Add typescript support

[reuzel]

Hi,

Nice and simple utility! I missed the typescript support though. Made a start that works for me, but it still requires support for nested modules. I thought it would be nice to share it with you and the community...

Regards,
Joost

declare module "combine-selectors-redux" {

    type Selector<S, AS extends any[], R> = (state:S, ...args: AS) => R;
    type AnySelector<S> = Selector<S, any[], any>;
    type Module<S> = { [key:string]: AnySelector<S> }
    type ModuleState<M> = M extends Module<infer S> ? S : never
    type CombinedModuleState<CM> = { [K in keyof CM]: ModuleState<CM[K]>};

    type MappedSelector<LS, S, F> = F extends Selector<LS, infer AS, infer R> ? Selector<S, AS, R> : never;
    type MappedModule<M,S> = { [K in keyof M]: MappedSelector<ModuleState<M>, S, M[K]> }
    type CombinedSelectors<CS> = { [K in keyof CS]: MappedModule<CS[K], CombinedModuleState<CS>>}

    export function combineSelectors<T>(module: T): CombinedSelectors<T>
}

[tapayne88]

Hi @reuzel! Glad you're finding it useful. I'm slowly picking up typescript so I'll try to finish off the definitions! It should be a nice challenge.