🎉 ifl command

src/command/ifl.js

@@ -0,0 +1,91 @@
+Juicescript.command_define({
+	name: "ifl",
+	alias: ["if"],
+	
+	validate: function(runner){
+		// COUNT //
+		runner.argument_validate_count({min: 1, max: 3});
+		if(runner.has_error) return;
+		
+		
+		// TYPES //
+		// single value
+		if(runner.command.argument.length === 1){
+			runner.argument_validate_type(1, Juicescript.argument_type.VALUE);
+			return;
+		}
+		
+		// single value negated
+		if(runner.command.argument.length === 2){
+			runner.argument_validate_type(1, Juicescript.argument_type.OPERATOR);
+			runner.argument_validate_type(2, Juicescript.argument_type.VALUE);
+			return;
+		}
+		
+		// two values compared
+		runner.argument_validate_type(1, Juicescript.argument_type.VALUE);
+		runner.argument_validate_type(2, Juicescript.argument_type.OPERATOR);
+		runner.argument_validate_type(3, Juicescript.argument_type.VALUE);
+	},
+	
+	execute: function(runner){
+		// EVALUATE CONDITION //
+		let is_true = this.evaluate(runner);
+		
+		
+		// MAYBE JUMP OVER NEXT COMMAND //
+		if(!is_true){
+			// increase command counter by one
+			runner.counter++;
+		}
+	},
+	
+	evaluate: function(runner){
+		// SINGLE VALUE //
+		if(runner.command.argument.length === 1){
+			// get value
+			let value = runner.argument_value(1);
+			
+			// compare to true
+			return (value === true);
+		}
+		
+		
+		// SINGLE VALUE NEGATED //
+		if(runner.command.argument.length === 2){
+			// make sure first argument is an exclamation mark
+			if(runner.command.argument[0].operator !== Juicescript.token_type.NOT){
+				// ignore with error
+				runner.error("expected NOT, but got " + Juicescript.token_type.name(runner.command.argument[0].operator));
+				return false;
+			}
+			
+			// get value
+			let value = runner.argument_value(2);
+			
+			// compare to true and negate
+			return !(value === true);
+		}
+		
+		
+		// TWO VALUES COMPARED //
+		// get operator
+		let operator = runner.command.argument[1].operator;
+		
+		// get two values
+		let a = runner.argument_value(1);
+		let b = runner.argument_value(3);
+		
+		// do compare
+		if(operator === Juicescript.token_type.EQUAL_EQUAL) return (a === b);
+		if(operator === Juicescript.token_type.NOT_EQUAL) return (a !== b);
+		if(operator === Juicescript.token_type.GREATER) return (a > b);
+		if(operator === Juicescript.token_type.GREATER_EQUAL) return (a >= b);
+		if(operator === Juicescript.token_type.LESS) return (a < b);
+		if(operator === Juicescript.token_type.LESS_EQUAL) return (a <= b);
+		
+		// if we reach this, the operator is invalid
+		runner.error("expected COMPARE OPERATOR, but got " + Juicescript.token_type.name(operator));
+		return false;
+	}
+});