Add last modified date automation

3 files changed, 38 insertions, 20 deletions

diff --git a/docs/stories.html b/docs/stories.html
index 4d3894f..f724dd3 100644
--- a/docs/stories.html
+++ b/docs/stories.html
@@ -39,18 +39,6 @@ Despite my linguistic difficulties to express myself, my love for story telling
 </div>
 <div class="works">
     
-        <a href="./stories/the_fallen_dragons_of_bavaria.html" class="work-card card">
-            <div class="title-and-description">
-                <h3>The fallen dragons of Bavaria</h3>
-                <p>In his new life in Germany Kazuyuki is needed by dragons.</p>
-            </div>
-            <div class="info">
-                <span>3 Pages</span>
-                <span class="story-language">English</span>
-                <span>Last Update: 2023-04-02</span>
-            </div>
-        </a>
-    
         <a href="./stories/das_schweigende_spiegelbild.html" class="work-card card">
             <div class="title-and-description">
                 <h3>Das schweigende Spiegelbild</h3>
@@ -59,7 +47,7 @@ Despite my linguistic difficulties to express myself, my love for story telling
             <div class="info">
                 <span>2 Pages</span>
                 <span class="story-language">German</span>
-                <span>Last Update: 2023-01-28</span>
+                <span>Last Update: 2023-04-10</span>
             </div>
         </a>
     
@@ -71,7 +59,19 @@ Despite my linguistic difficulties to express myself, my love for story telling
             <div class="info">
                 <span>7 Pages</span>
                 <span class="story-language">German</span>
-                <span>Last Update: 2023-01-28</span>
+                <span>Last Update: 2023-04-10</span>
+            </div>
+        </a>
+    
+        <a href="./stories/the_fallen_dragons_of_bavaria.html" class="work-card card">
+            <div class="title-and-description">
+                <h3>The fallen dragons of Bavaria</h3>
+                <p>In his new life in Germany Kazuyuki is needed by dragons.</p>
+            </div>
+            <div class="info">
+                <span>3 Pages</span>
+                <span class="story-language">English</span>
+                <span>Last Update: 2023-04-02</span>
             </div>
         </a>
     
diff --git a/src/works/stories.rs b/src/works/stories.rs
index 9db3ec3..c2b4b8f 100644
--- a/src/works/stories.rs
+++ b/src/works/stories.rs
@@ -15,6 +15,7 @@ struct Story {
     path_to_document: String,
     number_of_pages: u16,
     language: Language,
+    #[serde(default)]
     last_update: NaiveDate,
 }
 
@@ -40,6 +41,16 @@ impl super::Works for Stories {
         }
         anyhow::Ok(()).with_context(|| "Failed to render single story pages")
     }
+
+    // create stories from stories.json and add last modification date
+    fn new_from_file(file: std::fs::File) -> anyhow::Result<Self> {
+        let mut stories: Stories = serde_json::from_reader(std::io::BufReader::new(&file))?;
+        for story in stories.0.iter_mut() {
+            story.get_last_modified()?;
+        }
+        // add error context
+        Ok(stories)
+    }
 }
 
 impl Story {
@@ -87,6 +98,16 @@ impl Story {
         let text = std::fs::read_to_string(self.get_content_html_path())?;
         anyhow::Ok(text).with_context(|| format!("Failed to extract text for {}", self.title))
     }
+
+    // get date of last modification of pdf file
+    fn get_last_modified(&mut self) -> anyhow::Result<chrono::NaiveDate> {
+        use std::os::linux::fs::MetadataExt;
+        let pdf_last_modification = std::fs::metadata(self.get_pdf_path())?.st_mtime();
+        let html_last_modification = std::fs::metadata(self.get_html_path())?.st_mtime();
+        let date = chrono::NaiveDateTime::from_timestamp(std::cmp::max(pdf_last_modification, html_last_modification), 0).date();
+        self.last_update = date;
+        Ok(date)
+    }
 }
 
 // language of story content
diff --git a/stories.json b/stories.json
index 2fec76b..e9b10a9 100644
--- a/stories.json
+++ b/stories.json
@@ -4,23 +4,20 @@
         "description": "Der gefährliche Zauber von Leon wird von seinem wegweisenden Freund durchschaut. Kann er ihn stoppen?",
         "path_to_document": "mit_gutem_gewissen.pdf",
         "number_of_pages": 7,
-        "language": "German",
-        "last_update": "2023-01-28"
+        "language": "German"
     },
     {
         "title": "Das schweigende Spiegelbild",
         "description": "Das Spiegelbild verzweifelt in seiner Hilflosigkeit gegenüber seinem Ich.",
         "path_to_document": "das_schweigende_spiegelbild.pdf",
         "number_of_pages": 2,
-        "language": "German",
-        "last_update": "2023-01-28"
+        "language": "German"
     },
     {
         "title": "The fallen dragons of Bavaria",
         "description": "In his new life in Germany Kazuyuki is needed by dragons.",
         "path_to_document": "the_fallen_dragons_of_bavaria.pdf",
         "number_of_pages": 3,
-        "language": "English",
-        "last_update": "2023-04-02"
+        "language": "English"
     }
 ]