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const std = @import("std");
const Allocator = std.mem.Allocator;
const eql = std.mem.eql;
const Token = @import("lexer/Token.zig");
const Lexer = @import("lexer/Lexer.zig");
const Element = @import("eval/Element.zig");
const testing = @import("testing.zig");
const paragraph = @import("paragraph.zig");
const doTest = testing.do;
const doTestError = testing.doError;
pub const Error = error{InvalidCallout} || paragraph.Error || Allocator.Error;
pub fn parse(alloc: Allocator, l: *Lexer) Error!Element {
_ = l.next();
var beg = l.next() orelse return Error.InvalidCallout;
var kind: ?[]const u8 = null;
var title: ?[]const u8 = null;
switch (beg.kind) {
.literal => {
var iter = std.mem.splitAny(u8, beg.content, " ");
kind = iter.first();
if (iter.peek() != null) title = iter.buffer[iter.index.?..];
beg = l.next() orelse return Error.InvalidCallout;
if (!beg.kind.isDelimiter()) return Error.InvalidCallout;
},
else => if (!beg.kind.isDelimiter()) return Error.InvalidCallout,
}
var root = try Element.Root.init(alloc);
while (l.peek()) |it| {
if (it.kind == .callout) {
l.consume();
break;
}
if (it.kind.isDelimiter()) {
const next = l.peek() orelse return Error.InvalidCallout;
if (next.kind == .callout) {
l.consume();
break;
}
}
root.append(try paragraph.parse(root.allocator(), l));
_ = l.peek() orelse return Error.InvalidCallout;
}
var el = try Element.Callout.init(alloc, root.element());
el.kind = kind;
el.title = title;
const end = l.next() orelse return el.element();
if (!end.kind.isDelimiter()) return Error.InvalidCallout;
return el.element();
}
test "callout" {
const alloc = std.testing.allocator;
try doTest(parse, alloc,
\\:::
\\hey
\\:::
, "<div data-callout=\"default\" class=\"callout\"><h4>default</h4><p>hey</p></div>");
try doTest(parse, alloc,
\\:::info
\\hey
\\:::
, "<div data-callout=\"info\" class=\"callout\"><h4>info</h4><p>hey</p></div>");
try doTest(parse, alloc,
\\::: info Title
\\hey
\\:::
, "<div data-callout=\"info\" class=\"callout\"><h4>Title</h4><p>hey</p></div>");
// cannot test content with \n
try doTestError(parse, alloc, ":::", Error.InvalidCallout);
try doTestError(parse, alloc,
\\:::
\\hey
, Error.InvalidCallout);
try doTestError(parse, alloc,
\\:::
\\hey:::
, Error.IllegalPlacement);
try doTestError(parse, alloc,
\\:::
\\hey
\\::: nope
, Error.InvalidCallout);
}
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