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import { Injectable } from '@nestjs/common'; |
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import { IRoleRbac } from './interfaces/role.rbac.interface'; |
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import { IFilterPermission } from '../permissions/interfaces/filter.permission.interface'; |
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import { IParamsFilter } from '../params-filter/interfaces/params.filter.interface'; |
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@Injectable() |
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export class RoleRbac implements IRoleRbac { |
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constructor( |
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private readonly role: string, |
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private readonly grant: string[], |
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private readonly filters: object, |
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private readonly paramsFilter?: IParamsFilter, |
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) { |
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} |
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async canAsync(...permissions: string[]): Promise<boolean> { |
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return this.checkPermissions<Promise<boolean>>(permissions, 'canAsync'); |
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} |
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can(...permissions: string[]): boolean { |
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return this.checkPermissions<boolean>(permissions, 'can'); |
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} |
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private checkPermissions<T>(permissions, methodName): T { |
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if (!permissions.length) { |
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return (<any>false); |
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} |
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// check grant |
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for (const permission of permissions) { |
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if (!this.grant.includes(permission)) { |
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return (<any>false); |
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} |
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} |
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// check custom filter |
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for (const permission of permissions) { |
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// check particular permission [permission@action] |
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if ( |
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this.grant.includes(permission) |
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&& permission.includes('@') |
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) { |
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const filter: string = permission.split('@')[1]; |
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const filterService: IFilterPermission = this.filters[filter]; |
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if (filterService) { |
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return filterService?.[methodName]?.( |
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this.paramsFilter ? this.paramsFilter.getParam(filter) : null, |
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) ?? true |
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} |
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} |
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// check particular permission [permission] |
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if (this.grant.includes(permission) |
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&& !permission.includes('@')) { |
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for (const filter in this.filters) { |
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if ( |
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this.filters.hasOwnProperty(filter) && |
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this.grant.includes(`${permission}@${filter}`) |
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) { |
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return this.filters[filter]?.[methodName]?.( |
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this.paramsFilter ? this.paramsFilter.getParam(filter) : null, |
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) ?? true |
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} |
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} |
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} |
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} |
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return (<any>true); |
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} |
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} |
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