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package main
import (
"os"
"regexp"
"sort"
"strings"
)
// Post struct contains necessary data for a post
type Post struct {
FileName string
Title string
Date string
Tags []string
Image string
}
// Posts stuct contains a collection of type Post
type Posts struct {
Contents []*Post
}
// Read all found files and load them into a stuct
func (app *application) aggregate(location string) (p *Posts, err error) {
var posts []*Post
files, err := os.ReadDir(location)
if err != nil {
return nil, err
}
// Loop over every file in the directory and read the contents.
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
}
posts = append(posts, newPost)
}
}
sort.Slice(posts, func(i, j int) bool {
return posts[i].Date > posts[j].Date
})
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 post *Post = new(Post)
fileName := strings.TrimSuffix(strings.Split(location, "/")[2], ".tmpl.html")
// title
title := strings.ReplaceAll(fileName, "_", " ")
// date
datePattern := regexp.MustCompile(`{{define "uploaded-on"}}(\d{4}-\d{2}-\d{2}){{end}}`)
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}}`)
matchingTags := tagsPattern.FindStringSubmatch(string(fileContent))
var tags []string
if len(matchingTags) > 1 {
tags = strings.Fields(matchingTags[1])
} else {
tags = []string{}
}
// thumbnail image
imagePattern := regexp.MustCompile(`<img src="(.+)" class="mainImage"( alt="(.+)")* />`)
matchingImage := imagePattern.FindStringSubmatch(string(fileContent))
var image string
if len(matchingImage) > 1 {
image = matchingImage[0]
} else {
image = ""
}
post.FileName = fileName
post.Title = title
post.Date = date
post.Tags = tags
post.Image = image
return post, nil
}
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