gitblog1
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294
internal/templates/manager.go
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294
internal/templates/manager.go
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package templates
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import (
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"bytes"
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"fmt"
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"html/template"
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"strings"
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"time"
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"gitblog/internal/content"
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)
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type Manager struct {
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templates map[string]*template.Template
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funcMap template.FuncMap
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}
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type PageData struct {
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Title string
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Content template.HTML
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Posts []*content.Post
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Post *content.Post
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Page *content.Page
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Navigation []content.Navigation
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Categories []string
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Theme string
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CurrentYear int
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Meta map[string]string
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}
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func NewManager() *Manager {
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funcMap := template.FuncMap{
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"formatDate": formatDate,
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"formatDateTime": formatDateTime,
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"truncate": truncate,
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"safeHTML": safeHTML,
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"join": strings.Join,
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"contains": strings.Contains,
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"hasPrefix": strings.HasPrefix,
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"hasSuffix": strings.HasSuffix,
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"toLower": strings.ToLower,
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"toUpper": strings.ToUpper,
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"title": strings.Title,
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"now": time.Now,
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}
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return &Manager{
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templates: make(map[string]*template.Template),
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funcMap: funcMap,
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}
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}
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func (m *Manager) LoadTemplates() error {
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templates := []string{
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"base",
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"home",
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"post",
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"page",
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"category",
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"404",
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}
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for _, name := range templates {
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if err := m.loadTemplate(name); err != nil {
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return fmt.Errorf("failed to load template %s: %w", name, err)
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}
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}
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return nil
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}
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func (m *Manager) loadTemplate(name string) error {
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baseTemplate := m.getBaseTemplate()
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pageTemplate := m.getPageTemplate(name)
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tmpl, err := template.New(name).Funcs(m.funcMap).Parse(baseTemplate + pageTemplate)
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if err != nil {
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return err
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}
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m.templates[name] = tmpl
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return nil
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}
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func (m *Manager) Render(templateName string, data PageData) (string, error) {
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tmpl, exists := m.templates[templateName]
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if !exists {
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return "", fmt.Errorf("template %s not found", templateName)
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}
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var buf bytes.Buffer
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if err := tmpl.Execute(&buf, data); err != nil {
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return "", err
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}
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return buf.String(), nil
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}
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func (m *Manager) getBaseTemplate() string {
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return `<!DOCTYPE html>
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<html lang="en" data-theme="{{.Theme}}">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>{{if .Title}}{{.Title}} - {{end}}GitBlog</title>
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<meta name="description" content="{{if .Meta.description}}{{.Meta.description}}{{else}}A modern blog powered by GitHub{{end}}">
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<link rel="stylesheet" href="/static/css/style.css">
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">
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</head>
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<body>
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<div class="container">
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<header class="header">
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<nav class="nav">
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<div class="nav-brand">
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<a href="/" class="nav-logo">GitBlog</a>
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</div>
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<div class="nav-menu">
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{{range .Navigation}}
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<a href="{{.URL}}" class="nav-link">{{.Title}}</a>
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{{end}}
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</div>
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<div class="nav-actions">
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<button id="theme-toggle" class="theme-toggle" aria-label="Toggle theme">
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<span class="theme-icon">🌙</span>
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</button>
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</div>
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</nav>
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</header>
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<main class="main">
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{{template "content" .}}
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</main>
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<footer class="footer">
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<div class="footer-content">
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<p>© {{.CurrentYear}} GitBlog. Powered by GitHub.</p>
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<div class="footer-links">
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<a href="https://github.com" target="_blank" rel="noopener">GitHub</a>
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<a href="/rss.xml" target="_blank" rel="noopener">RSS</a>
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</div>
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</div>
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</footer>
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</div>
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<script src="/static/js/theme.js"></script>
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<script src="/static/js/main.js"></script>
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</body>
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</html>`
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}
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func (m *Manager) getPageTemplate(name string) string {
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templates := map[string]string{
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"home": `{{define "content"}}
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<div class="hero">
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<h1 class="hero-title">Welcome to GitBlog</h1>
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<p class="hero-subtitle">A modern blog powered by GitHub</p>
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</div>
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<div class="posts-grid">
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{{range .Posts}}
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<article class="post-card">
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<div class="post-meta">
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<time class="post-date">{{.Date | formatDate}}</time>
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{{if .Categories}}
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<span class="post-categories">
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{{range .Categories}}
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<span class="category-tag">{{.}}</span>
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{{end}}
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</span>
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{{end}}
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</div>
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<h2 class="post-title">
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<a href="/post/{{.Slug}}">{{.Title}}</a>
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</h2>
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<div class="post-excerpt">{{.Excerpt | safeHTML}}</div>
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<div class="post-tags">
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{{range .Tags}}
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<span class="tag">{{.}}</span>
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{{end}}
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</div>
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</article>
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{{end}}
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</div>
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{{end}}`,
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"post": `{{define "content"}}
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<article class="post">
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<header class="post-header">
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<h1 class="post-title">{{.Post.Title}}</h1>
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<div class="post-meta">
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<time class="post-date">{{.Post.Date | formatDateTime}}</time>
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{{if .Post.Categories}}
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<div class="post-categories">
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{{range .Post.Categories}}
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<a href="/category/{{. | toLower}}" class="category-link">{{.}}</a>
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{{end}}
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</div>
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{{end}}
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</div>
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</header>
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<div class="post-content">
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{{.Post.HTML | safeHTML}}
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</div>
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{{if .Post.Tags}}
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<footer class="post-footer">
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<div class="post-tags">
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{{range .Post.Tags}}
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<span class="tag">{{.}}</span>
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{{end}}
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</div>
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</footer>
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{{end}}
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</article>
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{{end}}`,
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"page": `{{define "content"}}
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<article class="page">
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<header class="page-header">
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<h1 class="page-title">{{.Page.Title}}</h1>
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</header>
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<div class="page-content">
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{{.Page.HTML | safeHTML}}
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</div>
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</article>
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{{end}}`,
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"category": `{{define "content"}}
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<div class="category-header">
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<h1 class="category-title">Category: {{.Title}}</h1>
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<p class="category-description">Posts in this category</p>
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</div>
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<div class="posts-grid">
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{{range .Posts}}
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<article class="post-card">
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<div class="post-meta">
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<time class="post-date">{{.Date | formatDate}}</time>
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{{if .Categories}}
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<span class="post-categories">
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{{range .Categories}}
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<span class="category-tag">{{.}}</span>
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{{end}}
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</span>
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{{end}}
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</div>
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<h2 class="post-title">
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<a href="/post/{{.Slug}}">{{.Title}}</a>
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</h2>
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<div class="post-excerpt">{{.Excerpt | safeHTML}}</div>
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<div class="post-tags">
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{{range .Tags}}
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<span class="tag">{{.}}</span>
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{{end}}
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</div>
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</article>
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{{end}}
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</div>
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{{end}}`,
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"404": `{{define "content"}}
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<div class="error-page">
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<h1 class="error-title">404</h1>
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<p class="error-message">Page not found</p>
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<a href="/" class="error-link">Go back home</a>
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</div>
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{{end}}`,
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}
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return templates[name]
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}
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func formatDate(t time.Time) string {
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return t.Format("January 2, 2006")
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}
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func formatDateTime(t time.Time) string {
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return t.Format("January 2, 2006 at 3:04 PM")
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}
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func truncate(s string, length int) string {
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if len(s) <= length {
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return s
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}
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return s[:length] + "..."
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}
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func safeHTML(s string) template.HTML {
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return template.HTML(s)
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}
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