/" + file.Name())
if err != nil {
return nil, err
}
/*
// filtering by tag
if !newPost.containsTag(filterTag) {
continue
} */
posts = append(posts, newPost)
}
}
sort.Slice(posts, func(i, j int) bool {
return posts[i].Date > posts[j].Date
})
if postCount == -1 {
return &Posts{Contents: posts}, nil
} else if postCount < len(posts) {
return &Posts{Contents: posts[:postCount]}, nil
} else {
return &Posts{Contents: posts}, nil
}
}
func (app *application) readFile(location string) (p *Post, err error) {
fileContent, err := os.ReadFile(location)
if err != nil {
return nil, err
}
var tmp *Post = new(Post)
fileName := strings.TrimSuffix(strings.Split(location, "/")[2], ".tmpl.html")
// title
title := strings.ReplaceAll(fileName, "_", " ")
// date
datePattern := regexp.MustCompile(`<time datetime="(\d{4}-\d{2}-\d{2})">`)
dateMatching := datePattern.FindStringSubmatch(string(fileContent))
var date string
if len(dateMatching) > 1 {
date = dateMatching[1]
} else {
date = ""
}
// tags
tagsPattern := regexp.MustCompile(`{{define "keywords"}}([\w\s]+){{end}}`)
tagsMatching := tagsPattern.FindStringSubmatch(string(fileContent))
var tags []string
if len(tagsMatching) > 1 {
tags = strings.Fields(tagsMatching[1])
} else {
tags = []string{}
}
// thumbnail image
imagePattern := regexp.MustCompile(`<img src="(.+)" class="mainImage"( alt="(.+)")* />`)
imageMatching := imagePattern.FindStringSubmatch(string(fileContent))
var image string
if len(imageMatching) > 1 {
image = imageMatching[0]
} else {
image = ""
}
tmp.FileName = fileName
tmp.Title = title
tmp.Date = date
tmp.Tags = tags
tmp.Image = image
return tmp, nil
}
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