Allow customer_id to be specified in identify URL

CHANGELOG.markdown

@@ -1,3 +1,8 @@
+## Customerio 5.3.0 - December 8, 2023
+### Changed
+- The `identify` method has been updated to allow the customer ID to be specified separately from the attributes, using the `customer_id` attribute. This allows a person to be updated by identifying them by e.g.: their email address. Thanks to trwalzer, jrbeck and jeremyw for the original changes that this is based on.
+- It is no longer possible to set the `customer_id` attribute on a person. This is a side-effect of the changes to the `identify` method.
+
 ## Customerio 5.2.0 - December 8, 2023
 ### Changed
 - The `identify` method will now automatically use the `cio_id` attribute as the customer ID when calling the track service. This allows a customer to be updated using `identify` to modify the `id` and `email` attributes.

README.md

@@ -95,7 +95,7 @@ $customerio.identify(
 )
 ```
 
-### Updating customers
+### Updating customers: Changing identifiers
 
 You can use the identify operation to update customers.
 If you need to change the `id` or `email` identifiers for a customer,
@@ -113,6 +113,35 @@ $customerio.identify(
 )
 ```
 
+This method requires either the `id` or `cio_id` for the person. It does not work with email addresses.
+
+You can also use this method to make other updates to the person using the `cio_id`.
+
+### Updating customers: Using email address
+
+If you need to identify a person using their email address, then you can do so
+by passing in a customer ID to the `identify` method. This allows you to specify
+a customer ID that is different than the one used in the `id` attribute. E.g.:
+
+```ruby
+# Arguments
+# customer_id (required) - the customer ID to use for this customer, may be an id, email address, or the cio_id.
+#                         This will be used to construct the URL but not sent in the body attributes.
+# attributes (required) - a hash of information about the customer. You can pass any
+#                         information that would be useful in your triggers. You
+#                         must at least pass in an id, email, and created_at timestamp.
+
+$customerio.identify(
+  :customer_id => "bob@example.com",
+  :location => "Australia"
+)
+```
+
+Note:
+
+ * If you want to use the `cio_id` in the `customer_id` field of `identify_customer_id`, you will need to prefix it with `"cio_"`. E.g.: `"cio_f000000d"` for a `cio_id` of `f000000d`.
+ * The `identify` method can identify the person using one of `customer_id`, `cio_id` or `id`. The order of precedence is `customer_id` > `cio_id` > `id`.
+
 ### Deleting customers
 
 Deleting a customer will remove them, and all their information from

lib/customerio/client.rb

@@ -151,16 +151,33 @@ def merge_customers_path
 
     def create_or_update(attributes = {})
       attributes = Hash[attributes.map { |(k,v)| [ k.to_sym, v ] }]
-      if is_empty?(attributes[:id]) && is_empty?(attributes[:cio_id])
+      if is_empty?(attributes[:id]) && is_empty?(attributes[:cio_id]) && is_empty?(attributes[:customer_id])
         raise MissingIdAttributeError.new("Must provide a customer id")
       end
 
       # Use cio_id as the identifier, if present,
       # to allow the id and email identifiers to be updated.
+      # The person is identified by a customer ID, which is included
+      # in the path to the Track v1 API. Choose the ID in this order
+      # from highest to lowest precedence:
+      #
+      # 1. customer_id: "id", an email address, or "cio_id" value.
+      #    Any "cio_id" values need to be prefixed "cio_"
+      #    so that the Track v1 API knows it's a cio_id.
+      #
+      # 2. cio_id: The cio_id value (no prefix required).
+      #
+      # 3. id: The id value.
       customer_id = attributes[:id]
       if !is_empty?(attributes[:cio_id])
         customer_id = "cio_" + attributes[:cio_id]
       end
+      if !is_empty?(attributes[:customer_id])
+        customer_id = attributes[:customer_id]
+      end
+      # customer_id is not an attribute, so remove it.
+      attributes.delete(:customer_id)
+
       url = customer_path(customer_id)
       @client.request_and_verify_response(:put, url, attributes)
     end

lib/customerio/version.rb

@@ -1,3 +1,3 @@
 module Customerio
-  VERSION = "5.2.0"
+  VERSION = "5.3.0"
 end

spec/client_spec.rb

@@ -173,6 +173,7 @@ def json(data)
       lambda { client.identify(email: "customer@example.com") }.should raise_error(Customerio::Client::MissingIdAttributeError)
       lambda { client.identify(id: "") }.should raise_error(Customerio::Client::MissingIdAttributeError)
       lambda { client.identify(cio_id: "") }.should raise_error(Customerio::Client::MissingIdAttributeError)
+      lambda { client.identify(customer_id: "") }.should raise_error(Customerio::Client::MissingIdAttributeError)
     end
 
     it 'should not raise errors when attribute keys are strings' do
@@ -223,6 +224,39 @@ def json(data)
         location: "here"
       })
     end
+
+    it "uses provided id rather than id" do
+      stub_request(:put, api_uri('/api/v1/customers/1234')).
+        with(body: json(id: "5")).
+        to_return(status: 200, body: "", headers: {})
+
+      client.identify(
+        customer_id: "1234",
+        id: "5"
+      )
+    end
+
+    it "uses provided cio_id rather than id" do
+      stub_request(:put, api_uri('/api/v1/customers/cio_5')).
+        with(body: json(id: "5")).
+        to_return(status: 200, body: "", headers: {})
+
+      client.identify(
+        customer_id: "cio_5",
+        id: "5"
+      )
+    end
+
+    it "uses provided email rather than id" do
+      stub_request(:put, api_uri('/api/v1/customers/customer@example.com')).
+        with(body: json(id: "5")).
+        to_return(status: 200, body: "", headers: {})
+
+      client.identify(
+        customer_id: "customer@example.com",
+        id: "5"
+      )
+    end
   end
 
   describe "#delete" do
@@ -650,7 +684,7 @@ def json(data)
       }.to raise_error(Customerio::Client::ParamError, 'timestamp must be a valid timestamp')
     end
   end
-  
+
   describe "#merge_customers" do
     before(:each) do
       @client = Customerio::Client.new("SITE_ID", "API_KEY", :json => true)