TaskValidator<TTask>

A generic FluentValidation AbstractValidator<TTask> (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