feat: add handleTableUpdate and handleTableDelete to server

src/server.zig

@@ -1699,3 +1699,155 @@ pub const Server = struct {
         };
         defer plan.deinit(self.allocator);
 
+        const out = protocol.encodePlan(self.allocator, plan) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+        defer self.allocator.free(out);
+        try protocol.writeFrame(writer, @intFromEnum(protocol.Status.ok), out);
+    }
+
+    /// Executes a `table_update` request: the network counterpart of the
+    /// CLI's local `table update <table> --set ... [expr...]`, running
+    /// `query.Table.updateWhere` against the server's `*Db`. The wire
+    /// `sets` field list arrives pre-encoded with `Row.encode` (the same
+    /// trick `decodeTxnOp`'s `fieldsBytes` uses), so it is decoded into a
+    /// real `Row` here before `updateWhere` ever sees it. The response is a
+    /// bare row count reusing `encodeTtlSweepCount`'s u64 wire shape - the
+    /// same "no new response type, an existing shape already fits"
+    /// precedent `coll_ttl_op` set for `ttl_op`'s result encoding.
+    fn handleTableUpdate(self: *Server, payload: []const u8, writer: anytype) !void {
+        const args = protocol.decodeTableUpdate(payload) catch {
+            return writeErr(writer, .bad_request, "malformed table_update payload");
+        };
+
+        var setsRow = rowmod.Row.decode(self.allocator, args.setsBytes) catch {
+            return writeErr(writer, .bad_request, "malformed table_update set fields");
+        };
+        defer setsRow.deinit();
+
+        var table = querymod.Table.open(self.db, self.allocator, args.table) catch |err| {
+            return writeErr(writer, .bad_request, @errorName(err));
+        };
+        defer table.deinit();
+
+        var parsed: ?exprmod.Parsed = null;
+        defer if (parsed) |*p| p.deinit();
+        if (args.exprText.len > 0) {
+            parsed = exprmod.parse(self.allocator, args.exprText) catch |err| {
+                return writeErr(writer, .bad_request, @errorName(err));
+            };
+        }
+        const pred: ?querymod.Predicate = if (parsed) |p| p.predicate else null;
+
+        const updated = table.updateWhere(pred, setsRow.fields.items) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+
+        const out = protocol.encodeTtlSweepCount(self.allocator, @intCast(updated)) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+        defer self.allocator.free(out);
+        try protocol.writeFrame(writer, @intFromEnum(protocol.Status.ok), out);
+    }
+
+    /// Executes a `table_delete` request: the network counterpart of the
+    /// CLI's local `table delete <table> [expr...]`, running
+    /// `query.Table.deleteWhere` against the server's `*Db`. Same wire shape
+    /// as `table_explain` (table + exprText, no `SET` clause) and same
+    /// response shape as `table_update` (a bare row count reusing
+    /// `encodeTtlSweepCount`'s u64 wire shape).
+    fn handleTableDelete(self: *Server, payload: []const u8, writer: anytype) !void {
+        const args = protocol.decodeTableDelete(payload) catch {
+            return writeErr(writer, .bad_request, "malformed table_delete payload");
+        };
+
+        var table = querymod.Table.open(self.db, self.allocator, args.table) catch |err| {
+            return writeErr(writer, .bad_request, @errorName(err));
+        };
+        defer table.deinit();
+
+        var parsed: ?exprmod.Parsed = null;
+        defer if (parsed) |*p| p.deinit();
+        if (args.exprText.len > 0) {
+            parsed = exprmod.parse(self.allocator, args.exprText) catch |err| {
+                return writeErr(writer, .bad_request, @errorName(err));
+            };
+        }
+        const pred: ?querymod.Predicate = if (parsed) |p| p.predicate else null;
+
+        const deleted = table.deleteWhere(pred) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+
+        const out = protocol.encodeTtlSweepCount(self.allocator, @intCast(deleted)) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+        defer self.allocator.free(out);
+        try protocol.writeFrame(writer, @intFromEnum(protocol.Status.ok), out);
+    }
+
+    /// Executes a `table_export` request: the network counterpart of the
+    /// CLI's local `table export <table> csv|json <path>`, rendering the
+    /// whole table through `dump.zig`'s `exportCsvWriter`/`exportJsonWriter`
+    /// (the same functions the local path calls, just pointed at an
+    /// in-memory `ArrayList` writer instead of a file, since there is no
+    /// filesystem path to write to on the server side of a request) and
+    /// sending the row count plus the rendered bytes back in one frame.
+    fn handleTableExport(self: *Server, payload: []const u8, writer: anytype) !void {
+        const args = protocol.decodeTableExport(payload) catch {
+            return writeErr(writer, .bad_request, "malformed table_export payload");
+        };
+
+        var table = querymod.Table.open(self.db, self.allocator, args.table) catch |err| {
+            return writeErr(writer, .bad_request, @errorName(err));
+        };
+        defer table.deinit();
+
+        var buf = std.ArrayList(u8).init(self.allocator);
+        defer buf.deinit();
+        const rowCount = switch (args.format) {
+            .csv => dumpmod.exportCsvWriter(self.allocator, &table, buf.writer()),
+            .json => dumpmod.exportJsonWriter(self.allocator, &table, buf.writer()),
+        } catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+
+        const out = protocol.encodeExportResult(self.allocator, @intCast(rowCount), buf.items) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+        defer self.allocator.free(out);
+        try protocol.writeFrame(writer, @intFromEnum(protocol.Status.ok), out);
+    }
+
+    /// Executes a `table_import` request: the network counterpart of the
+    /// CLI's local `table import <table> csv|json <path>`, feeding the
+    /// wire-carried `content` bytes straight into `dump.zig`'s
+    /// `importCsvContent`/`importJsonContent` (the same functions the local
+    /// path calls after reading a file into memory - the client already did
+    /// that reading, so the server only ever sees bytes, never a path)
+    /// against the server's `*Db`. The response is a bare row count, the
+    /// same u64 wire shape `table_update`/`table_delete` already use.
+    fn handleTableImport(self: *Server, payload: []const u8, writer: anytype) !void {
+        const args = protocol.decodeTableImport(payload) catch {
+            return writeErr(writer, .bad_request, "malformed table_import payload");
+        };
+
+        var table = querymod.Table.open(self.db, self.allocator, args.table) catch |err| {
+            return writeErr(writer, .bad_request, @errorName(err));
+        };
+        defer table.deinit();
+
+        const imported = switch (args.format) {
+            .csv => dumpmod.importCsvContent(self.allocator, &table, args.content),
+            .json => dumpmod.importJsonContent(self.allocator, &table, args.content),
+        } catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+
+        const out = protocol.encodeTtlSweepCount(self.allocator, @intCast(imported)) catch |err| {
+            return writeErr(writer, .internal, @errorName(err));
+        };
+        defer self.allocator.free(out);
+        try protocol.writeFrame(writer, @intFromEnum(protocol.Status.ok), out);
+    }
+