MCP Toolbox for Databases

// 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 lookerrundashboard import ( "context" "encoding/json" "fmt" "sync" yaml "github.com/goccy/go-yaml" "github.com/googleapis/genai-toolbox/internal/sources" "github.com/googleapis/genai-toolbox/internal/tools" "github.com/googleapis/genai-toolbox/internal/tools/looker/lookercommon" "github.com/googleapis/genai-toolbox/internal/util" "github.com/googleapis/genai-toolbox/internal/util/parameters" "github.com/looker-open-source/sdk-codegen/go/rtl" v4 "github.com/looker-open-source/sdk-codegen/go/sdk/v4" ) const kind string = "looker-run-dashboard" func init() { if !tools.Register(kind, newConfig) { panic(fmt.Sprintf("tool kind %q already registered", kind)) } } func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) { actual := Config{Name: name} if err := decoder.DecodeContext(ctx, &actual); err != nil { return nil, err } return actual, nil } type compatibleSource interface { UseClientAuthorization() bool GetAuthTokenHeaderName() string LookerClient() *v4.LookerSDK LookerApiSettings() *rtl.ApiSettings } type Config struct { Name string `yaml:"name" validate:"required"` Kind string `yaml:"kind" validate:"required"` Source string `yaml:"source" validate:"required"` Description string `yaml:"description" validate:"required"` AuthRequired []string `yaml:"authRequired"` Annotations *tools.ToolAnnotations `yaml:"annotations,omitempty"` } // validate interface var _ tools.ToolConfig = Config{} func (cfg Config) ToolConfigKind() string { return kind } func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) { dashboardidParameter := parameters.NewStringParameter("dashboard_id", "The id of the dashboard to run.") params := parameters.Parameters{ dashboardidParameter, } annotations := cfg.Annotations if annotations == nil { readOnlyHint := true annotations = &tools.ToolAnnotations{ ReadOnlyHint: &readOnlyHint, } } mcpManifest := tools.GetMcpManifest(cfg.Name, cfg.Description, cfg.AuthRequired, params, annotations) // finish tool setup return Tool{ Config: cfg, Parameters: params, manifest: tools.Manifest{ Description: cfg.Description, Parameters: params.Manifest(), AuthRequired: cfg.AuthRequired, }, mcpManifest: mcpManifest, }, nil } // validate interface var _ tools.Tool = Tool{} type Tool struct { Config Parameters parameters.Parameters `yaml:"parameters"` manifest tools.Manifest mcpManifest tools.McpManifest } func (t Tool) ToConfig() tools.ToolConfig { return t.Config } func (t Tool) Invoke(ctx context.Context, resourceMgr tools.SourceProvider, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return nil, err } logger, err := util.LoggerFromContext(ctx) if err != nil { return nil, fmt.Errorf("unable to get logger from ctx: %s", err) } logger.DebugContext(ctx, "params = ", params) paramsMap := params.AsMap() dashboard_id := paramsMap["dashboard_id"].(string) sdk, err := lookercommon.GetLookerSDK(source.UseClientAuthorization(), source.LookerApiSettings(), source.LookerClient(), accessToken) if err != nil { return nil, fmt.Errorf("error getting sdk: %w", err) } dashboard, err := sdk.Dashboard(dashboard_id, "", source.LookerApiSettings()) if err != nil { return nil, fmt.Errorf("error getting dashboard: %w", err) } data := make(map[string]any) data["tiles"] = make([]any, 0) if dashboard.Title != nil { data["title"] = *dashboard.Title } if dashboard.Description != nil { data["description"] = *dashboard.Description } channels := make([]<-chan map[string]any, len(*dashboard.DashboardElements)) for i, element := range *dashboard.DashboardElements { channels[i] = tileQueryWorker(ctx, sdk, source.LookerApiSettings(), i, element) } for resp := range merge(channels...) { data["tiles"] = append(data["tiles"].([]any), resp) } logger.DebugContext(ctx, "data = ", data) return data, nil } func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (parameters.ParamValues, error) { return parameters.ParseParams(t.Parameters, data, claims) } func (t Tool) Manifest() tools.Manifest { return t.manifest } func (t Tool) McpManifest() tools.McpManifest { return t.mcpManifest } func (t Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) (bool, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return false, err } return source.UseClientAuthorization(), nil } func (t Tool) Authorized(verifiedAuthServices []string) bool { return tools.IsAuthorized(t.AuthRequired, verifiedAuthServices) } func tileQueryWorker(ctx context.Context, sdk *v4.LookerSDK, options *rtl.ApiSettings, index int, element v4.DashboardElement) <-chan map[string]any { out := make(chan map[string]any) go func() { defer close(out) data := make(map[string]any) data["index"] = index if element.Title != nil { data["title"] = *element.Title } if element.TitleText != nil { data["title_text"] = *element.TitleText } if element.SubtitleText != nil { data["subtitle_text"] = *element.SubtitleText } if element.BodyText != nil { data["body_text"] = *element.BodyText } var q v4.Query if element.Query != nil { data["element_type"] = "query" q = *element.Query } else if element.Look != nil { data["element_type"] = "look" q = *element.Look.Query } else { // Just a text element data["element_type"] = "text" out <- data return } wq := v4.WriteQuery{ Model: q.Model, View: q.View, Fields: q.Fields, Pivots: q.Pivots, Filters: q.Filters, Sorts: q.Sorts, QueryTimezone: q.QueryTimezone, Limit: q.Limit, } query_result, err := lookercommon.RunInlineQuery(ctx, sdk, &wq, "json", options) if err != nil { data["query_status"] = "error running query" out <- data return } var resp []any e := json.Unmarshal([]byte(query_result), &resp) if e != nil { data["query_status"] = "error parsing query result" out <- data return } data["query_status"] = "success" data["query_result"] = resp out <- data }() return out } func merge(channels ...<-chan map[string]any) <-chan map[string]any { var wg sync.WaitGroup out := make(chan map[string]any) output := func(c <-chan map[string]any) { for n := range c { out <- n } wg.Done() } wg.Add(len(channels)) for _, c := range channels { go output(c) } // Start a goroutine to close out once all the output goroutines are // done. This must start after the wg.Add call. go func() { wg.Wait() close(out) }() return out } func (t Tool) GetAuthTokenHeaderName(resourceMgr tools.SourceProvider) (string, error) { source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind) if err != nil { return "", err } return source.GetAuthTokenHeaderName(), nil }