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const std = @import("std");
const Allocator = std.mem.Allocator;
const Token = @import("lexer/Token.zig");
const Lexer = @import("lexer/Lexer.zig");
const Element = @import("eval/Element.zig");
const paragraph = @import("paragraph.zig");
const title = @import("title.zig");
const link = @import("link.zig");
pub const Error = error{
FeatureNotSupported,
} || Lexer.Error || paragraph.Error || title.Error || link.Error || Allocator.Error;
pub fn parseReader(parent: Allocator, r: *std.io.Reader) ![]const u8 {
var l = try Lexer.initReader(parent, r);
defer parent.free(l.iter.bytes);
return gen(parent, &l);
}
pub fn parse(parent: Allocator, content: []const u8) Error![]const u8 {
var l = try Lexer.init(content);
return gen(parent, &l);
}
fn gen(parent: Allocator, l: *Lexer) Error![]const u8 {
var arena = std.heap.ArenaAllocator.init(parent);
defer arena.deinit();
const alloc = arena.allocator();
var elements = try std.ArrayList(Element).initCapacity(alloc, 2);
base: while (l.peek()) |it| {
try elements.append(alloc, switch (it.kind) {
// block paragraph
.literal, .bold, .italic, .code, .link => try paragraph.parse(alloc, l),
// other blocks
.title => try title.parse(alloc, l),
.weak_delimiter, .strong_delimiter => {
l.consume();
continue :base;
},
else => return Error.FeatureNotSupported,
});
}
var res = try std.ArrayList(u8).initCapacity(parent, elements.items.len);
errdefer res.deinit(parent);
for (elements.items) |it| {
try res.appendSlice(parent, try it.renderHTML(alloc));
}
return res.toOwnedSlice(parent);
}
fn doTest(alloc: Allocator, t: []const u8, v: []const u8) !void {
const g = try parse(alloc, t);
defer alloc.free(g);
std.testing.expect(std.mem.eql(u8, g, v)) catch |err| {
std.debug.print("{s}\n", .{g});
return err;
};
}
test "parse multilines" {
const alloc = std.testing.allocator;
try doTest(alloc,
\\hello
\\world
\\
\\foo bar
\\in new paragraph
, "<p>hello world</p><p>foo bar in new paragraph</p>");
try doTest(alloc,
\\# title
\\hello world ;3
\\## subtitle
\\hehe
, "<h1>title</h1><p>hello world ;3</p><h2>subtitle</h2><p>hehe</p>");
}
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