show all notes from a category

src/rnote/app.rs

@@ -66,6 +66,14 @@ pub fn make_app() -> App<'static, 'static> {
                         .short("a")
                         .long("all"),
                 )
+                .arg(
+                    Arg::with_name("category")
+                        .help("Show all notes from a category/date")
+                        .short("c")
+                        .short("d")
+                        .long("category")
+                        .long("date"),
+                )
                 .arg(Arg::with_name("header").help("Name of the note.")),
         )
 }

src/rnote/notes.rs

@@ -190,3 +190,37 @@ pub fn show_all() -> Result<()> {
     show::run_app(skin, md)?;
     Ok(())
 }
+
+pub fn show(header: &str) -> Result<()> {
+    let path = find_path(header)?;
+    match path {
+        Some(s) => {
+            let skin = show::make_skin();
+            let content = fs::read_to_string(s)?;
+            show::run_app(skin, &content)?;
+            Ok(())
+        }
+        None => Err(anyhow!("Abort.")),
+    }
+}
+
+pub fn show_category(category: &str) -> Result<()> {
+    let base = get_base_path()?;
+    let path = format!("{}{}", base, category);
+    let mut files: Vec<String> = Vec::new();
+    if std::path::Path::new(&path).exists() {
+        for (_, file) in WalkDir::new(path)
+            .into_iter()
+            .filter_map(|file| file.ok())
+            .enumerate()
+        {
+            if file.metadata()?.is_file() {
+                files.push(fs::read_to_string(file.path())?);
+            }
+        }
+        let skin = show::make_skin();
+        let md = &files.join("---\n");
+        show::run_app(skin, md)?;
+    }
+    Ok(())
+}

src/rnote/process.rs

@@ -70,11 +70,19 @@ pub fn search(matches: &ArgMatches) -> Result<()> {
 
 pub fn show(matches: &ArgMatches) -> Result<()> {
     match matches.value_of("header") {
-        Some(s) => unimplemented!("{}", s),
+        Some(s) => notes::show(s)?,
         None => match matches.is_present("all") {
             true => notes::show_all()?,
+            false => match matches.is_present("category") {
+                true => {
+                    let category: String = Input::with_theme(&ColorfulTheme::default())
+                        .with_prompt("Name of category:")
+                        .interact_text()?;
+                    notes::show_category(&category)?;
+                }
                 false => return Err(anyhow!("No option is given. Abort.")),
             },
+        },
     }
     Ok(())
 }