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const std = @import("std");
const Io = std.Io;
const Allocator = std.mem.Allocator;
const ArenaAllocator = std.heap.ArenaAllocator;
const SplitIterator = std.mem.SplitIterator;
const DelimiterType = std.mem.DelimiterType;
const parser = @import("../root.zig");
const Parser = parser.Parser;
pub const IncludeTagError = error{
NoPathAttribute,
PathOpenFailure,
};
pub const Include: parser.ParserTag = .{
.name = "include",
.parse_fn = &parse,
};
fn parse(
arena: *ArenaAllocator,
io: Io,
state: *Parser,
reader: *Io.Reader,
writer: *Io.Writer,
attrs: *SplitIterator(u8, DelimiterType.scalar),
) anyerror!void {
const raw_path_attr: []const u8 = while (attrs.next()) |attr| {
var it = std.mem.splitScalar(u8, attr, '=');
if (std.mem.eql(u8, it.first(), "path")) {
const raw_path = it.next() orelse return IncludeTagError.NoPathAttribute;
if (raw_path.len == 0) return IncludeTagError.NoPathAttribute;
if ((raw_path[0] == '"' and raw_path[raw_path.len - 1] == '"') or
(raw_path[0] == '\'' and raw_path[raw_path.len - 1] == '\''))
{
if (raw_path.len <= 2) return IncludeTagError.NoPathAttribute;
break raw_path[1 .. raw_path.len - 1];
} else {
break raw_path;
}
}
} else return IncludeTagError.NoPathAttribute;
const path = try arena.allocator().dupe(u8, raw_path_attr);
// parse through to gather <export> tags
try state.tag_stack.append(arena.allocator(), "include");
try parser.parseTemplate(arena, io, state, reader, writer);
_ = state.tag_stack.pop();
const included_reader = state.component_resolver(arena, io, path) catch {
std.log.err("Include Tag: failed to open file {s}", .{path});
return IncludeTagError.PathOpenFailure;
};
try parser.parseTemplate(arena, io, state, included_reader, writer);
}
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