permission.entity.ts

export interface PermissionCondition {}
@Entity("permissions")
export class Permission extends BaseEntity {
  // define class attributes...
  
  /**
   * @param condition: {"departmentId": "${id}"}
   * @param variables: {"id: 1"}
   * @return condition after parse: {"departmentId": 1}
   */
   public static parseCondition(condition: PermissionCondition, variables: Record<string, any>): PermissionCondition {
    if (!condition) return null;
    const parsedCondition = {};
    for (const [key, rawValue] of Object.entries(condition)) {
      if (rawValue !== null && typeof rawValue === "object") {
        const value = this.parseCondition(rawValue, variables);
        parsedCondition[key] = value;
        continue;
      }
      if (typeof rawValue !== "string") {
        parsedCondition[key] = rawValue;
        continue;
      }
      // find placeholder "${}""
      const matches = /^\\${([a-zA-Z0-9]+)}$/.exec(rawValue);
      if (!matches) {
        parsedCondition[key] = rawValue;
        continue;
      }
      const value = variables[matches[1]];
      if (typeof value === "undefined") {
        throw new ReferenceError(`Variable ${name} is not defined`);
      }
      parsedCondition[key] = value;
    }
    return parsedCondition;
  }
}