From f23fe81456b2f5174aadbec63c333d77af21dc36 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Fri, 28 Oct 2022 16:42:11 +0300
Subject: feat: implement a simple version of the inline directive

This version just produces a list of links to the matching pages. The
link text is the page title, is any.

Sponsored-by: author
---
 src/directive/inline.rs | 33 ++++++++++++++++++++++++++-------
 1 file changed, 26 insertions(+), 7 deletions(-)

diff --git a/src/directive/inline.rs b/src/directive/inline.rs
index 7bef13c..78872b4 100644
--- a/src/directive/inline.rs
+++ b/src/directive/inline.rs
@@ -1,10 +1,15 @@
 use crate::error::SiteError;
 use crate::page::PageMeta;
+use crate::pagespec::PageSpec;
 use crate::site::Site;
 use crate::wikitext::ParsedDirective;
+use crate::util::make_relative_link;
+use std::path::Path;
 
 #[derive(Debug, Default, Eq, PartialEq)]
-pub struct Inline {}
+pub struct Inline {
+    pages: String,
+}
 
 impl Inline {
     pub const REQUIRED: &'static [&'static str] = &["pages"];
@@ -26,17 +31,31 @@ impl Inline {
     ];
     pub const ALLOW_ANY_UNNAMED: bool = true;
 
-    pub fn new() -> Self {
-        Self::default()
+    pub fn new(pages: String) -> Self {
+        Self { pages }
+    }
+
+    pub fn process(&self, site: &Site, meta: &mut PageMeta) -> Result<String, SiteError> {
+        let pagespec = PageSpec::new(meta.path(), &self.pages)?;
+        let matches: Vec<String> = site
+            .markdown_pages()
+            .iter()
+            .filter(|page| pagespec.matches(&site, page.meta().path()))
+            .map(|page| format!("* {}\n", Self::link(meta.path(), page.meta())))
+            .collect();
+        Ok(matches.join(""))
     }
 
-    pub fn process(&self, _site: &Site, _meta: &mut PageMeta) -> Result<String, SiteError> {
-        Err(SiteError::UnimplementedDirective("inline".into()))
+    fn link(container: &Path, meta: &PageMeta) -> String {
+        let link = make_relative_link(container, meta.path());
+        format!("[{}]({})", meta.title(), link.display())
     }
 }
 
 impl From<&ParsedDirective> for Inline {
-    fn from(_p: &ParsedDirective) -> Self {
-        Inline::new()
+    fn from(p: &ParsedDirective) -> Self {
+        let args = p.args();
+        let pages = args.get("pages").unwrap();
+        Inline::new(pages.to_string())
     }
 }
-- 
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