Move to multifile system and prepare for new file format

1 files changed, 131 insertions, 0 deletions

diff --git a/load.go b/load.go
new file mode 100644
index 0000000..b6866e3
--- /dev/null
+++ b/load.go
@@ -0,0 +1,131 @@
+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 class="mainImage" src="(.+)"( 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
+
+}