--- title: TaskValidator<TTask> summary: API reference for TaskValidator. status: draft owner: SAIF Doc Gen last_reviewed: 2026-09-24 library: SAIF.Services reference_type: package --- # TaskValidator<TTask> A generic FluentValidation `AbstractValidator` (constrained to `TaskBase`) enforcing that any task's due date is set and falls on a valid working day, and that its text is present and no longer than 4000 characters. It depends on `IWorkCalendarService` to determine whether a candidate task date is a working day. ## Purpose - Rejects tasks with an unset (`DateTime.MinValue`) due date. - Rejects tasks whose due date is not a valid working day, per `IWorkCalendarService.IsWorkingDay`. - Rejects tasks with null/empty text or text exceeding 4000 characters. ## Context - Namespace: `SAIF.Services.Tasks` - Assembly/package: `SAIF.Services` (packaged inside the `SAIF.SAIFCode.Core` NuGet package) ## Public members | Member | Signature | Purpose | | --- | --- | --- | | TaskValidator(...) | `public TaskValidator(IWorkCalendarService workCalendarService)` | Registers FluentValidation rules for `TaskDate` (required, must be a working day) and `TaskText` (required, max 4000 characters) against the injected work-calendar service. | ## Behavioral notes - Both validation rules produce fixed, human-readable error messages ("Error: Due date is required.", "Error: Due date must be a valid work day.", "Error: Text is required.", "Error: Text cannot be more than 4000 characters.") rather than localizable resource strings. - The 4000-character text limit matches the truncation limit used elsewhere (e.g. `PolicyDocumentsBatchService.MaxTaskTextLength`), suggesting a shared platform constraint on task text length*. > **Note:** Statements marked with * were inferred from code structure, naming conventions, or > contextual evidence where direct confirmation was not available in source artifacts. Statements > marked with ** could not be confirmed; treat as unknown until verified. ## Sources - Services/SAIF.Services/Tasks/TaskValidator.cs