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2026-07-06 12:37:49 -05:00

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Go

// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
// --8<-- [start:example]
import (
"fmt"
"google.golang.org/adk/v2/agent"
)
type updateUserPreferenceArgs struct {
Preference string `json:"preference" jsonschema:"The name of the preference to set."`
Value string `json:"value" jsonschema:"The value to set for the preference."`
}
type updateUserPreferenceResult struct {
UpdatedPreference string `json:"updated_preference"`
}
func updateUserPreference(ctx agent.Context, args updateUserPreferenceArgs) (*updateUserPreferenceResult, error) {
userPrefsKey := "user:preferences"
val, err := ctx.State().Get(userPrefsKey)
if err != nil {
val = make(map[string]any)
}
preferencesMap, ok := val.(map[string]any)
if !ok {
preferencesMap = make(map[string]any)
}
preferencesMap[args.Preference] = args.Value
if err := ctx.State().Set(userPrefsKey, preferencesMap); err != nil {
return nil, err
}
fmt.Printf("Tool: Updated user preference '%s' to '%s'\n", args.Preference, args.Value)
return &updateUserPreferenceResult{
UpdatedPreference: args.Preference,
}, nil
}
// --8<-- [end:example]