/// <summary>
/// Clones the <see cref="EvaluationContext"/> and returns a new one that contains the new variable
/// </summary>
private EvaluationContext GetScopeLocalContext(EvaluationContext ctx)
{
TemplateVariable variable;
if (Value == null)
{
variable = new TemplateVariable(
value: null,
selectResolver: () => Value.ComputeSelect(ctx),
pathsResolver: () => Value.ComputePaths(ctx));
}
else
{
variable = new TemplateVariable(
evalAsync: () => Value.Evaluate(ctx),
selectResolver: () => Value.ComputeSelect(ctx),
pathsResolver: () => Value.ComputePaths(ctx));
}
var clone = ctx.Clone();
clone.SetLocalVariable(VariableName, variable);
return(clone);
}
/// <summary>
/// Adds a local <see cref="TemplateVariable"/> to the context under the supplied name,
/// overriding any existing <see cref="TemplateVariable"/> with the same name
/// </summary>
public void SetLocalVariable(string name, TemplateVariable variable)
{
if (_localVariables == null)
{
_localVariables = new VariablesDictionary();
}
_localVariables[name] = variable;
}
/// <summary> /// Retrieves the <see cref="TemplateVariable"/> from the context. Searches through the local variables first then falls back to the global /// </summary> /// <param name="variableName">The name to search for</param> /// <param name="variableEntry">The output result</param> /// <returns>True if the <see cref="TemplateVariable"/> was found, false otherwise</returns> public bool TryGetVariable(string variableName, out TemplateVariable variableEntry) => (_localVariables != null && _localVariables.TryGetValue(variableName, out variableEntry)) || _globalVariables.TryGetValue(variableName, out variableEntry);
