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return message if no text available

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This commit is contained in:
Emil Lerch 2025-10-15 16:44:58 -07:00
parent a64e35ed75
commit 22aad3ed8f
Signed by: lobo
GPG key ID: A7B62D657EF764F8
2 changed files with 46 additions and 3 deletions
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14
src/Email.zig
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@ -322,14 +322,22 @@ pub const Message = struct {
, .{text_content.?});
}
var final_text = text_content orelse try allocator.dupe(u8, "no text or html versions available");
// If text is empty (e.g., HTML with only images without alt tags), provide fallback
if (final_text.len == 0) {
allocator.free(final_text);
final_text = try allocator.dupe(u8, "Message contains only image data without alt tags");
}
return .{
.text = text_content orelse "no text or html versions available",
.html = html_content orelse
.text = final_text,
.html = html_content orelse try allocator.dupe(u8,
\\<html>
\\<head><title>No text or HTML version available</title></head>
\\<body>No text or HTML versions available</body>
\\</html>
,
),
};
}

35
src/textTransformation.zig
View file

@ -22,6 +22,25 @@ pub fn htmlToText(allocator: std.mem.Allocator, html: []const u8) ![]const u8 {
} else if (i + 8 <= html.len and std.mem.eql(u8, html[i .. i + 8], "</style>")) {
in_style = false;
i += 7;
} else if (i + 4 <= html.len and std.mem.eql(u8, html[i .. i + 4], "<img")) {
// Extract alt attribute from img tags
const tag_end = std.mem.indexOfScalarPos(u8, html, i, '>') orelse html.len;
const tag_content = html[i..tag_end];
if (std.mem.indexOf(u8, tag_content, "alt=\"")) |alt_start| {
const alt_value_start = alt_start + 5;
if (std.mem.indexOfScalarPos(u8, tag_content, alt_value_start, '"')) |alt_end| {
const alt_text = tag_content[alt_value_start..alt_end];
if (alt_text.len > 0) {
try result.append(allocator, '[');
for (alt_text) |c| {
try result.append(allocator, c);
}
try result.append(allocator, ']');
}
}
}
i = tag_end;
in_tag = false;
} else if ((i + 3 <= html.len and std.mem.eql(u8, html[i .. i + 3], "<br")) or
(i + 3 <= html.len and std.mem.eql(u8, html[i .. i + 3], "<p>")) or
(i + 4 <= html.len and std.mem.eql(u8, html[i .. i + 4], "<div")))
@ -117,3 +136,19 @@ test "htmlToText - plain text" {
defer allocator.free(text);
try std.testing.expectEqualStrings("Just plain text", text);
}
test "htmlToText - extracts img alt attributes" {
const allocator = std.testing.allocator;
const html = "<img src=\"test.jpg\" alt=\"Test Image\"><img alt=\"Another\" src=\"x.png\">";
const text = try htmlToText(allocator, html);
defer allocator.free(text);
try std.testing.expectEqualStrings("[Test Image][Another]", text);
}
test "htmlToText - img without alt" {
const allocator = std.testing.allocator;
const html = "<img src=\"test.jpg\">";
const text = try htmlToText(allocator, html);
defer allocator.free(text);
try std.testing.expectEqualStrings("", text);
}