New dev build

Models/IPackageManager.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+
+namespace CrossLangDevStudio.Models;
+
+public interface IPackageManager
+{
+    Task InstallPackageAsync(string name, CrossLangVersion version);
+    string Filter { get; }
+    void UninstallPackage(string name);
+
+    IEnumerable<CrossLangDependency> GetInstalledPackages();
+}
+
+public static class PackageManagerExtensions
+{
+    public static string Summarize(this string txt)
+    {
+        var lines = txt.Replace("\r", "").Split('\n');
+        bool needsthreedots = false;
+        if (lines.Length > 1) needsthreedots = true;
+        if (lines.Length == 0) return "";
+        if (lines[0].Length > 120) { needsthreedots = true; lines[0] = lines[0].Substring(0, 120); }
+        if (needsthreedots) return $"{lines[0]}...";
+        return lines[0];
+    }
+    public static bool IsPackageInstalled(this IPackageManager pm, string name)
+    {
+        foreach (var item in pm.GetInstalledPackages())
+        {
+            if (item.Name == name) return true;
+        }
+        return false;
+    }
+    public static async Task InstallPackageAsync(this IPackageManager pm, CrossLangDependency dep)
+    {
+        await pm.InstallPackageAsync(dep.Name, dep.Version);
+    }
+}

Models/ProjectPackageManager.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.IO;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Newtonsoft.Json;
+
+namespace CrossLangDevStudio.Models;
+
+public class ProjectPackageManager : IPackageManager
+{
+    public ProjectPackageManager(string path)
+    {
+        Path = path;
+    }
+    public string Path { get; init; }
+    public string Filter => "lib,compile_tool";
+
+    public IEnumerable<CrossLangDependency> GetInstalledPackages()
+    {
+        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(File.ReadAllText(Path));
+        if (cfg is not null)
+        {
+            foreach (var item in cfg.Dependencies)
+            {
+                yield return item;
+            }
+        }
+    }
+
+    public async Task InstallPackageAsync(string name, CrossLangVersion version)
+    {
+        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(await File.ReadAllTextAsync(Path)) ?? new CrossLangConfig();
+        cfg.Dependencies ??= new List<CrossLangDependency>();
+        bool has = false;
+        foreach (var item in cfg.Dependencies)
+        {
+            if (item.Name == name)
+            {
+                has = true;
+                if(version.CompareTo(item.Version) > 0)
+                    item.Version = version;
+                break;
+            }
+        }
+        if (!has) cfg.Dependencies.Add(new CrossLangDependency { Name = name, Version = version });
+        await File.WriteAllTextAsync(Path, JsonConvert.SerializeObject(cfg, Formatting.Indented, new JsonSerializerSettings(){NullValueHandling= NullValueHandling.Ignore}));
+
+    }
+
+
+
+    public void UninstallPackage(string name)
+    {
+        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(File.ReadAllText(Path)) ?? new CrossLangConfig();
+        cfg.Dependencies ??= new List<CrossLangDependency>();
+
+        foreach (var item in cfg.Dependencies)
+        {
+            if (item.Name == name)
+            {
+                cfg.Dependencies.Remove(item);
+
+                break;
+            }
+        }
+        File.WriteAllText(Path, JsonConvert.SerializeObject(cfg, Formatting.Indented,new JsonSerializerSettings(){NullValueHandling= NullValueHandling.Ignore}));
+    }
+}