feature(integration): support social cards for blog plugin posts (#326)

This PR improves the Material Social Cards plugin integration by adding
support for social cards generated for Material Blog plugin posts
(https://squidfunk.github.io/mkdocs-material/plugins/blog/).

mkdocs_rss_plugin/integrations/theme_material_social_plugin.py

@@ -21,9 +21,13 @@
 # conditional
 try:
     from material import __version__ as material_version
+    from material.plugins.blog.plugin import BlogPlugin
+    from pymdownx.slugs import slugify
+
 except ImportError:
     material_version = None
 
+
 # ############################################################################
 # ########## Globals #############
 # ################################
@@ -38,6 +42,7 @@
 class IntegrationMaterialSocialCards:
     # attributes
     IS_ENABLED: bool = True
+    IS_BLOG_PLUGIN_ENABLED: bool = True
     IS_SOCIAL_PLUGIN_ENABLED: bool = True
     IS_SOCIAL_PLUGIN_CARDS_ENABLED: bool = True
     IS_THEME_MATERIAL: bool = False
@@ -53,6 +58,7 @@ def __init__(self, mkdocs_config: MkDocsConfig, switch_force: bool = True) -> No
                 it to False to disable it even if Social Cards are enabled in Mkdocs
                 configuration. Defaults to True.
         """
+        self.mkdocs_config = mkdocs_config
         # check if the integration can be enabled or not
         self.IS_SOCIAL_PLUGIN_CARDS_ENABLED = (
             self.is_social_plugin_and_cards_enabled_mkdocs(mkdocs_config=mkdocs_config)
@@ -85,6 +91,9 @@ def __init__(self, mkdocs_config: MkDocsConfig, switch_force: bool = True) -> No
             self.social_cards_cache_dir = self.get_social_cards_cache_dir(
                 mkdocs_config=mkdocs_config
             )
+            self.IS_BLOG_PLUGIN_ENABLED = self.is_blog_plugin_enabled_mkdocs(
+                mkdocs_config=mkdocs_config
+            )
             if self.is_mkdocs_theme_material_insiders():
                 self.load_cache_cards_manifest()
 
@@ -123,6 +132,37 @@ def is_mkdocs_theme_material_insiders(self) -> Optional[bool]:
             self.IS_INSIDERS = False
             return False
 
+    def is_blog_plugin_enabled_mkdocs(self, mkdocs_config: MkDocsConfig) -> bool:
+        """Check if blog plugin is installed and enabled.
+
+        Args:
+            mkdocs_config (MkDocsConfig): Mkdocs website configuration object.
+
+        Returns:
+            bool: True if the theme material and the plugin blog is enabled.
+        """
+        if not self.is_mkdocs_theme_material(mkdocs_config=mkdocs_config):
+            logger.debug("Installed theme is not 'material'. Integration disabled.")
+            return False
+
+        if not mkdocs_config.plugins.get("material/blog"):
+            logger.debug("Material blog plugin is not listed in configuration.")
+            self.IS_BLOG_PLUGIN_ENABLED = False
+            return False
+
+        self.blog_plugin_cfg: BlogPlugin | None = mkdocs_config.plugins.get(
+            "material/blog"
+        )
+
+        if not self.blog_plugin_cfg.config.enabled:
+            logger.debug("Material blog plugin is installed but disabled.")
+            self.IS_BLOG_PLUGIN_ENABLED = False
+            return False
+
+        logger.debug("Material blog plugin is enabled in Mkdocs configuration.")
+        self.IS_BLOG_PLUGIN_ENABLED = True
+        return True
+
     def is_social_plugin_enabled_mkdocs(self, mkdocs_config: MkDocsConfig) -> bool:
         """Check if social plugin is installed and enabled.
 
@@ -274,18 +314,29 @@ def get_social_card_build_path_for_page(
         if mkdocs_site_dir is None and self.mkdocs_site_build_dir:
             mkdocs_site_dir = self.mkdocs_site_build_dir
 
-        expected_built_card_path = Path(
-            f"{mkdocs_site_dir}/{self.social_cards_assets_dir}/"
-            f"{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
-        )
+        # if page is a blog post
+        if self.IS_BLOG_PLUGIN_ENABLED and Path(
+            mkdocs_page.file.src_uri
+        ).is_relative_to(self.blog_plugin_cfg.config.blog_dir):
+            expected_built_card_path = Path(
+                f"{mkdocs_site_dir}/{self.social_cards_assets_dir}/"
+                f"{Path(mkdocs_page.file.dest_uri).parent}.png"
+            )
+        else:
+            expected_built_card_path = Path(
+                f"{mkdocs_site_dir}/{self.social_cards_assets_dir}/"
+                f"{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
+            )
 
         if expected_built_card_path.is_file():
             logger.debug(
-                f"Social card file found in cache folder: {expected_built_card_path}"
+                f"Social card file found in build folder: {expected_built_card_path}"
             )
             return expected_built_card_path
         else:
-            logger.debug(f"Not found: {expected_built_card_path}")
+            logger.debug(
+                f"Social card not found in build folder: {expected_built_card_path}"
+            )
             return None
 
     def get_social_card_cache_path_for_page(self, mkdocs_page: Page) -> Optional[Path]:
@@ -305,16 +356,28 @@ def get_social_card_cache_path_for_page(self, mkdocs_page: Page) -> Optional[Pat
             Path: path to the image in local cache folder if it exists
         """
         if self.IS_INSIDERS:
-            expected_cached_card_path = self.social_cards_cache_dir.joinpath(
-                f"assets/images/social/{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
-            )
+
+            # if page is a blog post
+            if self.IS_BLOG_PLUGIN_ENABLED and Path(
+                mkdocs_page.file.src_uri
+            ).is_relative_to(self.blog_plugin_cfg.config.blog_dir):
+                expected_cached_card_path = self.social_cards_cache_dir.joinpath(
+                    f"assets/images/social/{Path(mkdocs_page.file.dest_uri).parent}.png"
+                )
+            else:
+                expected_cached_card_path = self.social_cards_cache_dir.joinpath(
+                    f"assets/images/social/{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
+                )
+
             if expected_cached_card_path.is_file():
                 logger.debug(
                     f"Social card file found in cache folder: {expected_cached_card_path}"
                 )
                 return expected_cached_card_path
             else:
-                logger.debug(f"Not found: {expected_cached_card_path}")
+                logger.debug(
+                    f"Social card not found in cache folder: {expected_cached_card_path}"
+                )
 
         else:
             if "description" in mkdocs_page.meta:
@@ -362,4 +425,18 @@ def get_social_card_url_for_page(
         if mkdocs_site_url is None and self.mkdocs_site_url:
             mkdocs_site_url = self.mkdocs_site_url
 
-        return f"{mkdocs_site_url}assets/images/social/{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
+        # if page is a blog post
+        if self.IS_BLOG_PLUGIN_ENABLED and Path(
+            mkdocs_page.file.src_uri
+        ).is_relative_to(self.blog_plugin_cfg.config.blog_dir):
+            page_social_card = (
+                f"{mkdocs_site_url}assets/images/social/"
+                f"{Path(mkdocs_page.file.dest_uri).parent}.png"
+            )
+        else:
+            page_social_card = (
+                f"{mkdocs_site_url}assets/images/social/"
+                f"{Path(mkdocs_page.file.src_uri).with_suffix('.png')}"
+            )
+
+        return page_social_card

tests/fixtures/docs/blog/.authors.yml

@@ -0,0 +1,15 @@
+authors:
+  squidfunk:
+    name: Martin Donath
+    description: Creator
+    avatar: https://github.com/squidfunk.png
+  alexvoss:
+    name: Alex Voss
+    description: Weltenwanderer
+    avatar: https://github.com/alexvoss.png
+  guts:
+    avatar: https://cdn.geotribu.fr/img/internal/contributeurs/jmou.jfif
+    description: GIS Watchman
+    name: Julien Moura
+    slug: julien-moura
+    url: https://geotribu.fr/team/julien-moura/

tests/fixtures/docs/blog/index.md

@@ -0,0 +1,2 @@
+# Blog
+

tests/fixtures/docs/blog/posts/firstpost.md

@@ -0,0 +1,32 @@
+---
+authors: 
+  - alexvoss
+date: 2023-10-11
+categories:
+  - meta
+---
+
+# My first blog post
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque nec
+maximus ex. Sed consequat, nulla quis malesuada dapibus, elit metus vehicula
+erat, ut egestas tellus eros at risus. In hac habitasse platea dictumst.
+Phasellus id lacus pulvinar erat consequat pretium. Morbi malesuada arcu mauris
+Nam vel justo sem. Nam placerat purus non varius luctus. Integer pretium leo in
+sem rhoncus, quis gravida orci mollis. Proin id aliquam est. Vivamus in nunc ac
+metus tristique pellentesque. Suspendisse viverra urna in accumsan aliquet.
+
+<!-- more -->
+
+Donec volutpat, elit ac volutpat laoreet, turpis dolor semper nibh, et dictum
+massa ex pulvinar elit. Curabitur commodo sit amet dolor sed mattis. Etiam
+tempor odio eu nisi gravida cursus. Maecenas ante enim, fermentum sit amet
+molestie nec, mollis ac libero. Vivamus sagittis suscipit eros ut luctus.
+
+Nunc vehicula sagittis condimentum. Cras facilisis bibendum lorem et feugiat.
+In auctor accumsan ligula, at consectetur erat commodo quis. Morbi ac nunc
+pharetra, pellentesque risus in, consectetur urna. Nulla id enim facilisis
+arcu tincidunt pulvinar. Vestibulum laoreet risus scelerisque porta congue.
+In velit purus, dictum quis neque nec, molestie viverra risus. Nam pellentesque
+tellus id elit ultricies, vel finibus erat cursus.
+

tests/fixtures/docs/blog/posts/secondpost.md

@@ -0,0 +1,32 @@
+---
+authors: 
+  - squidfunk
+date: 2023-10-12
+categories:
+  - hello
+---
+
+# A second post
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque nec
+maximus ex. Sed consequat, nulla quis malesuada dapibus, elit metus vehicula
+erat, ut egestas tellus eros at risus. In hac habitasse platea dictumst.
+Phasellus id lacus pulvinar erat consequat pretium. Morbi malesuada arcu mauris
+Nam vel justo sem. Nam placerat purus non varius luctus. Integer pretium leo in
+sem rhoncus, quis gravida orci mollis. Proin id aliquam est. Vivamus in nunc ac
+metus tristique pellentesque. Suspendisse viverra urna in accumsan aliquet.
+
+<!-- more -->
+
+Donec volutpat, elit ac volutpat laoreet, turpis dolor semper nibh, et dictum
+massa ex pulvinar elit. Curabitur commodo sit amet dolor sed mattis. Etiam
+tempor odio eu nisi gravida cursus. Maecenas ante enim, fermentum sit amet
+molestie nec, mollis ac libero. Vivamus sagittis suscipit eros ut luctus.
+
+Nunc vehicula sagittis condimentum. Cras facilisis bibendum lorem et feugiat.
+In auctor accumsan ligula, at consectetur erat commodo quis. Morbi ac nunc
+pharetra, pellentesque risus in, consectetur urna. Nulla id enim facilisis
+arcu tincidunt pulvinar. Vestibulum laoreet risus scelerisque porta congue.
+In velit purus, dictum quis neque nec, molestie viverra risus. Nam pellentesque
+tellus id elit ultricies, vel finibus erat cursus.
+

tests/fixtures/mkdocs_item_image_social_cards_blog.yml

@@ -0,0 +1,14 @@
+site_name: Test RSS Plugin
+site_description: Test social cards support in RSS with blog plugin also enabled
+site_url: https://guts.github.io/mkdocs-rss-plugin
+
+plugins:
+    - blog:
+          blog_dir: blog
+    - rss
+    - social:
+          enabled: true
+          cards: true
+
+theme:
+    name: material

tests/test_build.py

@@ -398,8 +398,13 @@ def test_simple_build_item_length_unlimited(self):
                 if feed_item.title not in (
                     "Page without meta with short text",
                     "Blog sample",
+                    "Blog",
                 ):
-                    self.assertGreater(len(feed_item.description), 150, feed_item.title)
+                    self.assertGreater(
+                        len(feed_item.description),
+                        150,
+                        f"Failed item title: {feed_item.title}",
+                    )
 
     def test_simple_build_item_delimiter(self):
         with tempfile.TemporaryDirectory() as tmpdirname:

tests/test_config.py

@@ -41,7 +41,7 @@ class TestConfig(BaseTest):
     @classmethod
     def setUpClass(cls):
         """Executed when module is loaded before any test."""
-        cls.config_files = sorted(Path("tests/fixtures/").glob("**/*.yml"))
+        cls.config_files = sorted(Path("tests/fixtures/").glob("**/mkdocs_*.yml"))
         cls.feed_image = "https://upload.wikimedia.org/wikipedia/commons/thumb/4/43/Feed-icon.svg/128px-Feed-icon.svg.png"
 
     def setUp(self):

tests/test_integrations_material_social_cards.py

@@ -117,6 +117,23 @@ def test_plugin_config_social_plugin_enabled_but_cards_disabled(self):
         self.assertFalse(integration_social_cards.IS_SOCIAL_PLUGIN_CARDS_ENABLED)
         self.assertFalse(integration_social_cards.IS_ENABLED)
 
+    def test_plugin_config_social_cards_enabled_with_blog_plugin(self):
+        # default reference
+        cfg_mkdocs = load_config(
+            str(
+                Path("tests/fixtures/mkdocs_item_image_social_cards_blog.yml").resolve()
+            )
+        )
+
+        integration_social_cards = IntegrationMaterialSocialCards(
+            mkdocs_config=cfg_mkdocs
+        )
+        self.assertTrue(integration_social_cards.IS_THEME_MATERIAL)
+        self.assertTrue(integration_social_cards.IS_SOCIAL_PLUGIN_ENABLED)
+        self.assertTrue(integration_social_cards.IS_SOCIAL_PLUGIN_CARDS_ENABLED)
+        self.assertTrue(integration_social_cards.IS_BLOG_PLUGIN_ENABLED)
+        self.assertTrue(integration_social_cards.IS_ENABLED)
+
     def test_simple_build(self):
         with tempfile.TemporaryDirectory() as tmpdirname:
             cli_result = self.build_docs_setup(