commit 3365521283acc617934db8307349d03bfbc9a119
Author: redxef <federanko.manuel@gmail.com>
Date:   Thu Jun 27 01:47:44 2024 +0200

    Initial commit.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..09e83c2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+**/obj/
+**/bin/
+cache/
+config/
diff --git a/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/Parser.cs b/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/Parser.cs
new file mode 100644
index 0000000..1393ac6
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/Parser.cs
@@ -0,0 +1,198 @@
+using System.Diagnostics;
+
+namespace Jellyfin.Plugin.SmartPlaylist.Lisp.Compiler {
+    interface IAddable<T> where T : IAddable<T> {
+        static abstract T operator +(T left, T right);
+    }
+
+    interface ISubtractable<T> where T : ISubtractable<T> {
+        static abstract T operator -(T left, T right);
+    }
+
+    interface IMultiplicatable<T> where T : IMultiplicatable<T> {
+        static abstract T operator *(T left, T right);
+    }
+
+    interface IDivisible<T> where T : IDivisible<T> {
+        static abstract T operator /(T left, T right);
+        static abstract T operator %(T left, T right);
+    }
+
+    interface IComparable<T, E> where T : IComparable<T, E> {
+        static abstract E operator >(T left, T right);
+        static abstract E operator <(T left, T right);
+        static abstract E operator >=(T left, T right);
+        static abstract E operator <=(T left, T right);
+        static abstract E operator ==(T left, T right);
+        static abstract E operator !=(T left, T right);
+    }
+
+    public abstract class Expression : IFormattable {
+        public abstract string ToString(string? format, IFormatProvider? provider);
+    }
+    public abstract class Atom : Expression {}
+    public class Symbol : Atom {
+        private readonly string _name;
+        public Symbol(string name) {
+            _name = name;
+        }
+        public string name { get => _name; }
+        public override string ToString(string? format, IFormatProvider? provider) {
+            return _name;
+        }
+    }
+    public class Boolean : Atom {
+        private readonly bool _value;
+        public Boolean(bool value) {
+            _value = value;
+        }
+        public bool value { get => _value; }
+        public override string ToString(string? format, IFormatProvider? provider) {
+            return _value? "t" : "nil";
+        }
+    }
+    public class Integer : Atom, IAddable<Integer>, ISubtractable<Integer>, IMultiplicatable<Integer>, IDivisible<Integer>, IComparable<Integer, Boolean> {
+        private readonly int _value;
+        public Integer(int value) {
+            _value = value;
+        }
+        public int value { get => _value; }
+        public override string ToString(string? format, IFormatProvider? provider) {
+            return _value.ToString("0", provider);
+        }
+        public static Integer operator +(Integer a, Integer b) {
+            return new Integer(a.value + b.value);
+        }
+        public static Integer operator -(Integer a, Integer b) {
+            return new Integer(a.value - b.value);
+        }
+        public static Integer operator *(Integer a, Integer b) {
+            return new Integer(a.value * b.value);
+        }
+        public static Integer operator /(Integer a, Integer b) {
+            return new Integer(a.value / b.value);
+        }
+        public static Integer operator %(Integer a, Integer b) {
+            return new Integer(a.value % b.value);
+        }
+        public static Boolean operator >(Integer a, Integer b) {
+            return new Boolean(a.value > b.value);
+        }
+        public static Boolean operator <(Integer a, Integer b) {
+            return new Boolean(a.value < b.value);
+        }
+        public static Boolean operator >=(Integer a, Integer b) {
+            return new Boolean(a.value >= b.value);
+        }
+        public static Boolean operator <=(Integer a, Integer b) {
+            return new Boolean(a.value <= b.value);
+        }
+        public static Boolean operator ==(Integer a, Integer b) {
+            return new Boolean(a.value == b.value);
+        }
+        public static Boolean operator !=(Integer a, Integer b) {
+            return new Boolean(a.value != b.value);
+        }
+    }
+    public class String : Atom, IAddable<String> {
+        private readonly string _value;
+        public String(string value) {
+            _value = value;
+        }
+        public string value { get => _value; }
+        public override string ToString(string? format, IFormatProvider? provider) {
+            return "\"" + _value + "\"";
+        }
+        public static String operator +(String a, String b) {
+            return new String (a.value + b.value);
+        }
+    }
+    public class List : Expression {
+        private IList<Expression> _expressions;
+        public List(IList<Expression> expressions) {
+            _expressions = expressions;
+        }
+        public IList<Expression> expressions { get => _expressions; }
+        public override string ToString(string? format, IFormatProvider? provider) {
+            string r = "(";
+            foreach (var e in _expressions) {
+                r += " ";
+                r += e.ToString("0", provider);
+            }
+            return r + ")";
+        }
+        public static List operator +(List a, List b) {
+            IList<Expression> r = new List<Expression>();
+            r.Concat(a.expressions);
+            r.Concat(b.expressions);
+            return new List (r);
+        }
+    }
+
+    public class Parser {
+        private StringTokenStream _sts;
+        public Parser(StringTokenStream tokens) {
+            _sts = tokens;
+        }
+
+        public Expression parse() {
+            Token<string> token = _sts.get();
+            switch (token) {
+                case GroupingToken gt:
+                    return parse_grouping(gt, gt.closing_value);
+                case AtomToken at:
+                    return parse_atom(at);
+                case OperatorToken ot:
+                    return new Symbol(ot.value);
+                case SpaceToken sp:
+                    return parse();
+            }
+            return parse();
+        }
+
+        Expression parse_string(GroupingToken start, GroupingToken end) {
+            Debug.Assert(start == end);
+            Debug.Assert("'\"".Contains(start.value));
+            string r = "";
+            while (_sts.available() > 0) {
+                Token<string> t = _sts.get();
+                if (t == end) {
+                    break;
+                }
+                r += t.value;
+            }
+            _sts.commit();
+            return new String(r);
+        }
+
+        Expression parse_grouping(GroupingToken start, GroupingToken end) {
+            IList<Expression> expressions = new List<Expression>();
+            while (_sts.available() > 0) {
+                Token<string> t = _sts.get();
+                if (t.Equals(end)) {
+                    _sts.commit();
+                    break;
+                }
+                _sts.rewind(1);
+                expressions.Add(parse());
+            }
+            return new List(expressions);
+        }
+
+        Expression parse_atom(AtomToken at) {
+            int parsed_value;
+            if (int.TryParse(at.value, out parsed_value)) {
+                _sts.commit();
+                return new Integer(parsed_value);
+            }
+            if (at.value.Equals("t")) {
+                return new Boolean(true);
+            }
+            if (at.value.Equals("nil")) {
+                return new Boolean(false);
+            }
+            _sts.commit();
+            return new Symbol(at.value);
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/TokenStream.cs b/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/TokenStream.cs
new file mode 100644
index 0000000..58f5925
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/Lisp/Compiler/TokenStream.cs
@@ -0,0 +1,144 @@
+using System.Reflection;
+using Jellyfin.Plugin.SmartPlaylist.Util;
+
+namespace Jellyfin.Plugin.SmartPlaylist.Lisp.Compiler {
+    public interface IToken<T> {
+        T value { get; }
+        abstract static IToken<T>? take<E>(E program);
+    }
+
+    public abstract class Token<T>: IToken<T> , IEquatable<Token<T>> {
+        protected readonly T _value;
+        protected Token(T value) {
+            _value = value;
+        }
+        public T value { get => _value; }
+        public static IToken<T>? take<E>(E program) {
+            throw new NotImplementedException("Subclass this class");
+        }
+        public bool Equals(Token<T>? b) {
+            return b != null && _value != null && _value.Equals(b._value);
+        }
+    }
+
+    class SpaceToken : Token<string> {
+        private SpaceToken(string value) : base(value) {}
+        private static IToken<string>? take(CharStream program) {
+            if (program.available() == 0) {
+                return null;
+            }
+            if (program.get() == ' ') {
+                return new SpaceToken(" ");
+            }
+            return null;
+        }
+    }
+
+    class GroupingToken: Token<string> {
+        private GroupingToken(string value) : base(value) {}
+        private static IToken<string>? take(CharStream program) {
+            if (program.available() == 0) {
+                return null;
+            }
+            char t = program.get();
+            if ("()\"'".Contains(t)) {
+                return new GroupingToken(t.ToString());
+            }
+            return null;
+        }
+        private GroupingToken? _closing_value() {
+            if (_value == "(") {
+                return new GroupingToken(")");
+            } else if (_value == ")") {
+                return null;
+            }
+            return new GroupingToken(_value);
+        }
+        public GroupingToken? closing_value { get => _closing_value(); }
+    }
+
+    class AtomToken : Token<string> {
+        private AtomToken(string value) : base(value) {}
+        private static IToken<string>? take(CharStream program) {
+            string value = "";
+            while (program.available() > 0) {
+                char t = program.get();
+                if (!"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".Contains(t)) {
+                    if (value.Equals("")) {
+                        return null;
+                    }
+                    program.rewind(1);
+                    return new AtomToken(value);
+                }
+                value += t;
+            }
+            return null;
+        }
+    }
+
+    class OperatorToken : Token<string> {
+        private OperatorToken(string value) : base(value) {}
+        private static IToken<string>? take(CharStream program) {
+            if (program.available() == 0) {
+                return null;
+            }
+            return new OperatorToken(program.get().ToString());
+            //char t = program.get();
+            //if ("+-*/%".Contains(t)) {
+            //    return new OperatorToken(t.ToString());
+            //}
+            //return null;
+        }
+    }
+
+    class CharStream: Stream<char> {
+        public CharStream(IList<char> items) : base(items) {}
+        public CharStream(string items) : base(items.ToCharArray().Cast<char>().ToList()) {}
+    }
+
+    public class StringTokenStream : Stream<Token<string>> {
+        private static readonly IList<Type> _classes = new List<Type> {
+            typeof(SpaceToken),
+            typeof(GroupingToken),
+            typeof(AtomToken),
+            typeof(OperatorToken),
+        };
+        protected StringTokenStream(IList<Token<string>> tokens) : base(tokens) {}
+        private static StringTokenStream generate(CharStream program) {
+            IList<Token<string>> result = new List<Token<string>>();
+            int prev_avail = 0;
+            while (true) {
+                if (prev_avail == program.available() && prev_avail == 0) {
+                    break;
+                } else if (prev_avail == program.available()) {
+                    throw new ApplicationException("Program is invalid");
+                }
+                prev_avail = program.available();
+                foreach (Type c in _classes) {
+                    Token<string>? t = (Token<string>?) c.GetMethod(
+                        "take",
+                        BindingFlags.NonPublic | BindingFlags.Static,
+                        null,
+                        CallingConventions.Any,
+                        new Type[] { typeof(CharStream) },
+                        null
+                    )?.Invoke(
+                        null,
+                        new object[]{program}
+                    );
+                    if (t == null) {
+                        program.rewind();
+                        continue;
+                    }
+                    program.commit();
+                    result.Add(t);
+                    break;
+                }
+            }
+            return new StringTokenStream(result);
+        }
+        public static StringTokenStream generate(string program) {
+            return StringTokenStream.generate(new CharStream(program));
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/Lisp/Interpreter.cs b/Jellyfin.Plugin.SmartPlaylist/Lisp/Interpreter.cs
new file mode 100644
index 0000000..70e3d06
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/Lisp/Interpreter.cs
@@ -0,0 +1,241 @@
+using Jellyfin.Plugin.SmartPlaylist.Lisp.Compiler;
+
+namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
+    public class EnvironmentEntry {};
+    public class Entry: EnvironmentEntry {
+        private readonly Expression _expression;
+        public Entry(Expression expression) {
+            _expression = expression;
+        }
+        public Expression expression { get => _expression; }
+    };
+    public class NOOPEntry: Entry {
+        public NOOPEntry() : base(new Compiler.Boolean(false)) {}
+    }
+    public class Function : EnvironmentEntry {
+        private readonly Func<IList<Expression>, Expression> _func;
+        public Function(Func<IList<Expression>, Expression> func) {
+            _func = func;
+        }
+        public Func<IList<Expression>, Expression> func { get => _func; }
+    }
+
+    public class Environment : Dictionary<string, EnvironmentEntry> {
+        public static Environment create() {
+            Environment e = new Environment();
+            e.Add("+", new Function(op_add));
+            e.Add("-", new Function(op_sub));
+            e.Add("*", new Function(op_mul));
+            e.Add("/", new Function(op_div));
+            e.Add("%", new Function(op_rem));
+            e.Add(">", new Function(op_gt));
+            e.Add("<", new Function(op_lt));
+            e.Add(">=", new Function(op_ge));
+            e.Add("<=", new Function(op_le));
+            e.Add("==", new Function(op_eq));
+            e.Add("!=", new Function(op_ne));
+            e.Add("abs", new Function(op_abs));
+            e.Add("append", new Function(op_append));
+            e.Add("apply", new Function(op_apply));
+            e.Add("begin", new Function(op_begin));
+            return e;
+        }
+
+        private static T op_agg<T>(Func<T, T, T> op, IList<T> args) {
+            T agg = args[0];
+            foreach (var arg in args.Skip(1)) {
+                agg = op(agg, arg);
+            }
+            return agg;
+        }
+
+        private static Expression op_add(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_agg((a, b) => a + b, args.Select(x => (Integer) x).ToList());
+                case Compiler.String s:
+                    return op_agg((a, b) => a + b, args.Select(x => (Compiler.String) x).ToList());
+                //case Compiler.List:
+                //    return op_agg((a, b) => a + b, args.Select(x => (Compiler.List) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to add these types");
+        }
+
+        private static Expression op_sub(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_agg((a, b) => a - b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_mul(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_agg((a, b) => a * b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_div(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_agg((a, b) => a / b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_rem(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_agg((a, b) => a % b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static E op_cmp<T, E>(Func<T, T, E> op, IList<T> args) {
+            T first = args[0];
+            T second = args[1];
+            return op(first, second);
+        }
+
+        private static Expression op_gt(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a > b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_lt(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a < b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_ge(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a >= b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_le(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a <= b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_eq(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a == b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_ne(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return op_cmp((a, b) => a != b, args.Select(x => (Integer) x).ToList());
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_abs(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case Integer i:
+                    return i.value >= 0 ? i : new Integer(-i.value);
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_append(IList<Expression> args) {
+            Expression first = args[0];
+            switch (first) {
+                case List l:
+                    return l + new List(args);
+            }
+            throw new ApplicationException("Don't know how to subtract these types");
+        }
+
+        private static Expression op_apply(IList<Expression> args) {
+            IList<EnvironmentEntry> e_list = (IList<EnvironmentEntry>) args.Select(x => new Entry(x)).ToList();
+            if (e_list.Count != 2) {
+                throw new ApplicationException("Expected exactly two arguments");
+            }
+            if (e_list[0].GetType() != typeof(Function)) {
+                throw new ApplicationException("Expected first argument to be a function to apply");
+            }
+            Function f = (Function) e_list[0];
+            IList<Expression> new_args = e_list.Skip(1).Select(x => ((Entry) x).expression).ToList();
+            return f.func(args);
+        }
+
+        private static Expression op_begin(IList<Expression> args) {
+            return args.Last();
+        }
+
+        public EnvironmentEntry eval(Expression expression) {
+            switch (expression) {
+                case Symbol s:
+                    return this[s.name];
+                case Integer i:
+                    return new Entry(i);
+                case Compiler.String s_:
+                    return new Entry(s_);
+                case List list:
+                    if (list.expressions[0].GetType() == typeof(Symbol)) {
+                        if (((Symbol) list.expressions[0]).name.Equals("if")) {
+                            Compiler.Boolean test = (Compiler.Boolean) ((Entry) eval(list.expressions[1])).expression;
+                            return eval(list.expressions[2 + (test.value? 0 : 1)]);
+                        }
+                        if (((Symbol) list.expressions[0]).name.Equals("define")) {
+                            Symbol test;
+                            if (list.expressions[1].GetType() == typeof(Symbol)) {
+                                test = (Symbol) list.expressions[1];
+                            } else {
+                                test = (Symbol) ((Entry) eval(list.expressions[1])).expression;
+                            }
+                            this[test.name] = eval(list.expressions[2]);
+                            return new NOOPEntry();
+                        }
+                    }
+                    IList<EnvironmentEntry> e_list = list.expressions.Select(x => eval(x)).ToList();
+                    if (e_list.Count > 0 && e_list[0].GetType() == typeof(Function)) {
+                        Function f = (Function) e_list[0];
+                        IList<Expression> args = e_list.Skip(1).Select(x => ((Entry) x).expression).ToList();
+                        return new Entry(f.func(args));
+                    }
+                    return new Entry(new List(list.expressions.Select(x => ((Entry) eval(x)).expression).ToList()));
+            }
+            throw new ApplicationException("Not handled case");
+        }
+        public EnvironmentEntry eval(Parser p) {
+            return eval(p.parse());
+        }
+        public EnvironmentEntry eval(StringTokenStream sts) {
+            return eval(new Parser(sts));
+        }
+        public EnvironmentEntry eval(string p) {
+            return eval(StringTokenStream.generate(p));
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/Plugin.cs b/Jellyfin.Plugin.SmartPlaylist/Plugin.cs
new file mode 100644
index 0000000..c51caf5
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/Plugin.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Plugins;
+using MediaBrowser.Model.Plugins;
+using MediaBrowser.Model.Serialization;
+
+namespace Jellyfin.Plugin.SmartPlaylist {
+    public class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages {
+        public Plugin(
+            IApplicationPaths applicationPaths,
+            IXmlSerializer xmlSerializer
+        ) : base (applicationPaths, xmlSerializer) {
+            Instance = this;
+        }
+        public static Plugin? Instance {get; private set; }
+        public override string Name => "Smart Playlist";
+        public override Guid Id => Guid.Parse("dd2326e3-4d3e-4bfc-80e6-28502c1131df");
+        public IEnumerable<PluginPageInfo> GetPages() {
+            return new[] {
+                new PluginPageInfo {
+                    Name = this.Name,
+                    EmbeddedResourcePath = string.Format(CultureInfo.InvariantCulture, "{0}.configPage.html", GetType().Namespace)
+                }
+            };
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/PluginConfiguration.cs b/Jellyfin.Plugin.SmartPlaylist/PluginConfiguration.cs
new file mode 100644
index 0000000..ee2e7f6
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/PluginConfiguration.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Plugins;
+using MediaBrowser.Model.Plugins;
+using MediaBrowser.Model.Serialization;
+
+namespace Jellyfin.Plugin.SmartPlaylist {
+    public class PluginConfiguration : BasePluginConfiguration {
+        public PluginConfiguration(
+        ) {
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/ScheduledTasks/GeneratePlaylist.cs b/Jellyfin.Plugin.SmartPlaylist/ScheduledTasks/GeneratePlaylist.cs
new file mode 100644
index 0000000..3f69d19
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/ScheduledTasks/GeneratePlaylist.cs
@@ -0,0 +1,34 @@
+using MediaBrowser.Model.Tasks;
+using Microsoft.Extensions.Logging;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Playlists;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.IO;
+
+namespace Jellyfin.Plugin.SmartPlaylist.ScheduledTasks {
+    public class GeneratePlaylist : IScheduledTask {
+        private readonly ILogger _logger;
+        public GeneratePlaylist(
+            ILogger<Plugin> logger
+        ) {
+            _logger = logger;
+            _logger.LogInformation("Constructed Task");
+        }
+        public string Category => "Library";
+        public string Name => "(re)generate Smart Playlists";
+        public string Description => "Generate or regenerate all Smart Playlists";
+        public string Key => nameof(GeneratePlaylist);
+        public IEnumerable<TaskTriggerInfo> GetDefaultTriggers() {
+            return new[] {
+                new TaskTriggerInfo {
+                    IntervalTicks = TimeSpan.FromMinutes(1).Ticks,
+                    Type = TaskTriggerInfo.TriggerInterval,
+                }
+            };
+        }
+        public async Task ExecuteAsync(IProgress<double> progress, CancellationToken cancellationToken) {
+            _logger.LogInformation("This is a test");
+        }
+    }
+}
diff --git a/Jellyfin.Plugin.SmartPlaylist/Util/Stream.cs b/Jellyfin.Plugin.SmartPlaylist/Util/Stream.cs
new file mode 100644
index 0000000..81bb9d8
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/Util/Stream.cs
@@ -0,0 +1,47 @@
+namespace Jellyfin.Plugin.SmartPlaylist.Util {
+    public interface IStream<T> {
+        int available();
+        T get();
+        int commit();
+        int rewind();
+        int rewind(int n);
+    }
+
+    public class Stream<T> : IStream<T> {
+        private readonly IList<T> _items;
+        private int _cursor;
+        private int _ephemeral_cursor;
+
+        protected Stream(IList<T> items) {
+            _items = items;
+            _cursor = 0;
+            _ephemeral_cursor = 0;
+        }
+
+        public int available() {
+            return _items.Count - _ephemeral_cursor;
+        }
+        public T get() {
+            return _items[_ephemeral_cursor++];
+        }
+        public int commit() {
+            int diff = _ephemeral_cursor - _cursor;
+            _cursor = _ephemeral_cursor;
+            return diff;
+        }
+        public int rewind() {
+            int diff = _ephemeral_cursor - _cursor;
+            _ephemeral_cursor = _cursor;
+            return diff;
+        }
+        public int rewind(int n) {
+            int diff = _ephemeral_cursor - _cursor;
+            if (diff < n) {
+                n = diff;
+            }
+            _ephemeral_cursor -= n;
+            return n;
+        }
+    }
+}
+
diff --git a/Jellyfin.Plugin.SmartPlaylist/configPage.html b/Jellyfin.Plugin.SmartPlaylist/configPage.html
new file mode 100644
index 0000000..a90e708
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/configPage.html
@@ -0,0 +1,79 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Template</title>
+</head>
+<body>
+    <div id="TemplateConfigPage" data-role="page" class="page type-interior pluginConfigurationPage" data-require="emby-input,emby-button,emby-select,emby-checkbox">
+        <div data-role="content">
+            <div class="content-primary">
+                <form id="TemplateConfigForm">
+                    <div class="selectContainer">
+                        <label class="selectLabel" for="Options">Several Options</label>
+                        <select is="emby-select" id="Options" name="Options" class="emby-select-withcolor emby-select">
+                            <option id="optOneOption" value="OneOption">One Option</option>
+                            <option id="optAnotherOption" value="AnotherOption">Another Option</option>
+                        </select>
+                    </div>
+                    <div class="inputContainer">
+                        <label class="inputLabel inputLabelUnfocused" for="AnInteger">An Integer</label>
+                        <input id="AnInteger" name="AnInteger" type="number" is="emby-input" min="0" />
+                        <div class="fieldDescription">A Description</div>
+                    </div>
+                    <div class="checkboxContainer checkboxContainer-withDescription">
+                        <label class="emby-checkbox-label">
+                            <input id="TrueFalseSetting" name="TrueFalseCheckBox" type="checkbox" is="emby-checkbox" />
+                            <span>A Checkbox</span>
+                        </label>
+                    </div>
+                    <div class="inputContainer">
+                        <label class="inputLabel inputLabelUnfocused" for="AString">A String</label>
+                        <input id="AString" name="AString" type="text" is="emby-input" />
+                        <div class="fieldDescription">Another Description</div>
+                    </div>
+                    <div>
+                        <button is="emby-button" type="submit" class="raised button-submit block emby-button">
+                            <span>Save</span>
+                        </button>
+                    </div>
+                </form>
+            </div>
+        </div>
+        <script type="text/javascript">
+            var TemplateConfig = {
+                pluginUniqueId: 'dd2326e3-4d3e-4bfc-80e6-28502c1131df'
+            };
+
+            document.querySelector('#TemplateConfigPage')
+                .addEventListener('pageshow', function() {
+                    Dashboard.showLoadingMsg();
+                    ApiClient.getPluginConfiguration(TemplateConfig.pluginUniqueId).then(function (config) {
+                        document.querySelector('#Options').value = config.Options;
+                        document.querySelector('#AnInteger').value = config.AnInteger;
+                        document.querySelector('#TrueFalseSetting').checked = config.TrueFalseSetting;
+                        document.querySelector('#AString').value = config.AString;
+                        Dashboard.hideLoadingMsg();
+                    });
+                });
+
+            document.querySelector('#TemplateConfigForm')
+                .addEventListener('submit', function(e) {
+                Dashboard.showLoadingMsg();
+                ApiClient.getPluginConfiguration(TemplateConfig.pluginUniqueId).then(function (config) {
+                    config.Options = document.querySelector('#Options').value;
+                    config.AnInteger = document.querySelector('#AnInteger').value;
+                    config.TrueFalseSetting = document.querySelector('#TrueFalseSetting').checked;
+                    config.AString = document.querySelector('#AString').value;
+                    ApiClient.updatePluginConfiguration(TemplateConfig.pluginUniqueId, config).then(function (result) {
+                        Dashboard.processPluginConfigurationUpdateResult(result);
+                    });
+                });
+
+                e.preventDefault();
+                return false;
+            });
+        </script>
+    </div>
+</body>
+</html>
diff --git a/Jellyfin.Plugin.SmartPlaylist/jellyfin-smart-playlist.csproj b/Jellyfin.Plugin.SmartPlaylist/jellyfin-smart-playlist.csproj
new file mode 100644
index 0000000..ae98220
--- /dev/null
+++ b/Jellyfin.Plugin.SmartPlaylist/jellyfin-smart-playlist.csproj
@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>jellyfin_smart_playlist</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Jellyfin.Controller" Version="10.9.7" />
+    <PackageReference Include="Jellyfin.Model" Version="10.9.7" />
+  </ItemGroup>
+
+</Project>
diff --git a/Test/test.sh b/Test/test.sh
new file mode 100755
index 0000000..19eefab
--- /dev/null
+++ b/Test/test.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -eu
+cd "$(dirname "$0")"
+pwd
+(
+    cd ..
+    dotnet build
+)
+pwd
+mkdir -p ./cache ./config/plugins/jellyfin-smart-playlist
+cp ../bin/Debug/net8.0/jellyfin-smart-playlist.dll ./config/plugins/jellyfin-smart-playlist/
+docker run --rm --user "$(id -u):$(id -g)" \
+    -v ./cache:/cache \
+    -v ./config:/config \
+    -p 8096:8096 \
+    jellyfin/jellyfin
diff --git a/Tests/GlobalUsings.cs b/Tests/GlobalUsings.cs
new file mode 100644
index 0000000..8c927eb
--- /dev/null
+++ b/Tests/GlobalUsings.cs
@@ -0,0 +1 @@
+global using Xunit;
\ No newline at end of file
diff --git a/Tests/Tests.cs b/Tests/Tests.cs
new file mode 100644
index 0000000..d9efa0f
--- /dev/null
+++ b/Tests/Tests.cs
@@ -0,0 +1,68 @@
+using Xunit;
+using Lisp_Environment = Jellyfin.Plugin.SmartPlaylist.Lisp.Environment;
+using Lisp_Boolean = Jellyfin.Plugin.SmartPlaylist.Lisp.Compiler.Boolean;
+using Jellyfin.Plugin.SmartPlaylist.Lisp;
+using Jellyfin.Plugin.SmartPlaylist.Lisp.Compiler;
+
+namespace Tests
+{
+    public class Test {
+        [Fact]
+        public static void StringTokenStreamTest() {
+            StringTokenStream sts = StringTokenStream.generate("(\"some literal string\" def ghj +100 -+300 1)");
+            Assert.Equal(sts.get().value, "(");
+            Assert.Equal(sts.get().value, "\"");
+            Assert.Equal(sts.get().value, "some");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "literal");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "string");
+            Assert.Equal(sts.get().value, "\"");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "def");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "ghj");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "+");
+            Assert.Equal(sts.get().value, "100");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "-");
+            Assert.Equal(sts.get().value, "+");
+            Assert.Equal(sts.get().value, "300");
+            Assert.Equal(sts.get().value, " ");
+            Assert.Equal(sts.get().value, "1");
+            Assert.Equal(sts.get().value, ")");
+            sts.commit();
+            Assert.Equal(sts.available(), 0);
+        }
+
+        [Fact]
+        public static void ParserTest() {
+            string program = "( + 1 ( * 2 3))";
+            StringTokenStream sts = StringTokenStream.generate(program);
+            Parser p = new Parser(sts);
+            Assert.Equal(program, string.Format("{0}", p.parse()));
+        }
+
+        [Fact]
+        public static void EvaluateTest() {
+            Expression p = new Parser(StringTokenStream.generate("(+ 5 (+ 1 2 3))")).parse();
+            var e = Lisp_Environment.create();
+            Entry r = (Entry) e.eval(p);
+            Assert.Equal(((Integer) r.expression).value, 11);
+
+            r = (Entry) Lisp_Environment.create().eval("(> 1 2)");
+            Assert.Equal(((Lisp_Boolean) r.expression).value, false);
+
+            r = (Entry) Lisp_Environment.create().eval("(if (> 1 2) 3 4)");
+            Assert.Equal(((Integer) r.expression).value, 4);
+
+            r = (Entry) Lisp_Environment.create().eval("(begin (define x 1) 4)");
+            Assert.Equal(((Integer) r.expression).value, 4);
+
+
+            r = (Entry) Lisp_Environment.create().eval("(apply + (1 2))");
+            Assert.Equal(((Integer) r.expression).value, 3);
+        }
+    }
+}
diff --git a/Tests/Tests.csproj b/Tests/Tests.csproj
new file mode 100644
index 0000000..c512b7f
--- /dev/null
+++ b/Tests/Tests.csproj
@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+  <ItemGroup>
+        <ProjectReference Include="../Jellyfin.Plugin.SmartPlaylist/jellyfin-smart-playlist.csproj" />
+  </ItemGroup>
+</Project>