OSID - osid.checklist.mason.TodoProducerChecklistAssignmentSession Service Interface Definition

Interface	osid.checklist.mason.TodoProducerChecklistAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `TodoProducer` to `Checklist` mappings. A `TodoProducer` may appear in multiple `Checklist` objects and removing the last reference to a `TodoProducer` is the equivalent of deleting it. Each `Checklist` may have its own authorizations governing who is allowed to operate on it. Adding a reference of a `TodoProducer` to another `Checklist` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignTodoProducers
Description	Tests if this user can alter todo producer/checklist mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer lookup operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignTodoProducersToChecklist
Description	Tests if this user can alter todo producer/checklist mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer lookup operations to unauthorized users.
Parameters	`osid.id.Id`	`checklistId`	the `Id` of the `Checklist`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`checklistId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableChecklistIds
Description	Gets a list of checklists including and under the given checklist node in which any todo producer can be assigned.
Parameters	`osid.id.Id`	`checklistId`	the `Id` of the `Checklist`
Return	`osid.id.IdList`		list of assignable checklist `Ids`
Errors	NULL_ARGUMENT		`checklistId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableChecklistIdsForTodoProducer
Description	Gets a list of checklists including and under the given checklist node in which a specific todo producer can be assigned.
Parameters	`osid.id.Id`	`checklistId`	the `Id` of the `Checklist`
Parameters	`osid.id.Id`	`todoProducerId`	the `Id` of the `TodoProducer`
Return	`osid.id.IdList`		list of assignable checklist `Ids`
Errors	NULL_ARGUMENT		`checklistId` or `todoProducerId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignTodoProducerToChecklist
Description	Adds an existing `TodoProducer` to an `Checklist.`
Parameters	`osid.id.Id`	`todoProducerId`	the `Id` of the `TodoProducer`
Parameters	`osid.id.Id`	`checklistId`	the `Id` of the `Checklist`
Errors	ALREADY_EXISTS		`todoProducerId` is already assigned to `checklistId`
	NOT_FOUND		`todoProducerId` or `checklistId` not found
	NULL_ARGUMENT		`todoProducerId` or `checklistId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignTodoProducerFromChecklist
Description	Removes a `TodoProducer` from an `Checklist.`
Parameters	`osid.id.Id`	`todoProducerId`	the `Id` of the `TodoProducer`
Parameters	`osid.id.Id`	`checklistId`	the `Id` of the `Checklist`
Errors	NOT_FOUND		`todoProducerId` or `checklistId` not found or `todoProducerId` is not assigned to `checklistId`
	NULL_ARGUMENT		`todoProducerId` or `checklistId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	reassignTodoProducerToChecklist
Description	Moves a `TodoProducer` from one `Checklist` to another. Mappings to other `Checklists` are unaffected.
Parameters	`osid.id.Id`	`todoProducerId`	the `Id` of the `TodoProducer`
	`osid.id.Id`	`fromChecklistId`	the `Id` of the current `Checklist`
	`osid.id.Id`	`toChecklistId`	the `Id` of the destination `Checklist`
Errors	NOT_FOUND		`todoProducerId, fromChecklistId,` or `toChecklistId` not found or `todoProducerId,` not mapped to `fromChecklistId`
	NULL_ARGUMENT		`todoProducerId,, fromChecklistId,` or `toChecklistId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.