newlon/scripts/systems/DescriptionParser.cs

using System.Collections.Generic;
using Newlon.Components.Plants;
using Newlon.Systems.Effects;
using Godot;
using Newlon.Resources;

namespace Newlon;

public static class DescriptionParser
{
	public static string GetParsed(EntityResource resource, Node searchScene)
	{
		string descriptionText;
		if (resource.isDescriptionParsed == false)
		{
			var unparsedDescription = TranslationServer.Translate(resource.DescriptionKey);
			var keys = GetRequestedKeys(unparsedDescription);
			FillPlaceholders(keys, resource, searchScene);
			ApplyModifiers(keys);
			descriptionText = ReplaceTextUsingDict(keys, unparsedDescription);

			resource.parsedDescription = descriptionText;
			resource.isDescriptionParsed = true;
		}
		else
		{
			descriptionText = resource.parsedDescription;
		}
		return descriptionText;
	}
	private static Dictionary<string, float> GetRequestedKeys(string text)
	{
		var result = new Dictionary<string, float>();
		int start = -1;

		for (int i = 0; i < text.Length; i++)
		{
			if (text[i] == '{')
			{
				start = i;
			}
			if (text[i] == '}')
			{
				if (start == -1) continue;
				var substr = text.Substr(start + 1, i - start - 1);
				if (result.ContainsKey(substr) == false)
					result.Add(substr, 0);
				start = -1;
			}
		}

		return result;
	}
	public static void FillPlaceholders(Dictionary<string, float> placeholderDictionary, EntityResource resource, Node searchScene)
	{
		var searchList = new List<GodotObject>() { resource, searchScene };
		while (searchList.Count > 0)
		{
			var lookedObject = searchList[0];
			searchList.RemoveAt(0);

			if (lookedObject is Node lookedNode)
				searchList.AddRange(lookedNode.GetChildren());
			if (lookedObject is Shooter shooter)
			{
				var projectile = shooter._projectile.Instantiate();
				searchList.Add(projectile);
			}
			foreach (var property in lookedObject.GetPropertyList())
			{
				if ((Variant.Type)property["type"].AsInt32() == Variant.Type.Object)
				{
					if (lookedObject.Get(property["name"].AsString()).AsGodotObject() is Effect effect)
					{
						searchList.Add(effect);
					}
				}
			}

			foreach (var key in placeholderDictionary.Keys)
			{
				string request = key.Split('|')[0];
				var namePropertyPair = request.Split('.');
				Variant property;
				if (namePropertyPair.Length == 2)
				{
					if ((namePropertyPair[0] == "?" && lookedObject != searchScene) || (namePropertyPair[0] != "?" && lookedObject is Node node && node.Name != namePropertyPair[0]))
					{
						continue;
					}
					property = lookedObject.Get(namePropertyPair[1]);
				}
				else
				{
					property = lookedObject.Get(namePropertyPair[0]);
				}
				if (property.VariantType == Variant.Type.Nil)
				{
					continue;
				}

				float value = property.As<float>();
				value = float.Round(value, 3);

				placeholderDictionary[key] = value;
			}


		}
	}
	public static void ApplyModifiers(Dictionary<string, float> toDictionary)
	{
		foreach (var key in toDictionary.Keys)
		{
			if (key.Split('|').Length < 2) continue;
			string[] modifiers = key.Split('|')[1..];

			float value = toDictionary[key];

			for (int i = 0; i < modifiers.Length; i++)
			{
				if (modifiers[i] != "")
				{
					switch (modifiers[i][0])
					{
						case '%':
							value *= 100;
							break;
						case '*':
							value *= GetNumberOrVar(1.0f);
							break;
						case '/':
							value /= GetNumberOrVar(1.0f);
							break;
						case '+':
							value += GetNumberOrVar(0.0f);
							break;
						case '-':
							value -= GetNumberOrVar(0.0f);
							break;
					}
				}
				float GetNumberOrVar(float defaultVal)
				{
					var contained = ContainsVariable(toDictionary, modifiers[i][1..]);
					if (contained != null)
					{
						return toDictionary[contained];
					}
					else if (float.TryParse(modifiers[i][1..], out float mult))
					{
						return mult;
					}
					return defaultVal;
				}
			}

			toDictionary[key] = value;
		}
		
	}
	public static string ContainsVariable(Dictionary<string, float> dictionary, string variableName, bool ignoreParent = false)
	{
		foreach (var key in dictionary.Keys)
		{
			var keyAsVar = key.Split('|')[0];
			if (ignoreParent)
			{
				if (keyAsVar.Split('.').Length == 2)
				{
					if (keyAsVar.Split('.')[1] == variableName) return key;
				}
				else if (keyAsVar == variableName)
				{
					return key;
				}
			}
			else
			{
				if (keyAsVar == variableName)
				{
					return key;
				}
			}
		}
		return null;
	}
	public static string ReplaceTextUsingDict(Dictionary<string, float> dictionary, string text)
	{
		var resStr = text;
		foreach (var key in dictionary.Keys)
		{
			resStr = resStr.Replace('{' + key + '}', dictionary[key].ToString());
		}
		return resStr;
	}
	
}