BadImportExpression.cs

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using BadScript2.Common;
using BadScript2.Runtime;
using BadScript2.Runtime.Error;
using BadScript2.Runtime.Module;
using BadScript2.Runtime.Objects;
 
namespace BadScript2.Parser.Expressions.Module;
 
public class BadImportExpression : BadExpression
{
    public readonly string Name;
 
    public readonly string Path;
 
    public BadImportExpression(string name, string path, BadSourcePosition position) : base(false, position)
    {
        Name = name;
        Path = path;
    }
 
    public override IEnumerable<BadExpression> GetDescendants()
    {
        yield break;
    }
 
    public static IEnumerable<BadObject> Import(BadExecutionContext ctx, string name, string path, BadSourcePosition? position)
    {
        BadModuleImporter? importer = ctx.Scope.GetSingleton<BadModuleImporter>();
 
        if (importer == null)
        {
            throw BadRuntimeException.Create(ctx.Scope, "Module Importer not found");
        }
 
        IEnumerable<BadObject> result = importer.Get(path);
        BadObject r = BadObject.Null;
 
        foreach (BadObject o in result)
        {
            r = o;
 
            yield return o;
        }
 
        r = r.Dereference(position);
 
        yield return r;
 
        if (ctx.Scope.HasLocal(name, ctx.Scope, false))
        {
            throw BadRuntimeException.Create(ctx.Scope, $"Variable '{name}' already defined in current scope.");
        }
 
        ctx.Scope.DefineVariable(name, r, ctx.Scope, new BadPropertyInfo(r.GetPrototype(), true));
    }
 
    protected override IEnumerable<BadObject> InnerExecute(BadExecutionContext context)
    {
        return Import(context, Name, Path, Position);
    }
}