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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | 1x 1x 1x 4x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import { Union } from './types';
export class AccessControl<T, R, P> {
#roles: Union<T, R, P>;
constructor(roles: Union<T, R, P>) {
this.#roles = roles;
}
can(role: keyof T, action: keyof P, resource: keyof R) {
const selectedRole = this.#roles[role as string];
const hasResource = !!selectedRole && !!selectedRole[resource];
const hasAction = hasResource && !!selectedRole[resource][action];
const isActionActive =
hasAction && !!selectedRole[resource][action].enabled;
return !!selectedRole && hasResource && hasAction && isActionActive;
}
filter(role: keyof T, action: keyof P, resource: keyof R) {
const can = this.can(role, action, resource);
const attributes =
(this.#roles[role as string][resource][action].attributes as string[]) ||
[];
return async <T>(res: T | Promise<T>): Promise<T> => {
Iif (!can) {
return res;
}
let data = (await res) as T | T[];
const attrArray = Object.keys(attributes).filter((a) => !attributes[a]);
Iif (Array.isArray(data)) {
data = data.map((a) => {
for (const attr of attrArray) {
if (Array.isArray(a[attr])) {
a[attr] = [];
} else {
delete a[attr];
}
}
return a;
});
} else {
for (const attr of attrArray) {
delete data[attr];
}
}
return data as T;
};
}
}
export * from './types';
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