Camber.choice: def of bend-kit-camber@0.15.0.1
Import: import bend-kit-camber@0.15.0.1/camber.bend as Camber
Lines 856-878 of bend-kit-camber@0.15.0.1/camber.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-camber@0.15.0.1/camber.bend&start_line=856&end_line=878

import Base
import bend-kit-http@0.38.1.1/http.bend as Http
import bend-kit-router@0.2.0.0/router.bend as Router
import bend-kit-router@0.2.0.0/target.bend as Target

def choice(~A: Data, ~S: Type, ~K: Data, ~E: Data, ~H: Data,
  ~before_hook: H -> S -> K -> Metadata -> IO(Step<S, E>),
  ~after_hook: H -> S -> K -> Http.Res -> IO(S & Result<&2, &1, Error<E>, Http.Res>),
  ~run: A -> S -> K -> Match<Policy<H>> -> Http.Req -> IO(S & Result<&2, &1, Error<E>, Http.Res>),
  ~mapper: S -> K -> Error<E> -> IO(S & Result<&2, &1, Error<E>, Http.Res>),
  selected: Router.Choice<Endpoint<A, Policy<H>>>, target: Target.Target,
  groups: List<&2, GroupPlan<Policy<H>>>, state: S, +config: K, +meta: Metadata, entered: List<&2, Policy<H>>, body: Http.Body
) -> IO(Completion<S, H>):
  match selected:
    case Router.NotFound{}:
      framework(~S, ~K, ~E, ~H, ~mapper, 404, "", state, config, entered, body)
    case Router.MethodMissing{ids, allow}:
      policies = groups.prepared(~Policy<H>, groups, ids)
      scopes(~S, ~K, ~E, ~H, ~before_hook, ~after_hook, ~mapper, policies, state, config, meta, entered, body,
        s => entered => b => framework(~S, ~K, ~E, ~H, ~mapper, 405, allow, s, config, entered, b))
    case Router.Options{ids, allow}:
      policies = groups.prepared(~Policy<H>, groups, ids)
      scopes(~S, ~K, ~E, ~H, ~before_hook, ~after_hook, ~mapper, policies, state, config, meta, entered, body,
        s => entered => b => framework(~S, ~K, ~E, ~H, ~mapper, 204, allow, s, config, entered, b))
    case Router.Found{Endpoint{action, +policies}, params, ids, method, pattern}:
      selected = {Match{target, params, ids, method, pattern, policies} : Match<Policy<H>>}
      scopes(~S, ~K, ~E, ~H, ~before_hook, ~after_hook, ~mapper, policies.tail(~H, policies), state, config, meta, entered, body,
        s => entered => b => endpoint(~A, ~S, ~K, ~E, ~H, ~run, ~mapper, action, s, config, selected, meta, entered, b))

Uses (22):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Completion
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Endpoint
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=GroupPlan
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Match
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Metadata
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Policy
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=Step
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=endpoint
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=framework
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=groups.prepared
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=policies.tail
  https://jend.leeeet.dev/definition.txt?path=bend-kit-camber@0.15.0.1/camber.bend&name=scopes
  https://jend.leeeet.dev/definition.txt?path=bend-kit-http@0.38.2.0/http.bend&name=Body
  https://jend.leeeet.dev/definition.txt?path=bend-kit-http@0.38.2.0/http.bend&name=Req
  https://jend.leeeet.dev/definition.txt?path=bend-kit-http@0.38.2.0/http.bend&name=Res
  https://jend.leeeet.dev/definition.txt?path=bend-kit-router@0.2.0.0/router.bend&name=Choice
  https://jend.leeeet.dev/definition.txt?path=bend-kit-router@0.2.0.0/target.bend&name=Target