stripe-clojure.http.util — io.github.yonureker/stripe-clojure 1.1.0

flatten-params clj

(flatten-params params)

Recursively flattens a nested map into a single-level map with keys formatted in a way that matches Stripe API's expectations for form data.

Transformations performed:

1. Kebab-case keys are converted to snake_case (e.g., :first-name → "first_name")
2. Nested maps use bracket notation (e.g., {:customer {:name "Jane"}} → {"customer[name]" "Jane"})
3. Arrays/collections use indexed brackets (e.g., {:items [{:price "x"}]} → {"items[0][price]" "x"})
4. String values are preserved as-is (not treated as collections)

Parameters:

• params: A nested map of parameters.

Returns: A flat map with formatted keys suitable for Stripe API requests.

format-expand clj

(format-expand expand)

Converts an expand parameter (either a single string or a sequence of strings) into the indexed format required by Stripe's API.

Transformations performed:

1. Single string is wrapped in a vector first
2. Each value is assigned an indexed key: "expand[0]", "expand[1]", etc.
3. Returns an empty map if the input is nil or empty

Examples:

Single field: (format-expand "customer") => {"expand[0]" "customer"}

Multiple fields: (format-expand ["customer", "invoice.subscription"]) => {"expand[0]" "customer", "expand[1]" "invoice.subscription"}

Empty input: (format-expand nil) => {}

Parameters:

• expand: Either a string or a sequence of strings representing the fields to expand.

Returns: A map with formatted expand parameters suitable for Stripe API requests.

transform-keys clj

(transform-keys m)

Recursively transforms all keys in a map from underscore_case to kebab-case.

This function walks through the map (including nested maps and vectors) and converts each keyword key to kebab-case. It leverages transients for efficient accumulation on larger maps.

Parameters:

• m: A map whose keys need to be transformed. If m is not a map, it's returned unchanged.

Returns: A new map with all keys converted to kebab-case.

Example: (transform-keys {:some_key {:nested_key "value"}}) => {:some-key {:nested-key "value"}}

underscore-to-kebab clj

(underscore-to-kebab s)

Converts a string from underscore_case to kebab-case.

Examples:

• "hello_mello" => "hello-mello"
• "some_example_string" => "some-example-string"

Parameters:

• s: A string in underscore_case.

Returns: A kebab-case version of the input string.