From: Alexander Goussas <alexandergoussas.thoughtworks@latam.com>
Date: Mon, 13 Apr 2026 02:43:13 +0000 (-0500)
Subject: start parsing markdown bodies
X-Git-Tag: v0.0.1~12
X-Git-Url: http://git.frustrated-labs.net/?a=commitdiff_plain;h=a428c8dfca79d546eef3a2ba423f3bfb5100e4c1;p=frustrated-functor.dev.git

start parsing markdown bodies
---

diff --git a/bin/blog-processor/src/markdown_parser.zig b/bin/blog-processor/src/markdown_parser.zig
index e909dba..738d021 100644
--- a/bin/blog-processor/src/markdown_parser.zig
+++ b/bin/blog-processor/src/markdown_parser.zig
@@ -7,36 +7,88 @@ const MarkdownParserError = error{
     UnexpectedToken,
 };
 
+const MarkdownNode = union(enum) {
+    h1: []const u8,
+    h2: []const u8,
+    p: []const u8,
+};
+
 pub const MarkdownDoc = struct {
     date: []const u8,
     summary: []const u8,
-    content: []const u8,
+    content: std.ArrayList(MarkdownNode),
 
-    pub fn parse(doc: []const u8, alloc: std.mem.Allocator) MarkdownParserError!@This() {
-        _ = alloc;
+    pub fn deinit(self: *@This(), alloc: std.mem.Allocator) void {
+        self.content.deinit(alloc);
+    }
 
+    pub fn parse(doc: []const u8, alloc: std.mem.Allocator) !@This() {
         var start: usize = 0;
         var current: usize = 0;
 
         var date: []const u8 = undefined;
         var summary: []const u8 = undefined;
+        var nodes: std.ArrayList(MarkdownNode) = .empty;
 
         while (current < doc.len) {
             start = current;
             const c = doc[current];
             switch (c) {
                 '-' => try parse_frontmatter(&current, doc, &date, &summary),
-                else => current += 1,
+                else => try parse_body(alloc, doc, &current, &nodes),
             }
         }
 
         return .{
             .date = date,
             .summary = summary,
-            .content = undefined
+            .content = nodes,
         };
     }
 
+    fn parse_body(alloc: std.mem.Allocator, doc: []const u8, current: *usize, nodes: *std.ArrayList(MarkdownNode)) !void {
+        advanceWhileFn(doc, current, std.ascii.isWhitespace);
+
+        while (current.* < doc.len) {
+            switch (doc[current.*]) {
+                '#' => {
+                    if (current.* + 1 < doc.len and doc[current.* + 1] == '#') {
+                        try parse_header_2(doc, current, nodes);
+                    } else {
+                        try parse_header_1(alloc, doc, current, nodes);
+                    }
+                },
+                else => try parse_paragraph(doc, current, nodes),
+            }
+        }
+    }
+
+    fn parse_header_1(alloc: std.mem.Allocator, doc: []const u8, current: *usize, nodes: *std.ArrayList(MarkdownNode)) !void {
+        try expectToken(doc, '#', current);
+        advanceWhile(doc, current, ' ');
+
+        const start = current.*;
+
+        advanceWhileNot(doc, current, '\n');
+        try nodes.append(alloc, .{ .h1 = doc[start..current.*] });
+
+        if (current.* < doc.len and doc[current.*] == '\n') {
+            current.* += 1;
+        }
+    }
+
+    fn parse_header_2(doc: []const u8, current: *usize, nodes: *std.ArrayList(MarkdownNode)) !void {
+        _ = doc;
+        _ = current;
+        _ = nodes;
+    }
+
+    fn parse_paragraph(doc: []const u8, current: *usize, nodes: *std.ArrayList(MarkdownNode)) !void {
+        _ = doc;
+        _ = current;
+        _ = nodes;
+    }
+
     fn parse_frontmatter(
         current: *usize,
         doc: []const u8,
@@ -72,13 +124,12 @@ pub const MarkdownDoc = struct {
     }
 
     fn expectToken(doc: []const u8, c: u8, current: *usize) MarkdownParserError!void {
-        if (doc[current.*] != c) {
-            const errMsg = "Expected '" ++ [1]u8{c} ++ "', but got '" ++ [1]u8{doc[current.*]} ++ "'";
+        if (current.* < doc.len and doc[current.*] != c) {
             if (!@inComptime()) {
-                logger.err(errMsg, .{});
+                logger.err("Expected '{}' but got '{}'", .{c, doc[current.*]});
                 return error.UnexpectedToken;
             } else {
-                @compileError(errMsg);
+                @compileError("Expected '" ++ [1]u8{c} ++ "', but got '" ++ [1]u8{doc[current.*]} ++ "'");
             }
         }
         assert(doc[current.*] == c);
@@ -133,3 +184,22 @@ test "can parse summary in frontmatter" {
 
     try std.testing.expectEqualStrings("This is the shit!", result.summary);
 }
+
+test "can parse h1 in body without newline at end" {
+    const doc =
+        \\----
+        \\date: 12/04/2026
+        \\summary: This is the shit!
+        \\----
+        \\
+        \\# The Post's Title
+        ;
+
+    const alloc = std.testing.allocator;
+
+    var result = MarkdownDoc.parse(doc, alloc) catch unreachable;
+    defer result.deinit(alloc);
+
+    try std.testing.expectEqual(1, result.content.items.len);
+    try std.testing.expectEqualStrings("The Post's Title", result.content.items[0].h1);
+}