From bc3e25f8c1edbd233ed0c266c574892e88644d9c Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Wed, 15 Jan 2025 15:54:27 +1300
Subject: Implement image galleries

Each gallery image must be kept in the three directories images/large,
images/small, and images/thumb. A gallery is a fragment with the
language 'gallery' containing a list of image filenames, one per line.
---
 src/collect_files.rs | 14 ++++++++++++++
 src/generate_html.rs | 11 +++++++++++
 2 files changed, 25 insertions(+)

(limited to 'src')

diff --git a/src/collect_files.rs b/src/collect_files.rs
index b0e24ed..cf39ebe 100644
--- a/src/collect_files.rs
+++ b/src/collect_files.rs
@@ -121,6 +121,15 @@ impl Website {
         // Process each entry.
         if entry.is_directory() {
             if let Some(stripped) = entry.name.strip_prefix("!") {
+                // Track all files inside the static directory.
+                for child in traverse_directory(&entry).unwrap() {
+                    let source_path = child.original_path;
+                    let relative_path = source_path.strip_prefix(&entry.original_path).unwrap_or_else(
+                        |_| error!("Path doesn't start with {prefix:?}: {source_path:?}"))
+                        .as_os_str().to_string_lossy().to_string();
+                    let full_url = format!("{stripped}/{relative_path}");
+                    self.static_files.push(StaticItem { full_url, source_path })
+                }
                 let full_url = make_url_safe(stripped);
                 self.static_dirs.push(StaticItem { full_url, source_path });
             } else {
@@ -299,6 +308,11 @@ impl Website {
         return None;
     }
 
+    pub fn has_image(&self, file_name: &str) -> bool {
+        let image_path = format!("images/thumb/{file_name}");
+        self.static_files.iter().any(|s| s.full_url == image_path)
+    }
+
     pub fn get_config(&self, key: &str) -> String {
         self.config.get(key).map(String::to_owned).unwrap_or_else(String::new)
     }
diff --git a/src/generate_html.rs b/src/generate_html.rs
index 3486352..0210986 100644
--- a/src/generate_html.rs
+++ b/src/generate_html.rs
@@ -188,6 +188,17 @@ pub fn document_to_html(document: &MarkdownDocument, page: &Page, website: &Webs
                         for paragraph in recipe.process { html!("<p>{paragraph}</p>") }
                         html!("</div>");
                     },
+                    "gallery" => wrap!("div", "class='gallery'", for line in content.lines() {
+                        let file = line.trim();
+                        if !website.has_image(file) {
+                            warn!("Gallery on page {:?} references nonexistent image {file:?}", page.name);
+                            continue;
+                        }
+                        let large = format!("{root}images/large/{file}");
+                        // let small = format!("{root}images/small/{file}");
+                        let thumb = format!("{root}images/thumb/{file}");
+                        html!("<a href='{large}'><img src='{thumb}'></a>");
+                    }),
                     _ => {
                         html!("<pre class='{}'>", language);
                         html!("{}", sanitize_text(content));
-- 
cgit v1.2.3-70-g09d2