alexkappa/terraform-provider-auth0

package auth0

import (
    "errors"
    "fmt"

    "github.com/hashicorp/terraform-plugin-sdk/helper/schema"
    "gopkg.in/auth0.v5"
    "gopkg.in/auth0.v5/management"
)

func newDataClient() *schema.Resource {
    return &schema.Resource{
        Read:   readDataClient,
        Schema: newClientSchema(),
    }
}

func newClientSchema() map[string]*schema.Schema {
    clientSchema := datasourceSchemaFromResourceSchema(newClient().Schema)
    delete(clientSchema, "client_secret_rotation_trigger")
    delete(clientSchema, "client_secret")
    addOptionalFieldsToSchema(clientSchema, "name", "client_id")
    return clientSchema
}

func readDataClient(d *schema.ResourceData, m interface{}) error {
    clientId := auth0.StringValue(String(d, "client_id"))
    if clientId != "" {
        d.SetId(clientId)
        return readClient(d, m)
    }

    //If not provided ID, perform looking of client by name
    name := auth0.StringValue(String(d, "name"))
    if name == "" {
        return errors.New("no 'client_id' or 'name' was specified")
    }

    api := m.(*management.Management)
    clients, err := api.Client.List(management.IncludeFields("client_id", "name"))
    if err != nil {
        return err
    }
    for _, client := range clients.Clients {
        if auth0.StringValue(client.Name) == name {
            clientId = auth0.StringValue(client.ClientID)
            d.SetId(clientId)
            return readClient(d, m)
        }
    }
    return fmt.Errorf("no client found with 'name' = '%s'", name)
}