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| Original file line number | Diff line number | Diff line change |
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| export default { | ||
| } |
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| export default { | ||
| "APP_INVENTORY_VIEW": "MDM_IMP_INVENTORY_VIEW", | ||
| "IMPORT_APP_VIEW": "IMPORT_APP_VIEW" | ||
| } as any |
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| import { AbilityBuilder, PureAbility } from '@casl/ability'; | ||
| import { getEvaluator, parse } from 'boon-js'; | ||
| import { Tokens } from 'boon-js/lib/types' | ||
|
|
||
| // TODO Improve this | ||
| // We will move this code to an external plugin and use below Actions and Rules accordlingly | ||
| let Actions = {} as any; | ||
| let Rules = {} as any; | ||
|
|
||
| // We are using CASL library to define permissions. | ||
| // Instead of using Action-Subject based authorisation we are going with Claim based Authorization. | ||
| // We would be defining the permissions for each action and case, map with server permissiosn based upon certain rules. | ||
| // https://casl.js.org/v5/en/cookbook/claim-authorization | ||
| // Following the comment of Sergii Stotskyi, author of CASL | ||
| // https://github.com/stalniy/casl/issues/525 | ||
| // We are defining a PureAbility and creating an instance with AbilityBuilder. | ||
| type ClaimBasedAbility = PureAbility<string>; | ||
| const { build } = new AbilityBuilder<ClaimBasedAbility>(PureAbility); | ||
| const ability = build(); | ||
|
|
||
| /** | ||
| * The method returns list of permissions required for the rules. We are having set of rules, | ||
| * through which app permissions are defined based upon the server permissions. | ||
| * When getting server permissions, as all the permissions are not be required. | ||
| * Specific permissions used defining the rules are extracted and sent to server. | ||
| * @returns permissions | ||
| */ | ||
| const getServerPermissionsFromRules = () => { | ||
| // Iterate for each rule | ||
| const permissions = Object.keys(Rules).reduce((permissions: any, rule: any) => { | ||
| const permissionRule = Rules[rule]; | ||
| // some rules may be empty, no permission is required from server | ||
| if (permissionRule) { | ||
| // Each rule may have multiple permissions along with operators | ||
| // Boon js parse rules into tokens, each token may be operator or server permission | ||
| // permissionId will have token name as identifier. | ||
| const permissionTokens = parse(permissionRule); | ||
| permissions = permissionTokens.reduce((permissions: any, permissionToken: any) => { | ||
| // Token object with name as identifier has permissionId | ||
| if (Tokens.IDENTIFIER === permissionToken.name) { | ||
| permissions.add(permissionToken.value); | ||
| } | ||
| return permissions; | ||
| }, permissions) | ||
| } | ||
| return permissions; | ||
| }, new Set()) | ||
| return [...permissions]; | ||
| } | ||
|
|
||
| /** | ||
| * The method is used to prepare app permissions from the server permissions. | ||
| * Rules could be defined such that each app permission could be defined based upon certain one or more server permissions. | ||
| * @param serverPermissions | ||
| * @returns appPermissions | ||
| */ | ||
| const prepareAppPermissions = (serverPermissions: any) => { | ||
| const serverPermissionsInput = serverPermissions.reduce((serverPermissionsInput: any, permission: any) => { | ||
| serverPermissionsInput[permission] = true; | ||
| return serverPermissionsInput; | ||
| }, {}) | ||
| // Boonjs evaluator needs server permissions as object with permissionId and boolean value | ||
| // Each rule is passed to evaluator along with the server permissions | ||
| // if the server permissions and rule matches, app permission is added to list | ||
| const permissions = Object.keys(Rules).reduce((permissions: any, rule: any) => { | ||
| const permissionRule = Rules[rule]; | ||
| // If for any app permission, we have empty rule we user is assigned the permission | ||
| // If rule is not defined, the app permisions is still evaluated or provided to all the users. | ||
| if (!permissionRule || (permissionRule && getEvaluator(permissionRule)(serverPermissionsInput))) { | ||
| permissions.push(rule); | ||
| } | ||
| return permissions; | ||
| }, []) | ||
| const { can, rules } = new AbilityBuilder<ClaimBasedAbility>(PureAbility); | ||
| permissions.map((permission: any) => { | ||
| can(permission); | ||
| }) | ||
| return rules; | ||
| } | ||
|
|
||
| /** | ||
| * | ||
| * Sets the current app permissions. This should be used after perparing the app permissions from the server permissions | ||
| * @param permissions | ||
| * @returns | ||
| */ | ||
| const setPermissions = (permissions: any) => { | ||
| // If the user has passed undefined or null, it should not break the code | ||
| if (!permissions) permissions = []; | ||
| ability.update(permissions) | ||
| return true; | ||
| }; | ||
|
|
||
| /** | ||
| * Resets the permissions list. Used for cases like logout | ||
| */ | ||
| const resetPermissions = () => setPermissions([]); | ||
|
|
||
| /** | ||
| * | ||
| * @param permission | ||
| * @returns | ||
| */ | ||
| const hasPermission = (permission: string) => ability.can(permission); | ||
|
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||
| export { Actions, getServerPermissionsFromRules, hasPermission, prepareAppPermissions, resetPermissions, setPermissions}; | ||
|
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||
| // TODO Move this code to an external plugin, to be used across the apps | ||
| export default { | ||
| install(app: any, options: any) { | ||
|
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||
| // Rules and Actions could be app and OMS package specific | ||
| Rules = options.rules; | ||
| Actions = options.actions; | ||
|
|
||
| // TODO Check why global properties is not working and apply across. | ||
| app.config.globalProperties.$permission = this; | ||
| }, | ||
| getServerPermissionsFromRules, | ||
| hasPermission, | ||
| prepareAppPermissions, | ||
| resetPermissions, | ||
| setPermissions | ||
| } |
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