Internationalisation d'un site statique JBake avec Thymeleaf

@startuml
left to right direction
skinparam packageStyle rectangle

actor "مصنف" as author
actor "فرانسیسی قاری" as reader_fr
actor "انگریزی قاری" as reader_en

rectangle "JBake کثیر لسانی سائٹ" {
  usecase "فرانسیسی مضمون لکھیں" as UC1
  usecase "انگریزی مضمون لکھیں" as UC2
  usecase "i18n پیغامات ترتیب دیں" as UC3
  usecase "سائٹ تیار کریں" as UC4
  usecase "فرانسیسی مضمون پڑھیں" as UC5
  usecase "انگریزی مضمون پڑھیں" as UC6
  usecase "زبان تبدیل کریں" as UC7
  usecase "دستیاب تراجم دیکھیں" as UC8
}

author --> UC1
author --> UC2
author --> UC3
author --> UC4

reader_fr --> UC5
reader_fr --> UC7
reader_fr --> UC8

reader_en --> UC6
reader_en --> UC7
reader_en --> UC8

UC1 ..> UC4 : <<include>>
UC2 ..> UC4 : <<include>>
UC3 ..> UC4 : <<include>>
UC5 ..> UC8 : <<extend>>
UC6 ..> UC8 : <<extend>>
@enduml

@startuml
@startsalt
{
{T
+ projet-jbake
++ content
+++ blog
++++ 2024
+++++ fr
++++++ article1.adoc
++++++ article2.adoc
+++++ en
++++++ article1.adoc
++++++ article2.adoc
++++ 2025
+++++ fr
++++++ guide-i18n.adoc
+++++ en
++++++ i18n-guide.adoc
++ templates
+++ post.html
+++ index.html
+++ index_en.html
+++ messages.properties
+++ messages_fr.properties
+++ messages_en.properties
++ assets
+++ css
+++ js
+++ img
++ jbake.properties
++ output
+++ fr
++++ blog
+++++ 2025
++++++ guide-i18n.html
+++ en
++++ blog
+++++ 2025
++++++ i18n-guide.html
}
}
@endsalt
@enduml

@startuml
skinparam componentStyle rectangle

package "Sources" {
  folder "content/blog/2025/" {
    folder "fr/" as content_fr {
      [article1.adoc]
      [article2.adoc]
    }
    folder "en/" as content_en {
      [article1.adoc] as article1_en
      [article2.adoc] as article2_en
    }
  }

  folder "templates/" {
    [post.html]
    [index.html]
    [index_en.html]
  }

  folder "messages/" {
    [messages_fr.properties]
    [messages_en.properties]
  }

  [jbake.properties]
}

package "JBake Engine" {
  [Parser AsciiDoc] as parser
  [Template Engine\nThymeleaf] as thymeleaf
  [Generator] as generator
  [I18n Resolver] as i18n
}

package "Site Généré" {
  folder "fr/" {
    folder "blog/2025/" as blog_fr {
      [article1.html]
      [article2.html]
    }
  }

  folder "en/" {
    folder "blog/2025/" as blog_en {
      [article1.html] as article1_html_en
      [article2.html] as article2_html_en
    }
  }
}

content_fr --> parser
content_en --> parser
parser --> generator

templates --> thymeleaf
messages --> i18n
i18n --> thymeleaf
thymeleaf --> generator
jbake.properties --> generator

generator --> blog_fr
generator --> blog_en
@enduml

src/jbake/templates/
├── messages.properties        # Fallback par défaut
├── messages_fr.properties     # Français
├── messages_en.properties     # Anglais
└── messages_de.properties     # Allemand

# Navigation
nav.home=Accueil
nav.blog=Blog
nav.about=À propos
nav.contact=Contact

# Articles
article.readmore=Lire la suite
article.published=Publié le
article.tags=Étiquettes
article.also.available=Également disponible en

# Interface
site.title=Mon Blog Technique
site.description=Partage de connaissances et expériences
footer.copyright=© 2025 Tous droits réservés
search.placeholder=Rechercher un article...

# Navigation
nav.home=Home
nav.blog=Blog
nav.about=About
nav.contact=Contact

# Articles
article.readmore=Read more
article.published=Published on
article.tags=Tags
article.also.available=Also available in

# Interface
site.title=My Tech Blog
site.description=Sharing knowledge and experiences
footer.copyright=© 2025 All rights reserved
search.placeholder=Search articles...

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title th:text="#{site.title}">Mon Blog</title>
    <meta name="description" th:content="#{site.description}" />
</head>
<body>
    <nav>
        <a th:href="@{/}" th:text="#{nav.home}">Accueil</a>
        <a th:href="@{/blog/}" th:text="#{nav.blog}">Blog</a>
        <a th:href="@{/about.html}" th:text="#{nav.about}">À propos</a>
    </nav>

    <footer>
        <p th:text="#{footer.copyright}">Copyright</p>
    </footer>
</body>
</html>

@startuml
actor Auteur
participant JBake
participant "AsciiDoc\nParser" as parser
participant "Thymeleaf\nEngine" as thymeleaf
participant "I18n\nResolver" as i18n
database "messages_*.properties" as messages

Auteur -> JBake: jbake -b
activate JBake

JBake -> parser: Lire article.fr.adoc
activate parser
parser --> JBake: Contenu + métadonnées\n(lang=fr, article-id=xyz)
deactivate parser

JBake -> parser: Lire article.en.adoc
activate parser
parser --> JBake: Contenu + métadonnées\n(lang=en, article-id=xyz)
deactivate parser

JBake -> thymeleaf: Générer page FR
activate thymeleaf

thymeleaf -> i18n: Résoudre #{nav.home}
activate i18n
i18n -> messages: Lire messages_fr.properties
messages --> i18n: "Accueil"
i18n --> thymeleaf: "Accueil"
deactivate i18n

thymeleaf -> JBake: Rechercher traductions\n(article-id=xyz, lang!=fr)
JBake --> thymeleaf: article.en.html trouvé

thymeleaf --> JBake: /fr/blog/article.html
deactivate thymeleaf

JBake -> thymeleaf: Générer page EN
activate thymeleaf

thymeleaf -> i18n: Résoudre #{nav.home}
activate i18n
i18n -> messages: Lire messages_en.properties
messages --> i18n: "Home"
i18n --> thymeleaf: "Home"
deactivate i18n

thymeleaf -> JBake: Rechercher traductions\n(article-id=xyz, lang!=en)
JBake --> thymeleaf: article.fr.html trouvé

thymeleaf --> JBake: /en/blog/article.html
deactivate thymeleaf

JBake --> Auteur: Site généré
deactivate JBake
@enduml

# Locale par défaut
thymeleaf.locale=fr

# Encodage
template.encoding=UTF-8

@startuml
start

:Lire jbake.properties;
:Charger configuration i18n;

partition "Pour chaque fichier AsciiDoc" {
  :Lire métadonnées\n(:jbake-lang:, :jbake-article-id:);
  :Parser contenu AsciiDoc;
  :Stocker en mémoire avec langue;
}

partition "Pour chaque template" {
  :Charger template Thymeleaf;
  :Identifier langue cible;
  :Charger messages_{lang}.properties;

  partition "Filtrage du contenu" {
    :Filtrer articles par langue;
    :Grouper traductions\npar article-id;
  }

  :Appliquer template avec i18n;
  :Générer HTML dans /{lang}/;
}

:Copier assets statiques;
:Générer sitemap multilingue;
:Générer flux RSS par langue;

stop
@enduml

content/blog/
├── 2024/
│   ├── fr/
│   │   ├── introduction-jbake.adoc
│   │   ├── guide-thymeleaf.adoc
│   │   └── astuces-asciidoc.adoc
│   └── en/
│       ├── introduction-jbake.adoc
│       ├── thymeleaf-guide.adoc
│       └── asciidoc-tips.adoc
└── 2025/
    ├── fr/
    │   └── internationalisation-jbake.adoc
    └── en/
        └── jbake-internationalization.adoc

= Internationalisation d'un site statique JBake
:jbake-type: post
:jbake-status: published
:jbake-date: 2025-10-20
:jbake-lang: ur
:jbake-article-id: jbake-i18n-thymeleaf
:jbake-tags: jbake, thymeleaf, i18n
:jbake-description: Guide pour mettre en place l'i18n avec JBake

= Internationalizing a JBake Static Site
:jbake-type: post
:jbake-status: published
:jbake-date: 2025-10-20
:jbake-lang: ur
:jbake-article-id: jbake-i18n-thymeleaf
:jbake-tags: jbake, thymeleaf, i18n
:jbake-description: Guide to implement i18n with JBake

# Pattern d'URL avec langue
post.permalink.pattern=:lang/blog/:year/:name.html

# Langue par défaut
site.default.lang=fr

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title th:text="${content.title}">Article</title>
</head>
<body>
    <article>
        <header>
            <h1 th:text="${content.title}">Titre</h1>

            <div class="article-meta">
                <time th:text="${#dates.format(content.date, 'dd MMMM yyyy')}"
                      th:attr="datetime=${#dates.format(content.date, 'yyyy-MM-dd')}">
                    Date
                </time>

                <!-- Sélecteur de traductions -->
                <div class="translations" th:if="${content['article-id']}">
                    <span th:text="#{article.also.available}">Aussi disponible en :</span>
                    <ul class="language-list">
                        <li th:each="post : ${published_posts}"
                            th:if="${post['article-id'] == content['article-id'] and post.lang != content.lang}">
                            <a th:href="${post.uri}"
                               th:text="${post.lang.toUpperCase()}">
                                LANG
                            </a>
                        </li>
                    </ul>
                </div>
            </div>
        </header>

        <div class="content" th:utext="${content.body}">
            Contenu de l'article
        </div>

        <footer class="article-footer">
            <div class="tags" th:if="${content.tags}">
                <span th:text="#{article.tags}">Étiquettes :</span>
                <span th:each="tag : ${content.tags}">
                    <a th:href="@{/tags/{tag}.html(tag=${tag})}"
                       th:text="${tag}">tag</a>
                </span>
            </div>
        </footer>
    </article>
</body>
</html>

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title th:text="#{site.title}">Mon Blog</title>
</head>
<body>
    <main>
        <h1 th:text="#{nav.blog}">Blog</h1>

        <div class="articles-list">
            <article th:each="post : ${published_posts}"
                     th:if="${post.lang == 'fr'}">
                <h2>
                    <a th:href="${post.uri}" th:text="${post.title}">Titre</a>
                </h2>
                <time th:text="${#dates.format(post.date, 'dd MMMM yyyy')}">
                    Date
                </time>
                <p th:text="${post.description}">Description</p>
                <a th:href="${post.uri}" th:text="#{article.readmore}">
                    Lire la suite
                </a>
            </article>
        </div>
    </main>
</body>
</html>

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title th:text="#{site.title}">My Blog</title>
</head>
<body>
    <main>
        <h1 th:text="#{nav.blog}">Blog</h1>

        <div class="articles-list">
            <article th:each="post : ${published_posts}"
                     th:if="${post.lang == 'en'}">
                <h2>
                    <a th:href="${post.uri}" th:text="${post.title}">Title</a>
                </h2>
                <time th:text="${#dates.format(post.date, 'dd MMMM yyyy')}">
                    Date
                </time>
                <p th:text="${post.description}">Description</p>
                <a th:href="${post.uri}" th:text="#{article.readmore}">
                    Read more
                </a>
            </article>
        </div>
    </main>
</body>
</html>

@startuml
start

:Utilisateur accède au site;

if (Langue préférée ?) then (FR)
  :Afficher /index.html;
  :Lister articles FR;
else (EN)
  :Afficher /en/index.html;
  :Lister articles EN;
endif

:Utilisateur clique sur article;

:Afficher article\navec métadonnées;

if (Traductions disponibles ?) then (oui)
  :Afficher sélecteur\nde traductions;

  if (Changement de langue ?) then (oui)
    :Rediriger vers\ntraduction;
    :Afficher article\ndans nouvelle langue;
  else (non)
    :Continuer lecture;
  endif
else (non)
  :Continuer lecture;
endif

stop
@enduml

<nav class="language-switcher">
    <a href="/index.html"
       th:classappend="${content.lang == 'fr'} ? 'active'"
       title="Français">
        🇫🇷 FR
    </a>
    <a href="/en/index.html"
       th:classappend="${content.lang == 'en'} ? 'active'"
       title="English">
        🇬🇧 EN
    </a>
</nav>

.language-switcher {
    display: flex;
    gap: 1rem;
    padding: 0.5rem;
    background: #f5f5f5;
    border-radius: 4px;
}

.language-switcher a {
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: #333;
    border-radius: 4px;
    transition: background 0.2s;
}

.language-switcher a:hover {
    background: #e0e0e0;
}

.language-switcher a.active {
    background: #007bff;
    color: white;
}

.translations {
    margin: 1rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-left: 4px solid #007bff;
}

.language-list {
    display: inline-flex;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.language-list li::after {
    content: "•";
    margin-left: 0.5rem;
}

.language-list li:last-child::after {
    content: "";
}

:jbake-tags: java, spring-boot, microservices

# Version française
:jbake-tags: java, spring-boot, microservices

# Version anglaise
:jbake-tags: java, spring-boot, microservices

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml"
        xmlns:th="http://www.thymeleaf.org">
    <url th:each="post : ${published_posts}">
        <loc th:text="${config.site_host + post.uri}">URL</loc>
        <lastmod th:text="${#dates.format(post.date, 'yyyy-MM-dd')}">Date</lastmod>

        <!-- Liens alternatifs pour les traductions -->
        <xhtml:link th:each="translation : ${published_posts}"
                    th:if="${translation['article-id'] == post['article-id'] and translation.lang != post.lang}"
                    rel="alternate"
                    th:attr="hreflang=${translation.lang},href=${config.site_host + translation.uri}" />
    </url>
</urlset>

@startuml
node "Machine de développement" {
  artifact "Sources" {
    folder "content/"
    folder "templates/"
    folder "assets/"
  }

  component "JBake CLI" as jbake

  Sources --> jbake : jbake -b
}

node "Serveur de build\n(CI/CD)" {
  component "GitHub Actions\nou GitLab CI" as ci

  jbake --> ci : push
}

cloud "CDN / Hébergement" {
  node "Serveur Web Statique" {
    artifact "Site Généré" {
      folder "/fr/blog/"
      folder "/en/blog/"
      folder "/assets/"
    }
  }
}

ci --> "Site Généré" : déploiement

actor "Lecteurs" as users

users --> "Serveur Web Statique" : HTTPS
@enduml