Go Recurly

Recurly is a Go (golang) API Client for the Recurly API.

References

• API Reference
• Recurly API Documentation
• recurly.js Documentation
• Documentation and examples below. Unit tests also provide thorough examples.

Installation

Install using the "go get" command:

go get github.com/blacklightcms/go-recurly/recurly

Example

import "github.com/blacklightcms/go-recurly/recurly"

Construct a new Recurly Client and then work off of that. For example, to list accounts:

client, err := recurly.NewClient("subdomain", "apiKey", nil)
resp, accounts, err := client.Accounts.List({"per_page": 20})

recurly.Response embeds http.Response and provides some convenience methods:

if resp.IsOK() {
    fmt.Println("Response was a 200-299 status code")
}

if resp.IsError() {
    fmt.Println("Response was NOT a 200-299 status code")

    // Loop through errors (422 status code only)
    for _, e := range resp.Errors() {
        fmt.Printf("Message: %s; Field: %s; Symbol: %s\n", e.Message, e.Field, e.Symbol)
    }
}

if resp.IsClientError() {
    fmt.Println("You messed up. Response was a 400-499 status code")
}

if resp.IsServerError() {
    fmt.Println("Try again later. Response was a 500-599 status code")
}

// Get status code from http.response
if resp.StatusCode == 422 {
    // ...
}

Usage

The basic usage format is to create a client, and then operate directly off of each of the services.

The services are (each link to the GoDoc documentation):

• Accounts
• Adjustments
• Billing
• Coupons
• Redemptions
• Invoices
• Plans
• AddOns
• Subscriptions
• Transactions

Each of the services correspond to their respective sections in the Recurly API Documentation.

Here are a few examples:

Create Account

resp, a, err := client.Accounts.Create(recurly.Account{
    Code: "1",
    FirstName: "Verena",
    LastName: "Example",
    Email: "verena@example.com"
})

if resp.IsOK() {
    log.Printf("Account successfully created. Hosted Login Token: %s", a.HostedLoginToken)
}

Get Account

resp, a, err := client.Accounts.Get("1")
if resp.IsOK() {
    log.Printf("Account Found: %+v", a)
}

Get Accounts (pagination example)

All paginated methods (usually named List or List*) support a per_page and cursor parameter. Example usage:

resp, accounts, err := client.Accounts.List(recurly.Params{"per_page": 10})

if resp.IsError() {
    // Error occurred
}

for i, a := range accounts {
    // Loop through accounts
}

// Check for next page
next := resp.Next()
if next == "" {
    // No next page
}

// Retrieve next page
resp, accounts, err := client.Accounts.Get(recurly.Params{
    "per_page": 10,
    "cursor": next,
})

// Check for prev page
prev := resp.Prev()
if prev == "" {
    // No prev page
}

// Retrieve prev page
resp, accounts, err := client.Accounts.Get(recurly.Params{
    "per_page": 10,
    "cursor": prev,
})

Close account

resp, err := client.Accounts.Close("1")

Reopen account

resp, err := client.Accounts.Reopen("1")

Create Billing Info Using recurly.js Token

// 1 is the account code
resp, b, err := client.Billing.CreateWithToken("1", token)

Update Billing Info Using recurly.js Token

// 1 is the account code
resp, b, err := client.Billing.UpdateWithToken("1", token)

Create Billing with Credit Card

resp, b, err := client.Billing.Create("1", Billing{
    FirstName: "Verena",
    LastName:  "Example",
    Address:   "123 Main St.",
    City:      "San Francisco",
    State:     "CA",
    Zip:       "94105",
    Country:   "US",
    Number:    4111111111111111,
    Month:     10,
    Year:      2020,
})

Create Billing With Bank account

resp, b, err := client.Billing.Create("134", Billing{
    FirstName:     "Verena",
    LastName:      "Example",
    Address:       "123 Main St.",
    City:          "San Francisco",
    State:         "CA",
    Zip:           "94105",
    Country:       "US",
    NameOnAccount: "Acme, Inc",
    RoutingNumber: "123456780",
    AccountNumber: "111111111",
    AccountType:   "checking",
})

Creating Transactions and Subscriptions

Transactions and subscriptions have different formats for creating and reading. Due to that, they have a special use case when creating -- there is a NewTransaction and NewSubscription struct respectively. These structs are only used for creating.

When updating a subscription, you should use the UpdateSubscription struct. All other creates/updates throughout use the same struct to create/update as to read.

// s will return a Subscription struct after creating using the
// NewSubscription struct.
resp, s, err := client.Subscriptions.Create(recurly.NewSubscription{
    Code: "gold",
    Currency: "EUR",
    Account: recurly.Account{
        Code: "b6f5783",
        Email: "verena@example.com",
        FirstName: "Verena",
        LastName: "Example",
        BillingInfo: &recurly.Billing{
            Number: 4111111111111111,
            Month: 12,
            Year: 2017,
            VerificationValue: 123,
            Address: "400 Alabama St",
            City: "San Francisco",
            State: "CA",
            Zip: "94110",
        }
    }
})

Working with Null* Types

This package has a few null types that ensure that zero values will marshal or unmarshal properly.

For example, booleans have a zero value of false in Go. If you need to explicitly send a false value, go will see that as a zero value and the omitempty option will ensure it doesn't get sent.

Likewise if you attempt to unmarshal empty/nil values into a struct, you will also get errors. The Null types help ensure things work as expected.

NullBool

NullBool is a basic struct that looks like this:

NullBool struct {
    Bool  bool
    Valid bool
}

The Valid field determines if the boolean value stored in Bool was intentionally set there, or if it should be discarded since the default will be false.

Here's how to work with NullBool:

// Create a new NullBool:
t := recurly.NewBool(true)

// Check if the value held in the bool is what you expected
fmt.Printf("%v", t.Is(true)) // true
fmt.Printf("%v", t.Is(false)) // false

If, however, NullBool looked like this:

recurly.NullBool{
    Bool: false,
    Valid: false,
}

Then those checks will always return false:

fmt.Printf("%v", t.Is(true)) // false
fmt.Printf("%v", t.Is(false)) // false

NullInt

NullInt works the same way as NullBool, but for integers.

i := recurly.NewInt(0)
i = recurly.NewInt(1)
i = recurly.NewInt(50)

NullTime

NullTime won't breakdown if an empty string / nil value is returned from the Recurly API. It also ensures times are always in UTC.

t := time.Now()
nt := recurly.NewTime(t) // time is now in UTC
fmt.Println(t.String()) // 2015-08-03T19:11:33Z

HREF type

The HREF type handles links returned from Recurly like this:

<subscriptions type="array">
  <subscription href="https://your-subdomain.recurly.com/v2/subscriptions/44f83d7cba354d5b84812419f923ea96">
    <account href="https://your-subdomain.recurly.com/v2/accounts/1"/>
    <invoice href="https://your-subdomain.recurly.com/v2/invoices/1108"/>
    <uuid>44f83d7cba354d5b84812419f923ea96</uuid>
    <state>active</state>
    <!-- ... -->
  </subscription>
</subscriptions>

In the Subscription struct, Account and Invoice are HREF types that will look like this:

expected := Subscription{
    Account: href{
        HREF: "https://your-subdomain.recurly.com/v2/accounts/1",
        Code: "1",
    },
    Invoice: href{
        HREF: "https://your-subdomain.recurly.com/v2/invoices/1108",
        Code: "1108",
    },
}

You can then use s.Account.Code to retrieve account info, or s.Invoice.Code to retrieve invoice info.

Transaction errors

In addition to the Errors property in the recurly.Response, response also contains a TransactionError field for Transaction Errors.

Be sure to check resp.TransactionError for any API calls that may return a transaction error for additional info. The TransactionError struct is defined like this:

TransactionError struct {
	XMLName          xml.Name `xml:"transaction_error"`
	ErrorCode        string   `xml:"error_code,omitempty"`
	ErrorCategory    string   `xml:"error_category,omitempty"`
	MerchantMessage  string   `xml:"merchant_message,omitempty"`
	CustomerMessage  string   `xml:"customer_message,omitempty"`
	GatewayErrorCode string   `xml:"gateway_error_code,omitempty"`
}

Link to transaction error documentation.

Roadmap

The API should now be mostly stable. I'm going to leave this notice here for a bit in case any one in the community has comments or suggestions for improvements.

The API is still being finalized and may change over the coming weeks. Here is what's coming before things stabilize:

• Support for paginating beyond the first page with cursors needs to be completed
• Coupons, coupon redemptions, invoices, and transactions. All other portions of the API are complete.
• Documentation and more usage examples.
• There is currently no support for updating billing info with a credit card or bank account directly. Using recurly.js token is the only supported method currently. Because the the token method using recurly.js is the recommended method, this is currently a low priority. The placeholder functions are already in place so this will not affect API stability of the library.
• Webhook support. This will come last after API stability.

Once that notice is removed things will be stable. Contributions are welcome.

License

go-recurly is available under the MIT License.