Release 260111

common/markdown.py

@@ -0,0 +1,45 @@
+HTML_REPLACEMENTS = [
+  (r'&', r'&'),
+  (r'"', r'"'),
+]
+
+def parse_markdown(text: str, tab_length: int = 2) -> str:
+  lines = text.split("\n")
+  output: list[str] = []
+  list_level = 0
+
+  def end_outstanding_lists(level: int, end_level: int) -> int:
+    while level > end_level:
+      level -= 1
+      output.append("</ul>")
+      if level > 0:
+        output.append("</li>")
+    return end_level
+
+  for i, line in enumerate(lines):
+    if i + 1 < len(lines) and lines[i + 1].startswith("==="):  # heading
+      output.append(f"<h1>{line}</h1>")
+    elif line.startswith("==="):
+      pass
+    elif line.lstrip().startswith("* "):  # list
+      line_level = 1 + line.count(" " * tab_length, 0, line.index("*"))
+      if list_level >= line_level:
+        list_level = end_outstanding_lists(list_level, line_level)
+      else:
+        list_level += 1
+        if list_level > 1:
+          output[-1] = output[-1].replace("</li>", "")
+        output.append("<ul>")
+      output.append(f"<li>{line.replace('*', '', 1).lstrip()}</li>")
+    else:
+      list_level = end_outstanding_lists(list_level, 0)
+      if len(line) > 0:
+        output.append(line)
+
+  end_outstanding_lists(list_level, 0)
+  output_str = "\n".join(output) + "\n"
+
+  for (fr, to) in HTML_REPLACEMENTS:
+    output_str = output_str.replace(fr, to)
+
+  return output_str