public PatchRequest CreatePatchRequest <TDocument>(PropertyUpdateDescriptor[] propertyUpdates, Expression <Func <TDocument, bool> > condition)
{
var parameters = new ScriptParameterDictionary();
var patchRequest = new PatchRequest
{
Values = parameters,
Script = _patchScriptBuilder.CreateConditionalPatchScript(propertyUpdates, condition, parameters)
};
return(patchRequest);
}
public string CreateScriptBody(PropertyUpdateDescriptor[] propertyUpdates, ScriptParameterDictionary parameters)
{
var assignmentScripts = new List <string>(propertyUpdates.Length);
foreach (var propertyUpdate in propertyUpdates)
{
var transformedMemberSelector = GetNormalizedExpression(propertyUpdate.MemberSelector);
var assignmentExpression = Expression.Assign(
transformedMemberSelector,
Expression.Constant(propertyUpdate.NewValue));
assignmentScripts.Add(_expressionProcessorPipeline.ProcessExpression(assignmentExpression, parameters));
}
return(string.Join(
"\n",
assignmentScripts.Select(script => $"\t{script};")));
}
public string CreateScriptCondition <TDocument>(Expression <Func <TDocument, bool> > condition, ScriptParameterDictionary parameters)
{
if (condition == null)
{
throw new ArgumentNullException(nameof(condition));
}
if (parameters == null)
{
throw new ArgumentNullException(nameof(parameters));
}
var normalizedConditionBody = GetNormalizedConditionBody(condition);
return(_expressionProcessorPipeline.ProcessExpression(normalizedConditionBody, parameters));
}
public string CreateConditionalPatchScript <TDocument>(PropertyUpdateDescriptor[] propertyUpdates, Expression <Func <TDocument, bool> > condition, ScriptParameterDictionary parameters)
{
var scriptCondition = _patchScriptConditionBuilder.CreateScriptCondition(condition, parameters);
var scriptBody = _patchScriptBodyBuilder.CreateScriptBody(propertyUpdates, parameters);
return(string.Join(
"\n",
$"if ({scriptCondition}) {{",
scriptBody,
"}"));
}
