DialogueBox and DialogueParser

// DialogueBox Start
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DialogueBox : MonoBehaviour
{
    [SerializeField] private Text textArea;
    private const int MAX_CHAR = 256;

    private static string[] dialogueGroup;
    private string text;
    private int lineIdx = 0;
    private int idx = 0;
    private bool writingDialogue = false;
    private static bool newDialogue = false;

    /// <summary>
    /// sets the dialogue group and starts the reading
    /// </summary>
    /// <param name="group">new group of dialogue</param>
    public static void SetDialogueGroup(string[] group)
    {
        dialogueGroup = group;
        newDialogue = true; // when this is true the update method will start reading the dialogue
    }

    // Start is called before the first frame update
    void Start()
    {
        // setting this also sets the variables that tells the update function it can start running dialogue
        SetDialogueGroup(new string[] { DialogueParser.PullDialogue(2, "Assets\\Dialogue\\test.txt"), DialogueParser.PullDialogue(3, "Assets\\Dialogue\\test.txt") });

    }

    // used to test if loading dialogue later will trigger it to write
    void LaterInvoke()
    {
        SetDialogueGroup(new string[] { DialogueParser.PullDialogue(2, "Assets\\Dialogue\\test.txt"), DialogueParser.PullDialogue(3, "Assets\\Dialogue\\test.txt") });
    }

    // Update is called once per frame
    void Update()
    {
        // If there is a dialogue group run this
        if (dialogueGroup != null)
        {
            // if the dialogue is new start reading it for the first time
            if (newDialogue)
            {
                StartReadingNewDialogue();
            }

            // handles moving to new dialogue and ending the current dialogue
            DialogueSpaceDown();
        }

    }

    // sets the variabes for reading new dialogue and actually starting the coroutine
    private void StartReadingNewDialogue()
    {
        newDialogue = false;
        writingDialogue = true;
        lineIdx = 0;
        idx = 0;
        text = dialogueGroup[lineIdx];
        StartCoroutine("TypeTextInDialogueBox");
    }

    // handles writing skipping writing and ending the dialogue sequence
    private void DialogueSpaceDown()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {

            if (writingDialogue)
            {
                textArea.text = text;
                idx = text.Length;
            }

            if (lineIdx < dialogueGroup.Length - 1 && !writingDialogue)
            {
                textArea.text = "";
                lineIdx++;
                text = dialogueGroup[lineIdx];
                idx = 0;
                writingDialogue = true;
                StartCoroutine("TypeTextInDialogueBox");
            }

            if (lineIdx > dialogueGroup.Length - 1 && !writingDialogue)
            {
                textArea.text = "";
                dialogueGroup = null;
                lineIdx = 0;
                idx = 0;
            }
        }
    }

    // coroutine that types out text line by line
    private IEnumerator TypeTextInDialogueBox()
    {
        textArea.text += text[idx++];

        yield return new WaitForSeconds(0.03f);

        if (idx != text.Length)
        {
            StartCoroutine("TypeTextInDialogueBox");
        }
        else
        {
            writingDialogue = false;
            if (lineIdx == dialogueGroup.Length - 1) lineIdx++;
        }

    }
}

// Dialogue Parser Start

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;

public class DialogueParser : MonoBehaviour
{
    public static string PullDialogue(int line, string file)
    {
        return File.ReadAllLines(file)[line-1];
    }
}