@bemedev/permissions
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A library for managing permissions
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{"version":3,"file":"machine.cjs","sources":["../src/machine.ts"],"sourcesContent":["import { common } from '@bemedev/core';\nimport type {\n DeepPartial,\n TrueObject,\n ValuesOf,\n} from '@bemedev/core/lib/globals/types';\nimport type { KeysMatching } from '@bemedev/decompose';\nimport { DELIMITER } from './constants';\nimport type {\n CollectedReturns,\n HasDataPermissions_F,\n HasPermissions_F,\n HasUserPermissions_F,\n ReduceCollectedReturns_F,\n ResPerm,\n ResPerm2,\n} from './machine.types';\nimport type { Config, Implementation as Impl, UserFrom } from './types';\n\nclass Machine<\n const Co extends Config,\n Implementation extends Impl<Co> = Impl<Co>,\n> {\n #ressources: Co['ressources'];\n\n #implementation!: Implementation;\n\n #roles: Co['roles'];\n\n constructor(private __config: Co) {\n this.#ressources = Object.freeze(this.__config.ressources);\n this.#roles = Object.freeze(this.__config.roles);\n }\n\n get config() {\n return Object.freeze(this.__config);\n }\n\n get roles() {\n return Object.freeze(this.#roles);\n }\n\n get implementation() {\n return Object.freeze(this.#implementation);\n }\n\n get __user() {\n return common.typings.dynamic<UserFrom<Co> & Co['user']>();\n }\n\n get ressources() {\n return this.#ressources;\n }\n\n getPriority(role: keyof Co['roles']) {\n return this.#roles[role];\n }\n\n #sortRoles = (...roles: (keyof Co['roles'])[]) => {\n return roles.sort((a, b) => {\n return this.getPriority(a) - this.getPriority(b);\n });\n };\n\n #reverseRoles = (...roles: (keyof Co['roles'])[]) => {\n return roles.sort((a, b) => {\n return this.getPriority(b) - this.getPriority(a);\n });\n };\n\n sortRoles = (order: 'asc' | 'desc', ...roles: (keyof Co['roles'])[]) => {\n if (order === 'asc') return this.#sortRoles(...roles);\n return this.#reverseRoles(...roles);\n };\n\n #implements = (implementation: Implementation) => {\n return (this.#implementation = implementation);\n };\n\n /**\n * @deprecated\n *\n * Implements the machine with the provided implementation.\n * This method is used to set the implementation for the machine, allowing it to handle permissions\n * based on the provided implementation logic.\n * @param implementation The implementation logic to be set for the machine.\n * @returns A new instance of the machine with the provided implementation.\n */\n __implements = (implementation: Implementation) => {\n const _new = new Machine<Co, Implementation>(this.__config);\n\n _new.#implements(implementation);\n\n return _new;\n };\n\n #hasUserPermissions: HasUserPermissions_F<Co> = ({\n performer,\n owner,\n data,\n action,\n ressource,\n }) => {\n const sortedRoles = this.#reverseRoles(...performer.roles);\n\n const collecteds: CollectedReturns<any>[] = [];\n\n sortedRoles.forEach(role => {\n const key =\n `${String(role) as keyof Co & string}${DELIMITER}${ressource}${DELIMITER}${action}` as keyof Implementation;\n\n const permission = this.#implementation[key];\n\n if (common.castings.is.undefined(permission)) return;\n\n if (typeof permission === 'function') {\n const result = permission({\n owner,\n performer,\n data,\n });\n\n return collecteds.push(result);\n }\n\n return collecteds.push(permission);\n });\n\n if (collecteds.length === 0) return false;\n\n return Machine.reduceCollection('or', ...collecteds);\n };\n\n #hasDataPermissions: HasDataPermissions_F<Co> = (\n performer,\n action,\n extra,\n ) => {\n const permissions = this.#extractDataPermissions(extra);\n\n const sortedRoles = this.#reverseRoles(...performer.roles);\n\n if (permissions === true) return true;\n\n const result1 = permissions[`user:${performer.__id}`]?.[action];\n\n const alreadyTrue = result1 === true;\n if (alreadyTrue) return true;\n\n const collecteds: CollectedReturns<any>[] = [];\n\n if (common.castings.is.defined(result1)) collecteds.push(result1);\n\n sortedRoles.forEach(role => {\n const _role = String(role) as keyof Co & string;\n const value1 = permissions[`role:${_role}`]?.[action];\n if (value1) collecteds.push(value1);\n });\n\n if (collecteds.length === 0) return true;\n\n return Machine.reduceCollection('or', ...collecteds);\n };\n\n hasPermisions: HasPermissions_F<Co> = args => {\n const userPermissions = this.#hasUserPermissions(args);\n const dataPermissions = this.#hasDataPermissions(\n args.performer,\n args.action,\n args.data?.__extraPermissions,\n );\n\n const strategy =\n this.#ressources[args.ressource].__strategy || 'bypass';\n\n return Machine.reduceCollection<any>(\n strategy,\n userPermissions,\n dataPermissions,\n );\n };\n\n #extractDataPermissions = <\n Re extends Extract<keyof Co['ressources'], string>,\n PD extends TrueObject = DeepPartial<Co['ressources'][Re]['dataType']>,\n Keys extends string = KeysMatching<PD>,\n >(\n permissions?: ResPerm<Co, Re, Keys>,\n ): ResPerm2<Co, Re, Keys[]> => {\n if (!permissions) return true;\n\n type Pe = ResPerm<Co, Re, Keys>;\n\n type Entries = [keyof Pe, ValuesOf<Pe>][];\n\n const entries = common.castings.unknown<Entries>(\n Object.entries(permissions),\n );\n\n const allValuesAreNotDefineds = entries.every(([, value]) =>\n common.castings.is.undefined(value),\n );\n if (allValuesAreNotDefineds) return true;\n\n const out: any = {};\n\n entries.forEach(([action, _permissions]) => {\n if (common.castings.is.undefined(_permissions)) return;\n\n const { allow, disallow } = _permissions;\n\n if (allow) {\n const allowEntries: [string, string[]][] = Object.entries(allow);\n\n allowEntries.forEach(([dataKey, userIds]) => {\n userIds.forEach(userId => {\n if (!out[userId]) {\n out[userId] = {};\n }\n\n if (!out[userId][action]) {\n out[userId][action] = [];\n }\n\n const currentValue = out[userId][action];\n\n if (dataKey === '**') {\n out[userId][action] = true;\n } else if (Array.isArray(currentValue)) {\n if (!currentValue.includes(dataKey)) {\n currentValue.push(dataKey);\n }\n }\n });\n });\n }\n\n if (disallow) {\n const disallowEntries: [string, string[]][] =\n Object.entries(disallow);\n\n disallowEntries.forEach(([dataKey, userIds]) => {\n if (userIds.length === 0) return;\n\n userIds.forEach(userId => {\n if (!out[userId]) {\n out[userId] = {};\n }\n\n if (!out[userId][action]) {\n out[userId][action] = [];\n }\n\n const currentValue = out[userId][action];\n\n if (dataKey === '**') {\n out[userId][action] = false;\n } else if (Array.isArray(currentValue)) {\n // Remove from allowed if it was there (disallow takes precedence)\n const index = currentValue.indexOf(dataKey);\n if (index > -1) {\n currentValue.splice(index, 1);\n }\n }\n });\n });\n }\n });\n\n return out;\n };\n\n static reduceCollection: ReduceCollectedReturns_F = (\n strategy,\n ...collecteds\n ) => {\n if (!strategy || strategy === 'bypass') return collecteds[0];\n\n const isOr = strategy === 'or';\n let out: any;\n\n for (const result of collecteds) {\n if (Array.isArray(out)) {\n if (Array.isArray(result)) {\n if (isOr) out = [...new Set([...out, ...result])];\n else {\n out = out.filter(value => result.includes(value));\n }\n }\n if (!isOr && result === false) return false;\n continue;\n }\n\n if (result === isOr) return isOr;\n\n out = result;\n }\n\n return out;\n };\n}\n\nexport const createMachine = <const Co extends Config>(\n config: Co,\n implementation: Impl<Co>,\n) => {\n const machine = new Machine(config).__implements(implementation);\n\n return machine;\n};\n\nexport { type Machine 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