MetacityTemplate/Packages/com.unity.metacity-sdk/Runtime/UnityConsole/Console/Scripts/ConsoleController.cs

using System;
using UnityEngine;
using System.Linq;

namespace UnityConsole
{
    /// <summary>
    /// The behavior of the console.
    /// </summary>
    [DisallowMultipleComponent]
    [RequireComponent(typeof(ConsoleController))]
    public class ConsoleController : MonoBehaviour 
    {
        public static ConsoleController Instance { get; private set; }
        private const int inputHistoryCapacity = 20;

        public ConsoleUI ui;
        public KeyCode toggleKey = KeyCode.BackQuote;
        public bool closeOnEscape = false;

        private ConsoleInputHistory inputHistory = new ConsoleInputHistory(inputHistoryCapacity);

        private void Awake()
        {
            if (Instance != null && Instance != this)
            {
                Destroy(this);
            }
            else
            {
                Instance = this;
            }

        }
        
        void OnEnable()
        {
            ui.onSubmitCommand += ExecuteCommand;
            ui.onClearConsole += inputHistory.Clear;
        }

        void OnDisable()
        {
            ui.onSubmitCommand -= ExecuteCommand;
            ui.onClearConsole -= inputHistory.Clear;
        }

        void Update()
        {
            if (Input.GetKeyDown(toggleKey))
            {
                ui.ToggleConsole();
            }

            if (!ui.isConsoleOpen)
            {
                return;
            }

            if (Input.GetKeyDown(KeyCode.Escape) && closeOnEscape)
            {
                ui.CloseConsole();
            }
            else if (Input.GetKeyDown(KeyCode.UpArrow))
            {
                NavigateInputHistory(true);
            }
            else if (Input.GetKeyDown(KeyCode.DownArrow))
            {
                NavigateInputHistory(false);
            }
            else if (Input.GetKeyDown(KeyCode.Tab))
            {
                ui.TabComplete();
            }
        }

        private void NavigateInputHistory(bool up)
        {
            string navigatedToInput = inputHistory.Navigate(up);
            ui.SetInputText(navigatedToInput);
        }

        private void ExecuteCommand(string input)
        {
            char[] split = new char[] {' '};
                string[] parts = input.Split(split, StringSplitOptions.RemoveEmptyEntries);
            string command = parts[0];
            string[] args = parts.Skip(1).ToArray();

            ui.AddNewOutputLine("> " + input);
            ConsoleCommandResult consoleCommandResult = ConsoleCommandsDatabase.ExecuteCommand(command, args);
            ui.AddNewOutputLine(consoleCommandResult.succeeded ? "Done" : "Failed");

            if (!consoleCommandResult.succeeded && !string.IsNullOrEmpty(consoleCommandResult.Output))
            {
                Debug.LogError(consoleCommandResult.Output);
            }

            if (!string.IsNullOrEmpty(consoleCommandResult.Output))
            {
                ui.AddNewOutputLine(consoleCommandResult.Output);
            }

            inputHistory.AddNewInputEntry(input);
        }
    }
}