/
client.go
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/
client.go
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package bullettrain
import (
"context"
"fmt"
"reflect"
"strconv"
"github.com/go-resty/resty/v2"
)
// Client provides various methods to query BulletTrain API
type Client struct {
apiKey string
config Config
client *resty.Client
}
// DefaultClient returns new Client with default configuration
func DefaultClient(apiKey string) *Client {
return NewClient(apiKey, DefaultConfig())
}
// NewClient creates instance of Client with given configuration
func NewClient(apiKey string, config Config) *Client {
c := &Client{
apiKey: apiKey,
config: config,
client: resty.New(),
}
c.client.SetHeaders(map[string]string{
"Accept": "application/json",
"X-Environment-Key": c.apiKey,
})
return c
}
func (c *Client) SetProxy(proxyUrl string) {
c.client.SetProxy(proxyUrl)
}
func (c *Client) RemoveProxy() {
c.client.RemoveProxy()
}
// GetFeatures returns all features available in given environment
func (c *Client) GetFeatures() ([]Flag, error) {
return c.GetFeaturesWithContext(context.TODO())
}
// GetFeaturesWithContext returns all features available in given environment
func (c *Client) GetFeaturesWithContext(ctx context.Context) ([]Flag, error) {
flags := make([]Flag, 0)
_, err := c.client.NewRequest().
SetContext(ctx).
SetResult(&flags).
Get(c.config.BaseURI + "flags/")
return flags, err
}
// GetUserFeatures returns all features as defined for given user
func (c *Client) GetUserFeatures(user User) ([]Flag, error) {
return c.GetUserFeaturesWithContext(context.TODO(), user)
}
// GetUserFeaturesWithContext returns all features as defined for given user
func (c *Client) GetUserFeaturesWithContext(ctx context.Context, user User) ([]Flag, error) {
flags := make([]Flag, 0)
_, err := c.client.NewRequest().
SetContext(ctx).
SetResult(&flags).
Get(c.config.BaseURI + "flags/" + user.Identifier + "/")
return flags, err
}
// HasFeature returns information whether given feature is defined
func (c *Client) HasFeature(name string) (bool, error) {
return c.HasFeatureWithContext(context.TODO(), name)
}
// HasFeatureWithContext returns information whether given feature is defined
func (c *Client) HasFeatureWithContext(ctx context.Context, name string) (bool, error) {
flags, err := c.GetFeaturesWithContext(ctx)
if err != nil {
return false, err
}
return hasFeatureFlag(flags, name), nil
}
// HasUserFeature returns information whether given feature is defined for given user
func (c *Client) HasUserFeature(user User, name string) (bool, error) {
return c.HasUserFeatureWithContext(context.TODO(), user, name)
}
// HasUserFeatureWithContext returns information whether given feature is defined for given user
func (c *Client) HasUserFeatureWithContext(ctx context.Context, user User, name string) (bool, error) {
flags, err := c.GetUserFeaturesWithContext(ctx, user)
if err != nil {
return false, err
}
return hasFeatureFlag(flags, name), nil
}
// FeatureEnabled returns information whether given feature flag is enabled
func (c *Client) FeatureEnabled(name string) (bool, error) {
return c.FeatureEnabledWithContext(context.TODO(), name)
}
// FeatureEnabledWithContext returns information whether given feature flag is enabled
func (c *Client) FeatureEnabledWithContext(ctx context.Context, name string) (bool, error) {
flags, err := c.GetFeaturesWithContext(ctx)
if err != nil {
return false, err
}
flag := findFeatureFlag(flags, name)
return flag != nil && flag.Enabled, nil
}
// UserFeatureEnabled returns information whether given feature flag is enabled for given user
func (c *Client) UserFeatureEnabled(user User, name string) (bool, error) {
return c.UserFeatureEnabledWithContext(context.TODO(), user, name)
}
// UserFeatureEnabled returns information whether given feature flag is enabled for given user
func (c *Client) UserFeatureEnabledWithContext(ctx context.Context, user User, name string) (bool, error) {
flags, err := c.GetUserFeaturesWithContext(ctx, user)
if err != nil {
return false, err
}
flag := findFeatureFlag(flags, name)
return flag != nil && flag.Enabled, nil
}
// GetValue returns value of given feature (remote config)
//
// Returned value can have one of following types: bool, int, string
func (c *Client) GetValue(name string) (interface{}, error) {
return c.GetValueWithContext(context.TODO(), name)
}
// GetValueWithContext returns value of given feature (remote config)
//
// Returned value can have one of following types: bool, int, string
func (c *Client) GetValueWithContext(ctx context.Context, name string) (interface{}, error) {
flags, err := c.GetFeaturesWithContext(ctx)
if err != nil {
return "", err
}
flag := findFeatureFlag(flags, name)
if flag != nil {
return convertValue(flag.StateValue), nil
}
return "", fmt.Errorf("feature flag '%s' not found", name)
}
// GetUserValue return value of given feature (remote config) as defined for given user
//
// Returned value can have one of following types: bool, int, string
func (c *Client) GetUserValue(user User, name string) (interface{}, error) {
return c.GetUserValueWithContext(context.TODO(), user, name)
}
// GetUserValueWithContext return value of given feature (remote config) as defined for given user
//
// Returned value can have one of following types: bool, int, string
func (c *Client) GetUserValueWithContext(ctx context.Context, user User, name string) (interface{}, error) {
flags, err := c.GetUserFeaturesWithContext(ctx, user)
if err != nil {
return "", err
}
flag := findFeatureFlag(flags, name)
if flag != nil {
return convertValue(flag.StateValue), nil
}
return "", fmt.Errorf("feature flag '%s' not found", name)
}
// GetTrait returns trait defined for given user
func (c *Client) GetTrait(user User, key string) (*Trait, error) {
return c.GetTraitWithContext(context.TODO(), user, key)
}
// GetTraitWithContext returns trait defined for given user
func (c *Client) GetTraitWithContext(ctx context.Context, user User, key string) (*Trait, error) {
traits, err := c.GetTraitsWithContext(ctx, user, key)
if err != nil {
return nil, err
} else if len(traits) == 0 {
return nil, fmt.Errorf("trait '%s' not found", key)
}
t := traits[0]
t.Identity = user
return t, nil
}
// GetTraits returns traits defined for given user
//
// If keys are provided, GetTrais returns only corresponding traits,
// otherwise all traits for given user are returned.
func (c *Client) GetTraits(user User, keys ...string) ([]*Trait, error) {
return c.GetTraitsWithContext(context.TODO(), user, keys...)
}
// GetTraitsWithContext returns traits defined for given user
//
// If keys are provided, GetTrais returns only corresponding traits,
// otherwise all traits for given user are returned.
func (c *Client) GetTraitsWithContext(ctx context.Context, user User, keys ...string) ([]*Trait, error) {
resp := struct {
Flags []interface{} `json:"flags"`
Traits []*Trait `json:"traits"`
}{}
_, err := c.client.NewRequest().
SetContext(ctx).
SetResult(&resp).
SetQueryParam("identifier", user.Identifier).
Get(c.config.BaseURI + "identities/")
if err != nil {
return nil, err
}
if len(keys) == 0 {
return resp.Traits, nil
}
filtered := make([]*Trait, 0, len(keys))
for _, key := range keys {
for _, t := range resp.Traits {
if key == t.Key {
filtered = append(filtered, t)
continue
}
}
}
return filtered, nil
}
// UpdateTrait updates trait value
func (c *Client) UpdateTrait(user User, toUpdate *Trait) (*Trait, error) {
return c.UpdateTraitWithContext(context.TODO(), user, toUpdate)
}
// UpdateTraitWithContext updates trait vaule with context
func (c *Client) UpdateTraitWithContext(ctx context.Context, user User, toUpdate *Trait) (*Trait, error) {
toUpdate.Identity = user
trait := new(Trait)
_, err := c.client.NewRequest().
SetContext(ctx).
SetBody(toUpdate).
SetResult(trait).
Post(c.config.BaseURI + "traits/")
return trait, err
}
// UpdateTraits updates trait values in bulk.
// The object argument may be a []Trait, []*Trait or a struct.
// If object is []Trait or []*Trait then their Identity field may be mutated.
// If object is a struct then the struct will be inspected
// and each key value pair will be considered as a separate trait to be updated.
func (c *Client) UpdateTraits(user User, object interface{}) ([]*Trait, error) {
return c.UpdateTraitsWithContext(context.TODO(), user, object)
}
// UpdateTraitsWithContext updates trait values in bulk.
// The object argument may be a []Trait, []*Trait or a struct.
// If object is []Trait or []*Trait then their Identity field may be mutated.
// If object is a struct then the struct will be inspected
// and each key value pair will be considered as a separate trait to be updated.
func (c *Client) UpdateTraitsWithContext(ctx context.Context, user User, object interface{}) ([]*Trait, error) {
var bulkResp []*Trait = nil
var bulk []Trait = nil
switch traits := object.(type) {
case []*Trait:
bulk = make([]Trait, len(traits))
for idx, trait := range traits {
bulk[idx] = *trait
bulk[idx].Identity = user
}
case []Trait:
bulk = make([]Trait, len(traits))
for idx, trait := range traits {
bulk[idx] = trait
bulk[idx].Identity = user
}
default:
value := reflect.ValueOf(object)
typ := reflect.TypeOf(object)
for i := 0; i < value.NumField(); i++ {
field := value.Field(i)
toUpdate := Trait{}
switch field.Kind() {
case reflect.Bool:
toUpdate.Value = strconv.FormatBool(field.Bool())
case reflect.String:
toUpdate.Value = field.String()
case reflect.Int:
toUpdate.Value = strconv.FormatInt(field.Int(), 10)
case reflect.Float32, reflect.Float64:
toUpdate.Value = strconv.FormatFloat(field.Float(), 'f', -1, 64)
default:
return nil, fmt.Errorf("invalid type of field '%s' (bool, int and string are supported)", typ.Field(i).Name)
}
toUpdate.Identity = user
toUpdate.Key = typ.Field(i).Name
bulk = append(bulk, toUpdate)
}
}
bulkResp = make([]*Trait, len(bulk))
_, err := c.client.NewRequest().
SetContext(ctx).
SetBody(bulk).
SetResult(&bulkResp).
Put(c.config.BaseURI + "traits/bulk/")
return bulkResp, err
}
func findFeatureFlag(flags []Flag, name string) *Flag {
for i, flag := range flags {
if flag.Feature.Name == name {
return &flags[i]
}
}
return nil
}
func hasFeatureFlag(flags []Flag, name string) bool {
flag := findFeatureFlag(flags, name)
return flag != nil
}
// convertValue converts from float64 (default "JSON number" representation in Go) to int
func convertValue(value interface{}) interface{} {
switch v := value.(type) {
case float64:
return int(v)
default:
return value
}
}