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types.ts
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types.ts
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/* eslint-disable @typescript-eslint/no-unused-vars */
/* eslint-disable @typescript-eslint/no-explicit-any */
/* eslint-disable @typescript-eslint/ban-types */
import type { Context } from './context.ts'
import type { Hono } from './hono.ts'
import type { StatusCode } from './utils/http-status.ts'
import type { IntersectNonAnyTypes, UnionToIntersection } from './utils/types.ts'
////////////////////////////////////////
////// //////
////// Values //////
////// //////
////////////////////////////////////////
export type Bindings = Record<string, unknown>
export type Variables = Record<string, unknown>
export type Env = {
Bindings?: Bindings
Variables?: Variables
}
export type Next = () => Promise<void>
export type Input = {
in?: Partial<ValidationTargets>
out?: Partial<{ [K in keyof ValidationTargets]: unknown }>
}
////////////////////////////////////////
////// //////
////// Handlers //////
////// //////
////////////////////////////////////////
type HandlerResponse<O> = Response | TypedResponse<O> | Promise<Response | TypedResponse<O>>
export type Handler<
E extends Env = any,
P extends string = any,
I extends Input = Input,
R extends HandlerResponse<any> = any
> = (c: Context<E, P, I>, next: Next) => R
export type MiddlewareHandler<
E extends Env = any,
P extends string = string,
I extends Input = {}
> = (c: Context<E, P, I>, next: Next) => Promise<Response | void>
export type H<
E extends Env = any,
P extends string = any,
I extends Input = {},
R extends HandlerResponse<any> = any
> = Handler<E, P, I, R> | MiddlewareHandler<E, P, I>
export type NotFoundHandler<E extends Env = any> = (c: Context<E>) => Response | Promise<Response>
export type ErrorHandler<E extends Env = any> = (
err: Error,
c: Context<E>
) => Response | Promise<Response>
////////////////////////////////////////
////// //////
////// HandlerInterface //////
////// //////
////////////////////////////////////////
export interface HandlerInterface<
E extends Env = Env,
M extends string = string,
S extends Schema = {},
BasePath extends string = '/'
> {
//// app.get(...handlers[])
// app.get(handler)
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
I extends Input = {},
R extends HandlerResponse<any> = any,
E2 extends Env = E
>(
handler: H<E2, P, I, R>
): Hono<E, S & ToSchema<M, P, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(handler, handler)
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
I extends Input = {},
R extends HandlerResponse<any> = any,
E2 extends Env = E,
E3 extends Env = IntersectNonAnyTypes<[E, E2]>
>(
...handlers: [H<E2, P, I, R>, H<E3, P, I, R>]
): Hono<E, S & ToSchema<M, P, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(handler x 3)
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = IntersectNonAnyTypes<[E, E2, E3]>
>(
...handlers: [H<E2, P, I, R>, H<E3, P, I2, R>, H<E4, P, I3, R>]
): Hono<E, S & ToSchema<M, P, I3['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(handler x 4)
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I & I2 & I3,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4]>
>(
...handlers: [H<E2, P, I, R>, H<E3, P, I2, R>, H<E4, P, I3, R>, H<E5, P, I3, R>]
): Hono<E, S & ToSchema<M, P, I4['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(handler x 5)
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I2 & I3,
I5 extends Input = I & I2 & I3 & I4,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = E,
E6 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4, E5]>
>(
...handlers: [
H<E2, P, I, R>,
H<E3, P, I2, R>,
H<E4, P, I3, R>,
H<E5, P, I3, R>,
H<E6, P, I3, R>
]
): Hono<E, S & ToSchema<M, P, I5['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(...handlers[])
<
P extends string = ExtractKey<S> extends never ? BasePath : ExtractKey<S>,
I extends Input = {},
R extends HandlerResponse<any> = any
>(
...handlers: H<E, P, I, R>[]
): Hono<E, S & ToSchema<M, P, I['in'], MergeTypedResponseData<R>>, BasePath>
//// app.get(path)
// app.get(path)
<P extends string, R extends HandlerResponse<any> = any, I extends Input = {}>(path: P): Hono<
E,
S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>,
BasePath
>
//// app.get(path, ...handlers[])
// app.get(path, handler)
<
P extends string,
P2 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
E2 extends Env = E
>(
path: P,
handler: H<E2, MergePath<BasePath, P2>, I, R>
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(path, handler, handler)
<
P extends string,
P2 extends string = P,
P3 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
E2 extends Env = E,
E3 extends Env = IntersectNonAnyTypes<[E, E2]>
>(
path: P,
...handlers: [H<E2, MergePath<BasePath, P2>, I, R>, H<E3, MergePath<BasePath, P3>, I, R>]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(path, handler x3)
<
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = IntersectNonAnyTypes<[E, E2, E3]>
>(
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I3['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(path, handler x4)
<
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
P5 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I & I2 & I3,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4]>
>(
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>,
H<E5, MergePath<BasePath, P5>, I4, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I4['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(path, handler x5)
<
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
P5 extends string = P,
P6 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I2 & I3,
I5 extends Input = I & I2 & I3 & I4,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = E,
E6 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4, E5]>
>(
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>,
H<E5, MergePath<BasePath, P5>, I4, R>,
H<E6, MergePath<BasePath, P6>, I5, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I5['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(path, ...handlers[])
<P extends string, I extends Input = {}, R extends HandlerResponse<any> = any>(
path: P,
...handlers: H<E, MergePath<BasePath, P>, I, R>[]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>, BasePath>
}
////////////////////////////////////////
////// //////
////// MiddlewareHandlerInterface //////
////// //////
////////////////////////////////////////
export interface MiddlewareHandlerInterface<
E extends Env = Env,
S extends Schema = {},
BasePath extends string = '/'
> {
//// app.get(...handlers[])
<E2 extends Env = E>(
...handlers: MiddlewareHandler<E2, MergePath<BasePath, ExtractKey<S>>>[]
): Hono<E, S, BasePath>
//// app.get(path, ...handlers[])
<P extends string, E2 extends Env = E>(
path: P,
...handlers: MiddlewareHandler<E2, MergePath<BasePath, P>>[]
): Hono<E, S, BasePath>
}
////////////////////////////////////////
////// //////
////// OnHandlerInterface //////
////// //////
////////////////////////////////////////
export interface OnHandlerInterface<
E extends Env = Env,
S extends Schema = {},
BasePath extends string = '/'
> {
// app.on(method, path, handler, handler)
<
M extends string,
P extends string,
P2 extends string = P,
P3 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
E2 extends Env = E,
E3 extends Env = IntersectNonAnyTypes<[E, E2]>
>(
method: M,
path: P,
...handlers: [H<E2, MergePath<BasePath, P2>, I, R>, H<E3, MergePath<BasePath, P3>, I, R>]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(method, path, handler x3)
<
M extends string,
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = IntersectNonAnyTypes<[E, E2, E3]>
>(
method: M,
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I3['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(method, path, handler x4)
<
M extends string,
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
P5 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I & I2 & I3,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4]>
>(
method: M,
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>,
H<E5, MergePath<BasePath, P5>, I4, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I4['in'], MergeTypedResponseData<R>>, BasePath>
// app.get(method, path, handler x5)
<
M extends string,
P extends string,
P2 extends string = P,
P3 extends string = P,
P4 extends string = P,
P5 extends string = P,
P6 extends string = P,
R extends HandlerResponse<any> = any,
I extends Input = {},
I2 extends Input = I,
I3 extends Input = I & I2,
I4 extends Input = I & I2 & I3,
I5 extends Input = I & I2 & I3 & I4,
E2 extends Env = E,
E3 extends Env = E,
E4 extends Env = E,
E5 extends Env = E,
E6 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4, E5]>
>(
method: M,
path: P,
...handlers: [
H<E2, MergePath<BasePath, P2>, I, R>,
H<E3, MergePath<BasePath, P3>, I2, R>,
H<E4, MergePath<BasePath, P4>, I3, R>,
H<E5, MergePath<BasePath, P5>, I4, R>,
H<E6, MergePath<BasePath, P6>, I5, R>
]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I5['in'], MergeTypedResponseData<R>>, BasePath>
<M extends string, P extends string, R extends HandlerResponse<any> = any, I extends Input = {}>(
method: M,
path: P,
...handlers: H<E, MergePath<BasePath, P>, I, R>[]
): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>, BasePath>
// app.on(method[], path, ...handler)
<P extends string, R extends HandlerResponse<any> = any, I extends Input = {}>(
methods: string[],
path: P,
...handlers: H<E, MergePath<BasePath, P>, I, R>[]
): Hono<
E,
S & ToSchema<string, MergePath<BasePath, P>, I['in'], MergeTypedResponseData<R>>,
BasePath
>
}
type ExtractKey<S> = S extends Record<infer Key, unknown>
? Key extends string
? Key
: never
: string
////////////////////////////////////////
////// //////
////// ToSchema //////
////// //////
////////////////////////////////////////
export type ToSchema<M extends string, P extends string, I extends Input['in'], O> = {
[K in P]: {
[K2 in M as AddDollar<K2>]: {
input: unknown extends I ? AddParam<{}, P> : AddParam<I, P>
output: unknown extends O ? {} : O
}
}
}
export type Schema = {
[Path: string]: {
[Method: `$${Lowercase<string>}`]: {
input: Partial<ValidationTargets> & {
param?: Record<string, string>
}
output: {}
}
}
}
export type MergeSchemaPath<OrigSchema, SubPath extends string> = {
[K in keyof OrigSchema as `${MergePath<SubPath, K & string>}`]: OrigSchema[K]
}
export type AddParam<I, P extends string> = ParamKeys<P> extends never
? I
: I & { param: UnionToIntersection<ParamKeyToRecord<ParamKeys<P>>> }
type AddDollar<T extends string> = `$${Lowercase<T>}`
export type MergePath<A extends string, B extends string> = A extends ''
? B
: A extends '/'
? B
: A extends `${infer P}/`
? B extends `/${infer Q}`
? `${P}/${Q}`
: `${P}/${B}`
: B extends `/${infer Q}`
? Q extends ''
? A
: `${A}/${Q}`
: `${A}/${B}`
////////////////////////////////////////
////// //////
////// TypedResponse //////
////// //////
////////////////////////////////////////
export type TypedResponse<T = unknown> = {
response: Response | Promise<Response>
data: T
format: 'json' // Currently, support only `json` with `c.jsonT()`
status: StatusCode
}
type ExtractResponseData<T> = T extends Promise<infer T2>
? T2 extends TypedResponse<infer U>
? U
: {}
: T extends TypedResponse<infer U>
? U
: {}
type MergeTypedResponseData<T> = ExtractResponseData<T>
////////////////////////////////////////
////// /////
////// ValidationTargets /////
////// /////
////////////////////////////////////////
export type ValidationTargets = {
json: any
form: Record<string, string | File>
query: Record<string, string | string[]>
queries: Record<string, string[]> // Deprecated. Will be obsolete in v4.
param: Record<string, string>
header: Record<string, string>
cookie: Record<string, string>
}
////////////////////////////////////////
////// //////
////// Path parameters //////
////// //////
////////////////////////////////////////
type ParamKeyName<NameWithPattern> = NameWithPattern extends `${infer Name}{${infer Rest}`
? Rest extends `${infer _Pattern}?`
? `${Name}?`
: Name
: NameWithPattern
type ParamKey<Component> = Component extends `:${infer NameWithPattern}`
? ParamKeyName<NameWithPattern>
: never
export type ParamKeys<Path> = Path extends `${infer Component}/${infer Rest}`
? ParamKey<Component> | ParamKeys<Rest>
: ParamKey<Path>
export type ParamKeyToRecord<T extends string> = T extends `${infer R}?`
? Record<R, string | undefined>
: { [K in T]: string }
////////////////////////////////////////
////// //////
///// For HonoRequest //////
////// //////
////////////////////////////////////////
export type InputToDataByTarget<
T extends Input['out'],
Target extends keyof ValidationTargets
> = T extends {
[K in Target]: infer R
}
? R
: never
export type RemoveQuestion<T> = T extends `${infer R}?` ? R : T
export type UndefinedIfHavingQuestion<T> = T extends `${infer _}?` ? string | undefined : string
////////////////////////////////////////
////// //////
////// Utilities //////
////// //////
////////////////////////////////////////
export type ExtractSchema<T> = UnionToIntersection<
T extends Hono<infer _, infer S, any> ? S : never
>
////////////////////////////////////////
////// //////
////// FetchEvent //////
////// //////
////////////////////////////////////////
export abstract class FetchEventLike {
abstract readonly request: Request
abstract respondWith(promise: Response | Promise<Response>): void
abstract passThroughOnException(): void
abstract waitUntil(promise: Promise<void>): void
}