From 047cfc35db5bdd438de6cea7f67be8b1a171f4a7 Mon Sep 17 00:00:00 2001
From: alex <alex@pdp7.net>
Date: Sun, 17 Sep 2023 18:12:49 +0200
Subject: [PATCH] Render HTML for entries

---
 blog_experiment/blog/blog_pages.py | 62 +++++++++++++++++++++++++++++-
 1 file changed, 60 insertions(+), 2 deletions(-)

diff --git a/blog_experiment/blog/blog_pages.py b/blog_experiment/blog/blog_pages.py
index 7808c16..f4124d0 100644
--- a/blog_experiment/blog/blog_pages.py
+++ b/blog_experiment/blog/blog_pages.py
@@ -7,7 +7,7 @@ import bicephalus
 
 import htmlgenerator as h
 
-from blog import html, page
+from blog import html, page, gemtext
 
 
 class Entry:
@@ -28,6 +28,64 @@ class Entry:
     def uri(self):
         return f"/{self.path.parts[1]}/{self.path.parts[2]}/{self.path.stem}/"
 
+    def html(self):
+        parsed = gemtext.parse(self.content)
+
+        assert isinstance(parsed[0], gemtext.Header)
+        assert parsed[0].level == 1
+        assert isinstance(parsed[1], gemtext.Line)
+        assert parsed[2] == gemtext.Line("")
+
+        parsed = parsed[3:]
+        i = 0
+
+        result = []
+        while i < len(parsed):
+            gem_element = parsed[i]
+
+            if isinstance(gem_element, gemtext.Header):
+                header = [h.H1, h.H2, h.H3, h.H4, h.H5, h.H6][gem_element.level - 1]
+                result.append(header(gem_element.text))
+                i = i + 1
+                continue
+
+            if isinstance(gem_element, gemtext.List):
+                result.append(h.UL([h.LI(i.text) for i in gem_element.items]))
+                i = i + 1
+                continue
+
+            if isinstance(gem_element, gemtext.Link):
+                result.append(h.P(h.A(gem_element.text or gem_element.url, href=gem_element.url)))
+                i = i + 1
+                continue
+
+            if gem_element == gemtext.Line(""):
+                i = i + 1
+                continue
+
+            if isinstance(gem_element, gemtext.BlockQuote):
+                assert len(gem_element.lines) == 1
+                result.append(h.BLOCKQUOTE(gem_element.lines[0].text))
+                i = i + 1
+                continue
+
+            if isinstance(gem_element, gemtext.Line):
+                paragraph = [gem_element.text]
+                i = i + 1
+                while i < len(parsed):
+                    gem_element = parsed[i]
+                    if isinstance(gem_element, gemtext.Line) and gem_element.text != "":
+                        paragraph.append(h.BR())
+                        paragraph.append(gem_element.text)
+                        i = i + 1
+                    else:
+                        break
+                result.append(h.P(*paragraph))
+                continue
+            assert False, f"unknown element {gem_element}"
+
+        return result
+
 
 class Root(page.BasePage):
     def entries(self):
@@ -75,6 +133,6 @@ class EntryPage(page.BasePage):
             bicephalus.Status.OK,
             "text/html",
             html.html_template(
-                h.PRE(self.entry.content),
+                *self.entry.html(),
             ),
         )
-- 
2.47.3