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const std = @import("std");
const MessageEntity = @This();
const User = @import("User.zig");
const Utf8View = std.unicode.Utf8View;
pub const Type = enum {
mention,
hashtag,
cashtag,
bot_command,
url,
email,
phone_number,
bold,
italic,
underline,
strikethrough,
spoiler,
blockquote,
expandable_blockquote,
code,
pre,
text_link,
text_mention,
custom_emoji,
};
type: Type,
offset: u64,
length: u64,
url: ?[]const u8 = null,
user: ?User = null,
language: ?[]const u8 = null,
custom_emoji_id: ?[]const u8 = null,
pub fn extract(self: MessageEntity, src: []const u8) ![]const u8 {
if (self.length == 0) {
return "";
}
var utf8 = (try Utf8View.init(src)).iterator();
var i: usize = 0;
const start = if (i >= self.offset)
utf8.i
else blk: {
while (utf8.nextCodepoint()) |cp| {
i += std.unicode.utf16CodepointSequenceLength(cp) catch unreachable;
if (i >= self.offset) {
break :blk utf8.i;
}
}
return "";
};
i = 0;
while (utf8.nextCodepoint()) |cp| {
i += std.unicode.utf16CodepointSequenceLength(cp) catch unreachable;
if (i >= self.length) {
return src[start..utf8.i];
}
}
return src[start..];
}
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