From c70ffd095a6de5cd5b872796a0d82a8c5afc1511 Mon Sep 17 00:00:00 2001
From: Uko Kokņevičs
Date: Sat, 20 Jul 2024 17:22:25 +0300
Subject: Initial commit

---
 src/types/MessageEntity.zig | 66 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/types/MessageEntity.zig

(limited to 'src/types/MessageEntity.zig')

diff --git a/src/types/MessageEntity.zig b/src/types/MessageEntity.zig
new file mode 100644
index 0000000..1c44d20
--- /dev/null
+++ b/src/types/MessageEntity.zig
@@ -0,0 +1,66 @@
+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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