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namespace EC.Helper.RabbitFunc.Runtime;
public class RuntimeContext
{
private readonly Dictionary<string, RuntimeVariable> variables = new Dictionary<string, RuntimeVariable>();
private readonly RuntimeContext parent;
public RuntimeContext()
{ }
internal RuntimeContext(RuntimeContext parent)
{
if (parent == null)
throw new ArgumentNullException(nameof(parent));
this.parent = parent;
this.Domain = parent.Domain;
}
public object this[string name]
{
set
{
if (name == null)
throw new ArgumentNullException(nameof(name));
variables[name] = new RuntimeVariable(value);
}
}
internal RabbitDomain Domain { get; set; }
private RuntimeContext FindCurrentOrParent(string name)
{
return variables.ContainsKey(name) ? this : parent?.FindCurrentOrParent(name);
}
public void Variable(string name, object value)
{
if (name == null)
throw new ArgumentNullException(nameof(name));
variables[name] = new RuntimeVariable(value);
}
public RuntimeVariable Assign(string name, object value)
{
if (name == null)
throw new ArgumentNullException(nameof(name));
var context = FindCurrentOrParent(name);
if (context == null) return null;
if (!context.variables.TryGetValue(name, out RuntimeVariable rv)) return null;
rv.SetValue(value);
return rv;
}
public RuntimeVariable Access(string name)
{
if (name == null)
throw new ArgumentNullException(nameof(name));
var context = FindCurrentOrParent(name);
if (context == null) return null;
if (!context.variables.TryGetValue(name, out RuntimeVariable rv)) return null;
return rv;
}
public class RuntimeVariable
{
public RuntimeVariable()
{ }
public RuntimeVariable(object value)
{
Value = value;
IsAssigned = true;
}
public object Value { get; set; }
public bool IsAssigned { get; set; }
public void SetValue(object value)
{
Value = value;
IsAssigned = true;
}
}
}