feat: allow to initialize empty playlist file.

Jellyfin.Plugin.SmartPlaylist/Lisp/Expression.cs

@@ -29,6 +29,10 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
         E Equals(T other);
     }
 
+    interface IInner {
+        public object Inner();
+    }
+
     public abstract class Expression: IComparable<Expression, bool> {
         public override abstract string? ToString();
         public abstract override int GetHashCode();
@@ -48,7 +52,7 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
     }
 
     public abstract class Atom : Expression {}
-    public class Scalar<V> : Atom where V : notnull {
+    public class Scalar<V> : Atom, IInner where V : notnull {
         protected V _value;
         public Scalar(V value) {
             _value = value;
@@ -68,6 +72,9 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
         public V Value() {
             return _value;
         }
+        public object Inner() {
+            return _value;
+        }
     }
     public class Symbol : Atom {
         private string _name;
@@ -276,18 +283,24 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             Executor new_e = new Executor(new SubEnvironment(e.environment), e.builtins, e.builtinsLater);
             var _params = _parameters.Select(x => x.Name()).ToArray();
             var idx_rest = -1;
+
+            IList<(string, Expression)> name_args = new List<(string, Expression)>();
             for (var i = 0; i < _parameters.Count(); i++) {
                 var name = _params[i];
                 if (name.Equals(".")) {
                     idx_rest = i + 1;
                     break;
                 }
-                new_e.environment.Set(name, _eval(e, args[i]));
+                name_args.Add((name, _eval(e, args[i])));
             }
             if (idx_rest > 0) {
-                new_e.environment.Set(_params[idx_rest], Cons.FromList(args.Skip(idx_rest - 1).Select(x => _eval(e, x))));
+                name_args.Add((_params[idx_rest], Cons.FromList(args.Skip(idx_rest - 1).Select(x => _eval(e, x)))));
             }
-            return new_e.eval(_body);
+            foreach (var na in name_args) {
+                new_e.environment.Set(na.Item1, na.Item2);
+            }
+            var r = new_e.eval(_body);
+            return r;
         }
     }
 

Jellyfin.Plugin.SmartPlaylist/Lisp/Interpreter.cs

@@ -39,15 +39,13 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
     public class DefaultEnvironment: Environment {
         public DefaultEnvironment() {
             var e = new Executor();
-            this["if"] = e.eval("(lambda* (condition a b) ( cond ((eval condition) (eval a)) (t (eval b))))");
             this["null"] = new Symbol("not");
             this["list"] = e.eval("(lambda (. args) args)");
             this["find"] = e.eval("(lambda (item list_) (if (null list_) nil (if (= item (car list_)) (car list_) (find item (cdr list_)))))");
             this["map"] = e.eval("(lambda (fc l) (if (null l) nil (cons (fc (car l)) (map fc (cdr l)))))");
-            this["and"] = e.eval("(lambda (l) (if (null l) t (if (car l) (and (cdr l)) nil)))");
-            this["or"] = e.eval("(lambda (l) (if (null l) nil (if (car l) t (or (cdr l)))))");
-            this["any"] = e.eval("(lambda (fc l) (or (map fc l)))");
-            this["all"] = e.eval("(lambda (fc l) (and (map fc l)))");
+            this["fold"] = e.eval("(lambda (fc i l) (if (null l) i (fold fc (fc i (car l)) (cdr l))))");
+            this["any"] = e.eval("(lambda (fc l) (apply or (map fc l)))");
+            this["all"] = e.eval("(lambda (fc l) (apply and (map fc l)))");
         }
     }
 
@@ -104,7 +102,10 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             this[">"] = (x) => _cmp((Integer a, Integer b) => a > b, x);
             this[">="] = (x) => _cmp((Integer a, Integer b) => a >= b, x);
             this["!="] = (x) => _cmp((Integer a, Integer b) => a != b, x);
-            this["not"] = (x) => (x.First() == Boolean.FALSE) ? Boolean.TRUE : Boolean.FALSE;
+            this["not"] = (x) => {
+                return (x.First() == Boolean.FALSE) ? Boolean.TRUE : Boolean.FALSE;
+            };
+
 
             this["haskeys"] = _haskeys;
             this["getitems"] = _getitems;
@@ -160,7 +161,7 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             return Boolean.TRUE;
         }
         private static Expression _getitems(IEnumerable<Expression> args) {
-            Object o = (Object) args.First();
+            Object o = new Object(((IInner) args.First()).Inner());
             IList<Expression> r = new List<Expression>();
             foreach (var e in args.Skip(1)) {
                 String s = (String) e;
@@ -180,7 +181,7 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
         }
 
         private static Expression _invoke(IEnumerable<Expression> args) {
-            Object o = (Object) args.First();
+            Object o = new Object(((IInner) args.First()).Inner());
             String s = (String) args.Skip(1).First();
             IEnumerable<Expression> l;
             if (args.Skip(2).First() is Boolean lb && lb == Boolean.FALSE) {
@@ -190,25 +191,31 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             } else {
                 throw new ApplicationException($"Expected a list of arguments, got {args.Skip(2).First()}");
             }
-
-            IList<Expression> r = new List<Expression>();
-            MethodInfo? mi = o.Value().GetType().GetMethod(s.Value());
-            if (mi == null) {
-                throw new ApplicationException($"{o.Value()} has not method {s.Value()}");
-            }
-            object?[]? l_ = l.Select<Expression, object?>(x => {
+            object[]? l_ = l.Select<Expression, object>(x => {
                 switch (x) {
                     case Integer s:
                         return s.Value();
                     case Boolean b:
                         return b.Value();
+                    case String s:
+                        return s.Value();
                     case Object o:
                         return o.Value();
                     case Cons c:
                         return c.ToList().ToList();
                 }
-                return null;
+                throw new ApplicationException($"Unhandled value {x} (type {x.GetType()})");
             }).ToArray();
+            Type[] l_types = l_.Select( x => {
+                    return x.GetType();
+            }).ToArray();
+
+            IList<Expression> r = new List<Expression>();
+            MethodInfo? mi = o.Value().GetType().GetMethod(s.Value(), l_types);
+            if (mi == null) {
+                throw new ApplicationException($"{o.Value()} has not method {s.Value()}");
+            }
+
             return Object.FromBase(mi.Invoke(o.Value(), l_));
         }
     }
@@ -218,11 +225,36 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             this["quote"] = _quote;
             this["eval"] = _eval;
             this["cond"] = _cond;
+            this["if"] = _if;
             this["define"] = _define;
             this["let"] = _let;
             this["let*"] = _let_star;
             this["lambda"] = _lambda;
             this["lambda*"] = _lambda_star;
+            this["apply"] = _apply;
+
+            this["and"] = (e, x) => {
+                Expression? r = null;
+                foreach (var xi in x) {
+                    r = e.eval(xi);
+                    if (r == Boolean.FALSE) {
+                        return r;
+                    }
+                }
+                if (r is null) {
+                    return Boolean.FALSE;
+                }
+                return r;
+            };
+            this["or"] = (e, x) => {
+                foreach (var xi in x) {
+                    var r = e.eval(xi);
+                    if (r != Boolean.FALSE) {
+                        return r;
+                    }
+                }
+                return Boolean.FALSE;
+            };
         }
         private static Expression _quote(Executor e, IEnumerable<Expression> args) {
             return args.First();
@@ -243,6 +275,12 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             }
             return Boolean.FALSE;
         }
+        private static Expression _if(Executor e, IEnumerable<Expression> args) {
+            if (e.eval(args.First()).Equals(Boolean.FALSE)) {
+                return e.eval(args.Skip(2).First());
+            }
+            return e.eval(args.Skip(1).First());
+        }
         private static Expression _define(Executor e, IEnumerable<Expression> args) {
             Symbol refname = (Symbol) args.First();
             e.environment.Parent(true).Set(refname.Name(), args.Skip(1).Select(x => e.eval(x)).First());
@@ -269,7 +307,7 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
                 }
                 Symbol refname = (Symbol) pair_cons.Item1;
                 Expression exp_ = ((Cons) pair_cons.Item2).Item1;
-                vars.Add((refname, exp_));
+                vars.Add((refname, e.eval(exp_)));
             }
             foreach (var pair in vars) {
                 new_e.environment.Set(pair.Item1.Name(), pair.Item2);
@@ -294,6 +332,9 @@ namespace Jellyfin.Plugin.SmartPlaylist.Lisp {
             }
             return new Procedure(proc_args, args.Skip(1).First(), false);
         }
+        private static Expression _apply(Executor e, IEnumerable<Expression> args) {
+            return e.eval(new Cons(args.First(), e.eval(args.Skip(1).First())));
+        }
     }
 
     public class Executor {

Jellyfin.Plugin.SmartPlaylist/PluginConfiguration.cs

@@ -2,8 +2,19 @@ using MediaBrowser.Model.Plugins;
 
 namespace Jellyfin.Plugin.SmartPlaylist {
     public class PluginConfiguration : BasePluginConfiguration {
-        public PluginConfiguration(
-        ) {
+        public PluginConfiguration() {
+            InitialProgram = """
+            (begin
+              (define lower (lambda (s) (invoke s "ToLower" nil)))
+              (define is-genre (lambda (g g-list) (any (lambda (x) (invoke (lower x) "Contains" (list (lower g)))) g-list)))
+              (define is-genre-exact (lambda (g g-list) (find g g-list)))
+              (define genre-list (lambda nil (let (_g (getitems item "Genres")) (if (null _g) nil (car _g)))))
+              (define is-favorite (lambda nil (invoke item "IsFavoriteOrLiked" (list user)))))
+
+
+              (define is-favourite is-favorite)
+            """;
         }
+        public string InitialProgram { get; set; }
     }
 }

Jellyfin.Plugin.SmartPlaylist/ScheduledTasks/GeneratePlaylist.cs

@@ -98,6 +98,11 @@ namespace Jellyfin.Plugin.SmartPlaylist.ScheduledTasks {
             Expression expression = new Parser(StringTokenStream.generate(smartPlaylist.Program)).parse();
             Executor executor = new Executor(new DefaultEnvironment());
             executor.environment.Set("user", new Lisp_Object(user));
+            if (Plugin.Instance is not null) {
+                executor.eval(Plugin.Instance.Configuration.InitialProgram);
+            } else {
+                throw new ApplicationException("Plugin Instance is not yet initialized");
+            }
             foreach (var i in items) {
                 executor.environment.Set("item", new Lisp_Object(i));
                 var r = executor.eval(expression);

Jellyfin.Plugin.SmartPlaylist/SmartPlaylistDto.cs

@@ -41,7 +41,7 @@ namespace Jellyfin.Plugin.SmartPlaylist {
 
     [Serializable]
     public class SmartPlaylistDto : ISerializable {
-        private static string DEFAULT_PROGRAM = "(begin (invoke item 'IsFavoriteOrLiked' (user)))";
+        private static string DEFAULT_PROGRAM = "(begin (invoke item \"IsFavoriteOrLiked\" (list user)))";
         public SmartPlaylistId Id { get; set; }
         public SmartPlaylistLinkDto[] Playlists { get; set; }
         public string Name { get; set; }

Jellyfin.Plugin.SmartPlaylist/SmartPlaylistFileSystem.cs

@@ -16,13 +16,21 @@ namespace Jellyfin.Plugin.SmartPlaylist {
         }
         public string StoragePath { get; }
         public string GetSmartPlaylistFilePath(SmartPlaylistId smartPlaylistId) {
-            return Path.Combine(StoragePath, $"{smartPlaylistId}.json");
+            return Path.Combine(StoragePath, $"{smartPlaylistId}.yaml");
         }
         public string FindSmartPlaylistFilePath(SmartPlaylistId smartPlaylistId) {
-            return Directory.GetFiles(StoragePath, $"{smartPlaylistId}.json", SearchOption.AllDirectories).First();
+            return Directory.GetFiles(StoragePath, $"{smartPlaylistId}.yaml", SearchOption.AllDirectories).Concat(
+                Directory.GetFiles(StoragePath, $"{smartPlaylistId}.yml", SearchOption.AllDirectories)
+            ).Concat(
+                Directory.GetFiles(StoragePath, $"{smartPlaylistId}.json", SearchOption.AllDirectories)
+            ).First();
         }
         public string[] FindAllSmartPlaylistFilePaths() {
-            return Directory.GetFiles(StoragePath, "*.json", SearchOption.AllDirectories);
+            return Directory.GetFiles(StoragePath, "*.yaml", SearchOption.AllDirectories).Concat(
+                Directory.GetFiles(StoragePath, "*.yml", SearchOption.AllDirectories)
+            ).Concat(
+                Directory.GetFiles(StoragePath, "*.json", SearchOption.AllDirectories)
+            ).ToArray();
         }
     }
 }

Jellyfin.Plugin.SmartPlaylist/Store.cs

@@ -1,4 +1,4 @@
-using System.Text.Json;
+using YamlDotNet.Serialization;
 
 namespace Jellyfin.Plugin.SmartPlaylist {
     public interface IStore {
@@ -14,14 +14,21 @@ namespace Jellyfin.Plugin.SmartPlaylist {
             _fileSystem = fileSystem;
         }
         private async Task<SmartPlaylistDto> LoadPlaylistAsync(string filename) {
-            await using var r = File.OpenRead(filename);
-            var dto = (await JsonSerializer.DeserializeAsync<SmartPlaylistDto>(r).ConfigureAwait(false));
-            if (dto == null) {
+            var r = File.ReadAllText(filename);
+            if (r.Equals("")) {
+                r = "{}";
+            }
+            var dto = new DeserializerBuilder().Build().Deserialize<SmartPlaylistDto>(r);
+            if (dto == null)
+            {
                 throw new ApplicationException("");
             }
-            if (dto.Id == Path.GetFileNameWithoutExtension(filename)) {
+            if (dto.Id != Path.GetFileNameWithoutExtension(filename)) {
                 dto.Id = Path.GetFileNameWithoutExtension(filename);
             }
+            if (dto.Name != Path.GetFileNameWithoutExtension(filename)) {
+                dto.Name = Path.GetFileNameWithoutExtension(filename);
+            }
             if (dto.Filename != filename) {
                 dto.Filename = filename;
             }
@@ -38,8 +45,8 @@ namespace Jellyfin.Plugin.SmartPlaylist {
         }
         public async Task SaveSmartPlaylistAsync(SmartPlaylistDto smartPlaylist) {
             string filename = _fileSystem.GetSmartPlaylistFilePath(smartPlaylist.Id);
-            await using var w = File.Create(filename);
-            await JsonSerializer.SerializeAsync(w, smartPlaylist).ConfigureAwait(false);
+            var text = new SerializerBuilder().Build().Serialize(smartPlaylist);
+            File.WriteAllText(filename, text);
         }
         private void DeleteSmartPlaylistById(SmartPlaylistId smartPlaylistId) {
             try {

Jellyfin.Plugin.SmartPlaylist/build.yaml

@@ -12,5 +12,7 @@ description: |
 category: "General"
 artifacts:
   - jellyfin-smart-playlist.dll
+  - YamlDotNet.dll
 changelog: |
+  - Switch to yaml loading.
   - Initial Alpha release.

Jellyfin.Plugin.SmartPlaylist/configPage.html

@@ -5,32 +5,14 @@
     <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 id="SmartPlaylistConfigPage" 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>
+                <form id="SmartPlaylistConfigForm">
                     <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>
+                        <label class="inputLabel inputLabelUnfocused" for="InitialProgram">Initial Program</label>
+                        <div class="fieldDescription">A program which can set up the environment</div>
+                        <input id="InitialProgram" name="InitialProgram" type="text" is="emby-input" />
                     </div>
                     <div>
                         <button is="emby-button" type="submit" class="raised button-submit block emby-button">
@@ -41,31 +23,25 @@
             </div>
         </div>
         <script type="text/javascript">
-            var TemplateConfig = {
+            var SmartPlaylistConfig = {
                 pluginUniqueId: 'dd2326e3-4d3e-4bfc-80e6-28502c1131df'
             };
 
-            document.querySelector('#TemplateConfigPage')
+            document.querySelector('#SmartPlaylistConfigPage')
                 .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;
+                    ApiClient.getPluginConfiguration(SmartPlaylistConfig.pluginUniqueId).then(function (config) {
+                        document.querySelector('#InitialProgram').value = config.InitialProgram;
                         Dashboard.hideLoadingMsg();
                     });
                 });
 
-            document.querySelector('#TemplateConfigForm')
+            document.querySelector('#SmartPlaylistConfigForm')
                 .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) {
+                ApiClient.getPluginConfiguration(SmartPlaylistConfig.pluginUniqueId).then(function (config) {
+                    config.InitialProgram = document.querySelector('#InitialProgram').value;
+                    ApiClient.updatePluginConfiguration(SmartPlaylistConfig.pluginUniqueId, config).then(function (result) {
                         Dashboard.processPluginConfigurationUpdateResult(result);
                     });
                 });

Jellyfin.Plugin.SmartPlaylist/jellyfin-smart-playlist.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
-    <RootNamespace>jellyfin_smart_playlist</RootNamespace>
+    <RootNamespace>Jellyfin.Plugin.SmartPlaylist</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <Version>0.1.1.0</Version>
@@ -11,6 +11,12 @@
   <ItemGroup>
     <PackageReference Include="Jellyfin.Controller" Version="10.10.0" />
     <PackageReference Include="Jellyfin.Model" Version="10.10.0" />
+    <PackageReference Include="YamlDotNet" Version="16.1.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Remove="configPage.html"/>
+    <EmbeddedResource Include="configPage.html"/>
   </ItemGroup>
 
 </Project>

Tests/Tests.cs

@@ -192,7 +192,6 @@ namespace Tests
                     (define null (lambda* (x) (cond ((eval x) nil) (t t))))
                     (null (quote (1 2))))
             """).ToString());
-
         }
         [Fact]
         public static void ObjectTest() {
@@ -212,18 +211,23 @@ namespace Tests
             Executor e = new Executor(new DefaultEnvironment());
             Assert.Equal("1", e.eval("(if nil 0 1)").ToString());
             Assert.Equal("0", e.eval("(if t 0 1)").ToString());
+            Assert.Equal("5", e.eval("(if t (if t 5 nil) nil)").ToString());
+            Assert.Equal("nil", e.eval("(if t (if nil 5 nil) nil)").ToString());
             Assert.Equal("(1 2 3)", e.eval("(list 1 2 3)").ToString());
             Assert.Equal("3", e.eval("(find 3 (list 1 2 3 4))").ToString());
             Assert.Equal("nil", e.eval("(find 0 (list 1 2 3 4))").ToString());
             Assert.Equal("(2 4 6)", e.eval("(map (lambda (x) (* x 2)) (quote (1 2 3)))").ToString());
-            Assert.Equal("nil", e.eval("(and (quote (1 2 3 nil)))").ToString());
-            Assert.Equal("t", e.eval("(and (quote (1 2 3 4)))").ToString());
-            Assert.Equal("t", e.eval("(or (quote (nil nil 1 nil)))").ToString());
-            Assert.Equal("nil", e.eval("(or (quote (nil nil nil nil)))").ToString());
+            Assert.Equal("nil", e.eval("(and 1 2 3 nil)").ToString());
+            Assert.Equal("t", e.eval("(and t t t t)").ToString());
+            Assert.Equal("t", e.eval("(or nil nil t nil)").ToString());
+            Assert.Equal("nil", e.eval("(or nil nil nil nil)").ToString());
             Assert.Equal("t", e.eval("(any (lambda (x) (= x 2)) (list 1 2 3 4 5 6))").ToString());
             Assert.Equal("nil", e.eval("(any (lambda (x) (= x 2)) (list 1 3 4 5 6))").ToString());
+            Assert.Equal("nil", e.eval("(any (lambda (x) (= x 2)) nil)").ToString());
             Assert.Equal("t", e.eval("(all (lambda (x) (= 1 (% x 2))) (list 1 3 5))").ToString());
             Assert.Equal("nil", e.eval("(all (lambda (x) (= 1 (% x 2))) (list 1 3 4 5))").ToString());
+            Assert.Equal("nil", e.eval("(all (lambda (x) (= x 2)) nil)").ToString());
+            Assert.Equal("10", e.eval("(fold (lambda (a b) (+ a b)) 0 (list 1 2 3 4))").ToString());
         }
     }
 }