coin_alerts/Picasso.cs

using SignalsTest;
using System;
using SixLabors.Fonts;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Drawing;
using SixLabors.ImageSharp.Drawing.Processing;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;
using Newtonsoft.Json;

public class Picasso{
    public static void DrawChart(List<TAReport> reports, decimal max, decimal min, decimal volMax, string filename="test"){
        // float height = (float)Math.Ceiling(max - min) * 2f;
        // float width = ((float)height / 9f) * 16f;
        decimal heightRange = max-min;
        float height=1080;
        float width = 1920;
        float widthMultiplier = width / (float)reports.Count;
        float heightMultiplier = (height/ (float)heightRange) * 0.6f;

        float candlesOffset = 0.3f * height;
        float volumeSize = 0.2f * height;
        using (Image img = new Image<Rgba32>((int)width + 100, (int)height, Color.FromRgb(13,18,25))){
            
            #region CANDLES
            for(int i=0; i < reports.Count; i++){
                // img.Mutate(ctx=> ctx.DrawLine()))
                PointF[] points = new PointF[2];

                float openVal1 = (float)(reports[i].candle.Open - min) * heightMultiplier;
                float closeVal1 = (float)(reports[i].candle.Close - min)* heightMultiplier;
                points[0] =new PointF(i * widthMultiplier, openVal1 + candlesOffset);
                points[1] =new PointF(i * widthMultiplier, closeVal1+ candlesOffset);

                PointF[] rangePoints = new PointF[2];

                float highVal = (float)(reports[i].candle.High-min)* heightMultiplier;
                float lowVal = (float)(reports[i].candle.Low-min)* heightMultiplier;

                rangePoints[0] = new PointF(i * widthMultiplier, highVal+ candlesOffset);
                rangePoints[1] = new PointF(i * widthMultiplier, lowVal+ candlesOffset);
                
                PointF[] volumePoints = new PointF[2];
                volumePoints[0] = new PointF(i * widthMultiplier, 0);
                volumePoints[1] = new PointF(i * widthMultiplier, ((float)reports[i].candle.Volume / (float)volMax) * volumeSize);

                Color candleColor = reports[i].candle.Close > reports[i].candle.Open ? Color.Green : Color.Red;
    
                img.Mutate(ctx=> ctx.
                    DrawLine(candleColor, 10, points).
                    DrawLine(candleColor, 3, rangePoints).
                    DrawLine(candleColor, 10, volumePoints)
                );

                #endregion
                #region TWS
                
                PointF[] bottomPoints = new PointF[2];
                bottomPoints[0] =  new PointF(i * widthMultiplier, lowVal+ candlesOffset);
                bottomPoints[1] = new PointF(i * widthMultiplier, lowVal- 15+ candlesOffset);
                
                if(reports[i].TWS > 1){
                    Color TWSColor = Color.Blue;
                    if(reports[i].TWS == 2){
                        TWSColor = Color.Cyan;
                    }else if(reports[i].TWS== 3){
                        TWSColor = Color.White;
                    }

                    float TWSHeight = 15;
                    
                    if(i > 22){
                        bool hasCrossedST = false;
                        bool hasCrossedMA = false;
                        for(int z = 0; z < 20; z++){
                            if(!reports[i-z].STUp && reports[i].STUp){
                                hasCrossedST=true;
                            }

                            if(reports[i-z].SMA20 < reports[i-z].Open && reports[i].SMA20 > reports[i].Open){
                                hasCrossedMA=true;
                            }
                        }

                        if(hasCrossedMA) TWSHeight+=15;
                        if(hasCrossedST) TWSHeight+=15;
                    }
                    

                    img.Mutate(ctx=>ctx.DrawLine(TWSColor, TWSHeight, bottomPoints));
                }
                #endregion

            }
            // Console.WriteLine("Getting paths");
            // object t = GetPropByName(reports[reports.Count- 1], "SMA7");
            // Console.WriteLine(t);
            // Console.WriteLine(float.Parse(t.ToString()));
            
            #region OVERLAY LINES
            //Overlay
            IPath sma20Path = GetPath(reports, "SMA20", widthMultiplier,(float)heightMultiplier, (float)min, candlesOffset);
            IPath sma50Path = GetPath(reports, "SMA50", widthMultiplier,(float)heightMultiplier, (float)min, candlesOffset);
            IPath sma200Path = GetPath(reports, "SMA200", widthMultiplier,(float)heightMultiplier, (float)min, candlesOffset);

            IPath stPath = GetPath(reports, "ST", widthMultiplier,(float)heightMultiplier, (float)min, candlesOffset);
            #endregion
            //NewChart
            FontFamily fontFamily;
            float TextFontSize = 64f;
            string TextFont = "Noto Sans Mono";
            if (!SystemFonts.TryGet(TextFont, out fontFamily))
                throw new Exception($"Couldn't find font {TextFont}");

            var font = fontFamily.CreateFont(TextFontSize, FontStyle.Regular);

            img.Mutate(ctx => ctx.Draw(Color.Yellow, 2, sma20Path).
            Draw(Color.Purple, 2, sma50Path).
            Draw(Color.Cyan, 2, sma200Path).
            Draw(Color.Green, 3, stPath).
            Flip(FlipMode.Vertical).
            DrawText(filename, font,new Color(Rgba32.ParseHex("#FFFFFF")), new PointF(10,10)));
            
            img.Save($"{filename}.png");
        }
    }

    #region HELPERS
    static IPath GetPath(List<TAReport> reports, string propName, float widthMultiplier,float heightMultiplier, float min, float offset =0){
        PathBuilder builder = new PathBuilder();
        builder.SetOrigin(new PointF(0,0));
        for(int i=0; i < reports.Count; i++){
            float newVal = float.Parse(GetPropByName(reports[i],propName).ToString() ?? "0");
           // Console.WriteLine( newVal);

            float prevVal = i > 0 ? float.Parse(GetPropByName(reports[i-1],propName).ToString() ?? "0") : 0;
           // Console.WriteLine( prevVal);
            float preValY =( prevVal  - min) * heightMultiplier ;
            float newValY=(newVal - min) * heightMultiplier;
            PointF prevPoint = new PointF((i-1)* widthMultiplier, (preValY) +offset);
            PointF newPoint = new PointF(i * widthMultiplier, (newValY) + offset);
            // Console.WriteLine(newValY);
            builder.AddLine(prevPoint, newPoint);
        }

        return builder.Build();
    }

    static object GetPropByName(TAReport report, string propName){
        string json = report.toJson();
        Dictionary<string,string> dic = JsonConvert.DeserializeObject<Dictionary<string,string>>(json) ?? new Dictionary<string, string>();
       // Console.WriteLine(dic[propName]);
        return dic[propName];
    }

    #endregion
}