service_instances.go

package cfclient

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"net/url"

	"github.com/pkg/errors"
)

type ServiceInstancesResponse struct {
	Count     int                       `json:"total_results"`
	Pages     int                       `json:"total_pages"`
	NextUrl   string                    `json:"next_url"`
	Resources []ServiceInstanceResource `json:"resources"`
}

type ServiceInstanceRequest struct {
	Name            string                 `json:"name"`
	SpaceGuid       string                 `json:"space_guid"`
	ServicePlanGuid string                 `json:"service_plan_guid"`
	Parameters      map[string]interface{} `json:"parameters,omitempty"`
	Tags            []string               `json:"tags,omitempty"`
}

type ServiceInstanceUpdateRequest struct {
	Name            string                 `json:"name,omitempty"`
	ServicePlanGuid string                 `json:"service_plan_guid,omitempty"`
	Parameters      map[string]interface{} `json:"parameters,omitempty"`
	Tags            []string               `json:"tags,omitempty"`
}

type ServiceInstanceResource struct {
	Meta   Meta            `json:"metadata"`
	Entity ServiceInstance `json:"entity"`
}

type ServiceInstance struct {
	Name                         string                 `json:"name"`
	CreatedAt                    string                 `json:"created_at"`
	UpdatedAt                    string                 `json:"updated_at"`
	Credentials                  map[string]interface{} `json:"credentials"`
	ServicePlanGuid              string                 `json:"service_plan_guid"`
	SpaceGuid                    string                 `json:"space_guid"`
	DashboardUrl                 string                 `json:"dashboard_url"`
	Type                         string                 `json:"type"`
	LastOperation                LastOperation          `json:"last_operation"`
	Tags                         []string               `json:"tags"`
	ServiceGuid                  string                 `json:"service_guid"`
	SpaceUrl                     string                 `json:"space_url"`
	ServicePlanUrl               string                 `json:"service_plan_url"`
	ServiceBindingsUrl           string                 `json:"service_bindings_url"`
	ServiceKeysUrl               string                 `json:"service_keys_url"`
	ServiceInstanceParametersUrl string                 `json:"service_instance_parameters_url"`
	SharedFromUrl                string                 `json:"shared_from_url"`
	SharedToUrl                  string                 `json:"shared_to_url"`
	RoutesUrl                    string                 `json:"routes_url"`
	ServiceUrl                   string                 `json:"service_url"`
	Guid                         string                 `json:"guid"`
	c                            *Client
}

type LastOperation struct {
	Type        string `json:"type"`
	State       string `json:"state"`
	Description string `json:"description"`
	UpdatedAt   string `json:"updated_at"`
	CreatedAt   string `json:"created_at"`
}

func (c *Client) ListServiceInstancesByQuery(query url.Values) ([]ServiceInstance, error) {
	var instances []ServiceInstance

	requestUrl := "/v2/service_instances?" + query.Encode()
	for {
		sir, err := c.getServiceInstancesResponse(requestUrl)
		if err != nil {
			return instances, err
		}
		for _, instance := range sir.Resources {
			instances = append(instances, c.mergeServiceInstance(instance))
		}
		requestUrl = sir.NextUrl
		if requestUrl == "" || query.Get("page") != "" {
			break
		}
	}
	return instances, nil
}

func (c *Client) ListServiceInstances() ([]ServiceInstance, error) {
	return c.ListServiceInstancesByQuery(nil)
}

func (c *Client) GetServiceInstanceParams(guid string) (map[string]interface{}, error) {
	req := c.NewRequest("GET", "/v2/service_instances/"+guid+"/parameters")
	res, err := c.DoRequest(req)
	if err != nil {
		return nil, errors.Wrap(err, "Error requesting service instance parameters")
	}

	defer res.Body.Close()

	var result map[string]interface{}
	err = json.NewDecoder(res.Body).Decode(&result)
	if err != nil {
		return nil, errors.Wrap(err, "Error JSON parsing service instance parameters")
	}

	return result, nil
}

func (c *Client) GetServiceInstanceByGuid(guid string) (ServiceInstance, error) {
	var sir ServiceInstanceResource
	req := c.NewRequest("GET", "/v2/service_instances/"+guid)
	res, err := c.DoRequest(req)
	if err != nil {
		return ServiceInstance{}, errors.Wrap(err, "Error requesting service instance")
	}
	defer res.Body.Close()
	data, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return ServiceInstance{}, errors.Wrap(err, "Error reading service instance response")
	}
	err = json.Unmarshal(data, &sir)
	if err != nil {
		return ServiceInstance{}, errors.Wrap(err, "Error JSON parsing service instance response")
	}
	return c.mergeServiceInstance(sir), nil
}

func (c *Client) ServiceInstanceByGuid(guid string) (ServiceInstance, error) {
	return c.GetServiceInstanceByGuid(guid)
}

func (c *Client) getServiceInstancesResponse(requestUrl string) (ServiceInstancesResponse, error) {
	var serviceInstancesResponse ServiceInstancesResponse
	r := c.NewRequest("GET", requestUrl)
	resp, err := c.DoRequest(r)
	if err != nil {
		return ServiceInstancesResponse{}, errors.Wrap(err, "Error requesting service instances")
	}
	defer resp.Body.Close()
	resBody, err := ioutil.ReadAll(resp.Body)

	if err != nil {
		return ServiceInstancesResponse{}, errors.Wrap(err, "Error reading service instance request")
	}
	err = json.Unmarshal(resBody, &serviceInstancesResponse)
	if err != nil {
		return ServiceInstancesResponse{}, errors.Wrap(err, "Error unmarshalling service instance")
	}
	return serviceInstancesResponse, nil
}

func (c *Client) mergeServiceInstance(instance ServiceInstanceResource) ServiceInstance {
	instance.Entity.Guid = instance.Meta.Guid
	instance.Entity.CreatedAt = instance.Meta.CreatedAt
	instance.Entity.UpdatedAt = instance.Meta.UpdatedAt
	instance.Entity.c = c
	return instance.Entity
}

func (c *Client) CreateServiceInstance(req ServiceInstanceRequest) (ServiceInstance, error) {
	var sir ServiceInstanceResource

	buf := bytes.NewBuffer(nil)
	err := json.NewEncoder(buf).Encode(req)
	if err != nil {
		return ServiceInstance{}, err
	}

	r := c.NewRequestWithBody("POST", "/v2/service_instances?accepts_incomplete=true", buf)

	res, err := c.DoRequest(r)
	if err != nil {
		return ServiceInstance{}, err
	}

	defer res.Body.Close()
	if res.StatusCode != http.StatusAccepted && res.StatusCode != http.StatusCreated {
		return ServiceInstance{}, errors.Wrapf(err, "Error creating service, response code: %d", res.StatusCode)
	}

	data, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return ServiceInstance{}, errors.Wrap(err, "Error reading service instance response")
	}

	err = json.Unmarshal(data, &sir)
	if err != nil {
		return ServiceInstance{}, errors.Wrap(err, "Error JSON parsing service instance response")
	}

	return c.mergeServiceInstance(sir), nil
}

func (c *Client) UpdateSI(serviceInstanceGuid string, req ServiceInstanceUpdateRequest, async bool) error {
	buf := bytes.NewBuffer(nil)
	err := json.NewEncoder(buf).Encode(req)
	if err != nil {
		return err
	}
	return c.UpdateServiceInstance(serviceInstanceGuid, buf, async)
}

func (c *Client) UpdateServiceInstance(serviceInstanceGuid string, updatedConfiguration io.Reader, async bool) error {
	u := fmt.Sprintf("/v2/service_instances/%s?accepts_incomplete=%t", serviceInstanceGuid, async)
	resp, err := c.DoRequest(c.NewRequestWithBody("PUT", u, updatedConfiguration))
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusAccepted {
		return errors.Wrapf(err, "Error updating service instance %s, response code %d", serviceInstanceGuid, resp.StatusCode)
	}
	return nil
}

func (c *Client) DeleteServiceInstance(guid string, recursive, async bool) error {
	resp, err := c.DoRequest(c.NewRequest("DELETE", fmt.Sprintf("/v2/service_instances/%s?recursive=%t&accepts_incomplete=%t&async=%t", guid, recursive, async, async)))
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusAccepted {
		return errors.Wrapf(err, "Error deleting service instance %s, response code %d", guid, resp.StatusCode)
	}
	return nil
}