Add tag search.

src/lib.rs

@@ -23,6 +23,7 @@ use std::ffi::OsStr;
 
 use git2::{Repository, Signature, Commit};
 
+use rocket::form::validate::Contains;
 use tera::Tera;
 use toml::value::Table;
 use serde::Serialize;
@@ -756,6 +757,36 @@ impl<'a> Searcher<'a> {
         results
     }
 
+    pub fn tag_search(&self, root: &Page, tag: &str) -> Vec<SearchResult> {
+        let mut results: Vec<SearchResult> = vec![];
+        for child in &root.children {
+            if let Some(child_page) = self.historian.resolve_to_page(&child.full_name) {
+                for result in self.tag_search(&child_page, tag) {
+                    results.push(result);
+                }
+
+                let mut content = String::new();
+                if let Ok(mut file) = fs::File::open(&child_page.path) {
+                    file.read_to_string(&mut content).unwrap();
+                }
+
+                let mut metadata = Table::new();
+                parse_markdown(&content, &mut metadata);
+
+                if metadata.contains_key("tags") {
+                    let tags = metadata.get("tags").unwrap();
+                    if tags.is_array() && tags.as_array().contains(toml::Value::String(tag.to_owned())) {
+                        results.push(SearchResult {
+                            page: child_page,
+                            matches: vec![]
+                        });
+                    }
+                }
+            }
+        }
+        results
+    }
+
     fn do_search(&self, root: &Page, results: &mut Vec<SearchResult>, searcher: &mut grep::searcher::Searcher, matcher: &grep::regex::RegexMatcher) {
         for child in &root.children {
             if let Some(child_page) = self.historian.resolve_to_page(&child.full_name) {