docs: write godocs in dynamomq errors

error.go

@@ -2,76 +2,96 @@ package dynamomq
 
 import "fmt"
 
+// IDNotProvidedError represents an error when an ID is not provided where it is required.
 type IDNotProvidedError struct{}
 
+// Error returns a standard error message for IDNotProvidedError.
 func (e IDNotProvidedError) Error() string {
 	return "ID was not provided."
 }
 
+// IDNotFoundError represents an error when a provided ID is not found in DynamoDB.
 type IDNotFoundError struct{}
 
+// Error returns a standard error message for IDNotFoundError.
 func (e IDNotFoundError) Error() string {
 	return "Provided ID was not found in the Dynamo DB."
 }
 
+// IDDuplicatedError represents an error when a provided ID is duplicated in the system.
 type IDDuplicatedError struct{}
 
+// Error returns a standard error message for IDDuplicatedError.
 func (e IDDuplicatedError) Error() string {
 	return "Provided ID was duplicated."
 }
 
+// ConditionalCheckFailedError represents an error when a condition check on the 'version' attribute fails.
 type ConditionalCheckFailedError struct {
 	Cause error
 }
 
+// Error returns a detailed error message including the underlying cause for ConditionalCheckFailedError.
 func (e ConditionalCheckFailedError) Error() string {
 	return fmt.Sprintf("Condition on the 'version' attribute has failed: %v.", e.Cause)
 }
 
+// BuildingExpressionError represents an error during the building of a DynamoDB expression.
 type BuildingExpressionError struct {
 	Cause error
 }
 
+// Error returns a detailed error message including the underlying cause for BuildingExpressionError.
 func (e BuildingExpressionError) Error() string {
 	return fmt.Sprintf("Failed to build expression: %v.", e.Cause)
 }
 
+// DynamoDBAPIError represents a generic error encountered when making a DynamoDB API call.
 type DynamoDBAPIError struct {
 	Cause error
 }
 
+// Error returns a detailed error message including the underlying cause for DynamoDBAPIError.
 func (e DynamoDBAPIError) Error() string {
 	return fmt.Sprintf("Failed DynamoDB API: %v.", e.Cause)
 }
 
+// UnmarshalingAttributeError represents an error during the unmarshaling of DynamoDB attributes.
 type UnmarshalingAttributeError struct {
 	Cause error
 }
 
+// Error returns a detailed error message including the underlying cause for UnmarshalingAttributeError.
 func (e UnmarshalingAttributeError) Error() string {
 	return fmt.Sprintf("Failed to unmarshal: %v.", e.Cause)
 }
 
+// MarshalingAttributeError represents an error during the marshaling of DynamoDB attributes.
 type MarshalingAttributeError struct {
 	Cause error
 }
 
+// Error returns a detailed error message including the underlying cause for MarshalingAttributeError.
 func (e MarshalingAttributeError) Error() string {
 	return fmt.Sprintf("Failed to marshal: %v.", e.Cause)
 }
 
+// EmptyQueueError represents an error when an operation cannot proceed due to an empty queue.
 type EmptyQueueError struct{}
 
+// Error returns a standard error message for EmptyQueueError.
 func (e EmptyQueueError) Error() string {
 	return "Cannot proceed, queue is empty."
 }
 
+// InvalidStateTransitionError represents an error for invalid state transitions during operations.
 type InvalidStateTransitionError struct {
 	Msg       string
 	Operation string
 	Current   Status
 }
 
+// Error returns a detailed error message explaining the invalid state transition.
 func (e InvalidStateTransitionError) Error() string {
 	return fmt.Sprintf("operation %s failed for status %s: %s.", e.Operation, e.Current, e.Msg)
 }