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refactor: use zat.json.extractAt for TAP record parsing
now that extractAt ignores unknown fields, we can use it instead of
manual field-by-field extraction. 25 lines -> 4 lines.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
+3
-28
+3
-28
backend/src/tap.zig
+3
-28
backend/src/tap.zig
···
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if (!mem.eql(u8, msg_type, "record")) return;
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// extract record envelope manually (zat.extractAt was failing)
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const record_obj = zat.json.getObject(parsed.value, "record") orelse {
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std.debug.print("tap: no 'record' object in message\n", .{});
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return;
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};
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const record_val: json.Value = .{ .object = record_obj };
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const collection = zat.json.getString(record_val, "collection") orelse {
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std.debug.print("tap: record missing collection\n", .{});
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return;
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};
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const action = zat.json.getString(record_val, "action") orelse {
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std.debug.print("tap: record missing action\n", .{});
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// extract record envelope (extractAt ignores extra fields like live, rev, cid)
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const rec = zat.json.extractAt(TapRecord, allocator, parsed.value, .{"record"}) catch |err| {
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std.debug.print("tap: failed to extract record: {}\n", .{err});
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return;
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};
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const did_str = zat.json.getString(record_val, "did") orelse {
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std.debug.print("tap: record missing did\n", .{});
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return;
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};
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const rkey = zat.json.getString(record_val, "rkey") orelse {
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std.debug.print("tap: record missing rkey\n", .{});
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return;
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};
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const rec = TapRecord{
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.collection = collection,
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.action = action,
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.did = did_str,
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.rkey = rkey,
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};
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// validate DID