src/syntax/binding_when_syntax.ts
import { interfaces } from '../interfaces/interfaces';
import { BindingOnSyntax } from './binding_on_syntax';
import { namedConstraint, taggedConstraint, traverseAncerstors, typeConstraint } from './constraint_helpers';
class BindingWhenSyntax<T> implements interfaces.BindingWhenSyntax<T> {
private _binding: interfaces.Binding<T>;
public constructor(binding: interfaces.Binding<T>) {
this._binding = binding;
}
public when(constraint: (request: interfaces.Request) => boolean): interfaces.BindingOnSyntax<T> {
this._binding.constraint = constraint as interfaces.ConstraintFunction;
return new BindingOnSyntax<T>(this._binding);
}
public whenTargetNamed(name: string | number | symbol): interfaces.BindingOnSyntax<T> {
this._binding.constraint = namedConstraint(name);
return new BindingOnSyntax<T>(this._binding);
}
public whenTargetIsDefault(): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) => {
if (request === null) {
return false;
}
const targetIsDefault = (request.target !== null) &&
(!request.target.isNamed()) &&
(!request.target.isTagged());
return targetIsDefault;
};
return new BindingOnSyntax<T>(this._binding);
}
public whenTargetTagged(tag: string | number | symbol, value: unknown): interfaces.BindingOnSyntax<T> {
this._binding.constraint = taggedConstraint(tag)(value);
return new BindingOnSyntax<T>(this._binding);
}
public whenInjectedInto(parent: (NewableFunction | string)): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && typeConstraint(parent)(request.parentRequest);
return new BindingOnSyntax<T>(this._binding);
}
public whenParentNamed(name: string | number | symbol): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && namedConstraint(name)(request.parentRequest);
return new BindingOnSyntax<T>(this._binding);
}
public whenParentTagged(tag: string | number | symbol, value: unknown): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && taggedConstraint(tag)(value)(request.parentRequest);
return new BindingOnSyntax<T>(this._binding);
}
public whenAnyAncestorIs(ancestor: (NewableFunction | string)): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && traverseAncerstors(request, typeConstraint(ancestor));
return new BindingOnSyntax<T>(this._binding);
}
public whenNoAncestorIs(ancestor: (NewableFunction | string)): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && !traverseAncerstors(request, typeConstraint(ancestor));
return new BindingOnSyntax<T>(this._binding);
}
public whenAnyAncestorNamed(name: string | number | symbol): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && traverseAncerstors(request, namedConstraint(name));
return new BindingOnSyntax<T>(this._binding);
}
public whenNoAncestorNamed(name: string | number | symbol): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && !traverseAncerstors(request, namedConstraint(name));
return new BindingOnSyntax<T>(this._binding);
}
public whenAnyAncestorTagged(tag: string | number | symbol, value: unknown): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && traverseAncerstors(request, taggedConstraint(tag)(value));
return new BindingOnSyntax<T>(this._binding);
}
public whenNoAncestorTagged(tag: string | number | symbol, value: unknown): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && !traverseAncerstors(request, taggedConstraint(tag)(value));
return new BindingOnSyntax<T>(this._binding);
}
public whenAnyAncestorMatches(constraint: (request: interfaces.Request) => boolean): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && traverseAncerstors(request, constraint as interfaces.ConstraintFunction);
return new BindingOnSyntax<T>(this._binding);
}
public whenNoAncestorMatches(constraint: (request: interfaces.Request) => boolean): interfaces.BindingOnSyntax<T> {
this._binding.constraint = (request: interfaces.Request | null) =>
request !== null && !traverseAncerstors(request, constraint as interfaces.ConstraintFunction);
return new BindingOnSyntax<T>(this._binding);
}
}
export { BindingWhenSyntax };