From e93a903cb50deaf4ae7f9055be4730e1f27e698a Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Wed, 9 Nov 2022 13:09:17 +0200
Subject: refactor: processing a directive returns Processed type, not String

This paves way for non-Markdown placeholders that can be
post-processed.

Sponsored-by: author
---
 src/directive/mod.rs | 11 ++++++++---
 src/wikitext.rs      |  9 ++++++---
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/directive/mod.rs b/src/directive/mod.rs
index e33f572..5bc8ef6 100644
--- a/src/directive/mod.rs
+++ b/src/directive/mod.rs
@@ -6,6 +6,10 @@ use crate::wikitext::ParsedDirective;
 use log::{debug, trace};
 use std::collections::HashSet;
 
+pub enum Processed {
+    Markdown(String),
+}
+
 #[derive(Debug, Eq, PartialEq)]
 pub enum Directive {
     Simple,
@@ -204,8 +208,8 @@ impl Directive {
         Ok(())
     }
 
-    pub fn process(&self, site: &mut Site, meta: &mut PageMeta) -> Result<String, SiteError> {
-        match self {
+    pub fn process(&self, site: &mut Site, meta: &mut PageMeta) -> Result<Processed, SiteError> {
+        let markdown = match self {
             Self::Simple
             | Self::UnnamedArg
             | Self::SimpleArg
@@ -227,7 +231,8 @@ impl Directive {
             Self::Tag(x) => x.process(site, meta),
             Self::Toc(x) => x.process(site, meta),
             Self::TrailLink(x) => x.process(site, meta),
-        }
+        };
+        Ok(Processed::Markdown(markdown?))
     }
 }
 
diff --git a/src/wikitext.rs b/src/wikitext.rs
index 81514f0..25da818 100644
--- a/src/wikitext.rs
+++ b/src/wikitext.rs
@@ -1,4 +1,4 @@
-use crate::directive::Directive;
+use crate::directive::{Directive, Processed};
 use crate::error::SiteError;
 use crate::page::PageMeta;
 use crate::site::Site;
@@ -43,8 +43,11 @@ impl Snippet {
             Snippet::Directive(p) => {
                 let e = Directive::try_from(p);
                 if let Ok(d) = e {
-                    d.process(site, meta)
-                        .map_err(|e| SiteError::PageProblem(meta.path().into(), Box::new(e)))?
+                    let processed = d.process(site, meta)
+                        .map_err(|e| SiteError::PageProblem(meta.path().into(), Box::new(e)))?;
+                    match processed {
+                        Processed::Markdown(s) => s,
+                    }
                 } else if let Some(shortcut) = site.shortcut(p.name()) {
                     let arg = p.unnamed_args().first().unwrap().to_string();
                     format!("[{}]({})", shortcut.desc(&arg), shortcut.url(&arg))
-- 
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