Add permission and role management features

src/permission/services/index.ts

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+export * from './permission.service';

src/permission/services/permission.service.ts

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+import { PermissionMapping } from '@app/common/constants/permissions-mapping';
+import { RolePermissions } from '@app/common/constants/role-permissions';
+import { RoleType } from '@app/common/constants/role.type.enum';
+import { RoleTypeRepository } from '@app/common/modules/role-type/repositories';
+import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
+
+@Injectable()
+export class PermissionService {
+  constructor(private readonly roleTypeRepository: RoleTypeRepository) {}
+
+  async getPermissionsByRole(roleUuid: string) {
+    try {
+      const role = await this.roleTypeRepository.findOne({
+        where: {
+          uuid: roleUuid,
+        },
+      });
+
+      if (!role) {
+        throw new HttpException('Role not found', HttpStatus.NOT_FOUND);
+      }
+
+      const permissions = this.mapPermissions(role.type.toString() as RoleType);
+      return permissions;
+    } catch (err) {
+      throw new HttpException(
+        err.message || 'Internal Server Error',
+        err.status || HttpStatus.INTERNAL_SERVER_ERROR,
+      );
+    }
+  }
+  mapPermissions(role: RoleType): any[] {
+    const rolePermissions = RolePermissions[role]; // Permissions for the role
+
+    const mappedPermissions = Object.entries(PermissionMapping).map(
+      ([title, subOptions]) => ({
+        title,
+        subOptions: Object.entries(subOptions).map(
+          ([subTitle, permissions]) => ({
+            title: subTitle,
+            subOptions: permissions.map((permission) => ({
+              title: permission,
+              isChecked: rolePermissions.includes(`${subTitle}_${permission}`), // Check if the role has the permission
+            })),
+          }),
+        ),
+      }),
+    );
+
+    return mappedPermissions;
+  }
+}