From f51250941f4425ce4d63b90a266a29e8588a7d03 Mon Sep 17 00:00:00 2001
From: Ariel Costas Guerrero <ariel@costas.dev>
Date: Wed, 30 Apr 2025 08:56:43 +0200
Subject: Add tagging to articles

---
 src/pages/blog/[id].astro  |  61 +++++++++++
 src/pages/blog/index.astro | 265 ++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 312 insertions(+), 14 deletions(-)

(limited to 'src/pages/blog')

diff --git a/src/pages/blog/[id].astro b/src/pages/blog/[id].astro
index 65c8a25..935a796 100644
--- a/src/pages/blog/[id].astro
+++ b/src/pages/blog/[id].astro
@@ -61,7 +61,68 @@ const schema = {
     <time datetime={entry.data.publishedAt.toISOString()}>
       {formattedDate}
     </time>
+    {entry.data.tags && entry.data.tags.length > 0 && (
+      <>
+        • Etiquetas:
+        <ul class="tags">
+          {entry.data.tags.map((tag: string) => (
+            <li><a href={`/blog/?tag=${encodeURIComponent(tag)}`}>{tag}</a></li>
+          ))}
+        </ul>
+      </>
+    )}
   </small>
 
   <Content />
 </Layout>
+
+<style lang="scss">
+  @use "../../../styles/variables" as v;
+  @use "sass:color";
+
+  .tags {
+    display: inline-flex;
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    gap: 0.75rem;
+  }
+
+  .tags li {
+    display: inline;
+  }
+
+  .tags a {
+    // Estilo de enlace normal, siguiendo los estilos predefinidos en Layout.astro
+    color: v.$accentDark;
+    font-size: 0.85rem;
+    font-family: v.$monoFontStack;
+    text-decoration: none;
+    box-shadow: 0 1px v.$accent;
+    transition: all 0.2s ease;
+
+    &:hover {
+      box-shadow: 0 2px v.$accentDark;
+    }
+
+    &:focus {
+      color: v.$accentDark;
+      outline: none;
+      background-color: v.$secondary;
+      box-shadow: 0 4px #0b0c0c;
+    }
+  }
+
+  /* Estilos para la información de la publicación */
+  small {
+    display: block;
+    margin-top: -1rem;
+    margin-bottom: 1.5rem;
+    font-size: 0.85rem;
+    color: color.adjust(v.$dark, $lightness: 30%);
+  }
+
+  time {
+    font-style: italic;
+  }
+</style>
diff --git a/src/pages/blog/index.astro b/src/pages/blog/index.astro
index 68ad02e..b74781b 100644
--- a/src/pages/blog/index.astro
+++ b/src/pages/blog/index.astro
@@ -6,6 +6,7 @@ const blogCollection = (await getCollection("blog")).sort((a, b) => {
   return b.data.publishedAt.getTime() - a.data.publishedAt.getTime();
 });
 
+// Agrupar artículos por fecha
 const groupedPosts = blogCollection.reduce(
   (acc: Record<string, any[]>, post) => {
     const year = post.data.publishedAt.getFullYear();
@@ -20,6 +21,9 @@ const groupedPosts = blogCollection.reduce(
   {},
 );
 
+// Colección de todas las etiquetas únicas
+const allTags = [...new Set(blogCollection.flatMap(post => post.data.tags || []))].sort();
+
 function humaniseDate(date: Date) {
   const result = date.toLocaleDateString("es-ES", {
     month: "long",
@@ -64,18 +68,251 @@ const schema = {
     son mías, y no representan a ninguna empresa o institución.
   </p>
 
-  {
-    Object.entries(groupedPosts).map(([key, posts]) => (
-      <section>
-        <h2>{humaniseDate(new Date(key))}</h2>
-        <ul>
-          {posts.map((post) => (
-            <li>
-              <a href={`/blog/${post.id}`}>{post.data.title}</a>
-            </li>
-          ))}
-        </ul>
-      </section>
-    ))
-  }
+  {allTags.length > 0 && (
+    <div class="tags-container">
+      <h2>Etiquetas</h2>
+      <div class="tag-filter">
+        <button class="tag-button active" data-tag="all">Todas</button>
+        {allTags.map((tag) => (
+          <button class="tag-button" data-tag={tag}>{tag}</button>
+        ))}
+      </div>
+    </div>
+  )}
+
+  <div id="blog-posts">
+    {
+      Object.entries(groupedPosts).map(([key, posts]) => (
+        <section class="post-section" data-date={key}>
+          <h2>{humaniseDate(new Date(key))}</h2>
+          <ul>
+            {posts.map((post) => {
+              const postTags = post.data.tags || [];
+              const tagsAttribute = postTags.join(',');
+              return (
+                <li class="post-item" data-tags={tagsAttribute}>
+                  <a href={`/blog/${post.id}`}>{post.data.title}</a>
+                  {postTags.length > 0 && (
+                    <ul class="post-tags">
+                      {postTags.map((tag: string) => (
+                        <li>
+                          <button class="tag-link" data-tag={tag}>
+                            {tag}
+                          </button>
+                        </li>
+                      ))}
+                    </ul>
+                  )}
+                </li>
+              );
+            })}
+          </ul>
+        </section>
+      ))
+    }
+  </div>
+
+  <script>
+    // Script para el filtrado de artículos por etiqueta
+    document.addEventListener('DOMContentLoaded', () => {
+      const tagButtons = document.querySelectorAll('.tag-button');
+      const tagLinks = document.querySelectorAll('.tag-link');
+      const postItems = document.querySelectorAll('.post-item');
+      const postSections = document.querySelectorAll('.post-section');
+
+      // Función para filtrar los artículos por etiqueta
+      function filterByTag(tag: string) {
+        // Primero, restablecer la visibilidad de todos los elementos
+        postItems.forEach(item => {
+          (item as HTMLElement).style.display = '';
+        });
+        postSections.forEach(section => {
+          (section as HTMLElement).style.display = '';
+        });
+
+        // Si no es 'todas', filtrar por etiqueta
+        if (tag !== 'all') {
+          postItems.forEach(item => {
+            const itemEl = item as HTMLElement;
+            const tagsAttr = itemEl.dataset.tags || '';
+            const itemTags = tagsAttr ? tagsAttr.split(',') : [];
+            if (!itemTags.includes(tag)) {
+              itemEl.style.display = 'none';
+            }
+          });
+
+          // Ocultar secciones que no tienen artículos visibles
+          postSections.forEach(section => {
+            const items = section.querySelectorAll('.post-item');
+            let allHidden = true;
+
+            items.forEach(item => {
+              if ((item as HTMLElement).style.display !== 'none') {
+                allHidden = false;
+              }
+            });
+
+            if (allHidden) {
+              (section as HTMLElement).style.display = 'none';
+            }
+          });
+        }
+
+        // Actualizar estado activo de los botones
+        tagButtons.forEach(button => {
+          if ((button as HTMLElement).dataset.tag === tag) {
+            button.classList.add('active');
+          } else {
+            button.classList.remove('active');
+          }
+        });
+
+        // Actualizar URL con el parámetro de consulta
+        if (tag === 'all') {
+          history.replaceState(null, document.title, window.location.pathname);
+        } else {
+          history.replaceState(null, document.title, `?tag=${encodeURIComponent(tag)}`);
+        }
+
+        // Añadir un log para depuración
+        console.log(`Filtrado por etiqueta: ${tag}`);
+        console.log(`Artículos visibles: ${document.querySelectorAll('.post-item:not([style*="display: none"])')?.length || 0}`);
+      }
+
+      // Eventos de clic para los botones de etiquetas
+      tagButtons.forEach(button => {
+        button.addEventListener('click', () => {
+          const tag = (button as HTMLElement).dataset.tag;
+          if (tag) filterByTag(tag);
+        });
+      });
+
+      // Eventos de clic para los enlaces de etiquetas dentro de los posts
+      tagLinks.forEach(link => {
+        link.addEventListener('click', (e) => {
+          e.preventDefault();
+          const tag = (link as HTMLElement).dataset.tag;
+          if (tag) filterByTag(tag);
+
+          // Desplazamiento suave hacia arriba para ver todos los resultados
+          const tagsContainer = document.querySelector('.tags-container');
+          if (tagsContainer) {
+            window.scrollTo({
+              top: (tagsContainer as HTMLElement).offsetTop - 20,
+              behavior: 'smooth'
+            });
+          }
+        });
+      });
+
+      // Verificar si hay un parámetro de consulta para filtrar
+      const urlParams = new URLSearchParams(window.location.search);
+      const tagParam = urlParams.get('tag');
+
+      if (tagParam) {
+        const tagExists = Array.from(tagButtons).some(button =>
+          (button as HTMLElement).dataset.tag === tagParam
+        );
+        if (tagExists) {
+          filterByTag(tagParam);
+        }
+      }
+    });
+  </script>
 </Layout>
+
+<style lang="scss">
+  @use "../../../styles/variables" as v;
+  @use "sass:color";
+
+  .tags-container {
+    margin-bottom: 2rem;
+  }
+
+  .tag-filter {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.5rem;
+    margin-bottom: 1.5rem;
+  }
+
+  .tag-button {
+    padding: 0.25rem 0.6rem;
+    background-color: v.$light;
+    color: v.$accent;
+    border: 1px solid v.$accent;
+    border-radius: 1.5rem;
+    font-size: 0.85rem;
+    font-family: v.$monoFontStack;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    box-shadow: v.$shadow;
+
+    &:hover {
+      background-color: color.adjust(v.$accent, $lightness: 45%);
+      color: v.$accentDark;
+      transform: translateY(-1px);
+    }
+
+    &.active {
+      background-color: v.$accent;
+      color: v.$lightAlt;
+      border-color: v.$accentDark;
+    }
+  }
+
+  .post-tags {
+    display: inline-flex;
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    gap: 0.25rem;
+    margin-left: 0.5rem;
+  }
+
+  .post-tags li {
+    display: inline;
+  }
+
+  .tag-link {
+    display: inline-block;
+    padding: 0.1rem 0.4rem;
+    background-color: color.adjust(v.$background, $lightness: -3%);
+    color: v.$accentDark;
+    border: none;
+    border-radius: 1rem;
+    font-size: 0.75rem;
+    font-family: v.$monoFontStack;
+    text-decoration: none;
+    cursor: pointer;
+    transition: all 0.2s ease;
+
+    &:hover {
+      background-color: color.adjust(v.$accent, $lightness: 45%);
+      color: v.$accentDark;
+      transform: translateY(-1px);
+    }
+  }
+
+  /* Efecto de transición para el filtrado */
+  .post-item {
+    transition: all 0.3s ease;
+  }
+
+  .post-section {
+    transition: opacity 0.3s ease;
+  }
+
+  #blog-posts {
+    min-height: 200px;
+  }
+
+  /* Mejora el aspecto de los enlaces de posts */
+  .post-item {
+    margin-bottom: 0.5rem;
+
+    a {
+      font-weight: 500;
+    }
+  }
+</style>
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