TexImage caching implemented

Builder/IISMainHandler/build.txt

@@ -1 +1 @@
-1219
+1225

Common/BBCodes/helpers/TexProcessor.cs

@@ -9,10 +9,7 @@ namespace FLocal.Common.BBCodes.helpers {
 	static class TexProcessor {
 
 		public static dataobjects.Upload getCompiled(string tex) {
-			dataobjects.User uploader = dataobjects.User.LoadByName("Mr. TeX compiler");
-			using(Stream stream = Compiler.GetPngStream(tex)) {
-				return UploadManager.SafeUploadFile(stream, "tex.png", uploader);
-			}
+			return dataobjects.TexImage.Save(tex).upload;
 		}
 
 	}

Common/Common.csproj

@@ -111,6 +111,7 @@
     <Compile Include="dataobjects\Revision.cs" />
     <Compile Include="dataobjects\Session.cs" />
     <Compile Include="dataobjects\Skin.cs" />
+    <Compile Include="dataobjects\TexImage.cs" />
     <Compile Include="dataobjects\Thread.cs" />
     <Compile Include="dataobjects\Upload.cs" />
     <Compile Include="dataobjects\User.cs" />

Common/TableManager.cs

@@ -30,6 +30,7 @@ namespace FLocal.Common {
 			dataobjects.Revision.TableSpec.instance,
 			dataobjects.Session.TableSpec.instance,
 			dataobjects.Skin.TableSpec.instance,
+			dataobjects.TexImage.TableSpec.instance,
 			dataobjects.Thread.TableSpec.instance,
 			dataobjects.Upload.TableSpec.instance,
 			dataobjects.User.TableSpec.instance,

Common/actions/ChangeSet.cs

@@ -39,6 +39,7 @@ namespace FLocal.Common.actions {
 						dataobjects.Punishment.TableSpec.TABLE,
 						dataobjects.PunishmentTransfer.TableSpec.TABLE,
 						dataobjects.PunishmentLayerChange.TableSpec.TABLE,
+						dataobjects.TexImage.TableSpec.TABLE,
 						dataobjects.Session.TableSpec.TABLE,
 					}
 				);

Common/dataobjects/TexImage.cs

@@ -0,0 +1,108 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Xml.Linq;
+using FLocal.Core;
+using FLocal.Core.DB;
+using FLocal.Core.DB.conditions;
+using FLocal.Common.actions;
+using FLocal.TexCompiler;
+
+namespace FLocal.Common.dataobjects {
+	public class TexImage : SqlObject<TexImage> {
+
+		public class TableSpec : ISqlObjectTableSpec {
+			public const string TABLE = "TexImages";
+			public const string FIELD_ID = "Id";
+			public const string FIELD_HASH = "MD5";
+			public const string FIELD_TEXT = "Text";
+			public const string FIELD_UPLOADID = "UploadId";
+			public static readonly TableSpec instance = new TableSpec();
+			public string name { get { return TABLE; } }
+			public string idName { get { return FIELD_ID; } }
+			public void refreshSqlObject(int id) { Refresh(id); }
+		}
+
+		protected override ISqlObjectTableSpec table { get { return TableSpec.instance; } }
+
+		private string _hash;
+		public string hash {
+			get {
+				this.LoadIfNotLoaded();
+				return this._hash;
+			}
+		}
+
+		private string _text;
+		public string text {
+			get {
+				this.LoadIfNotLoaded();
+				return this._text;
+			}
+		}
+
+		private int _uploadId;
+		public int uploadId {
+			get {
+				this.LoadIfNotLoaded();
+				return this._uploadId;
+			}
+		}
+		public Upload upload {
+			get {
+				return Upload.LoadById(this.uploadId);
+			}
+		}
+
+		protected override void doFromHash(Dictionary<string, string> data) {
+			this._hash = data[TableSpec.FIELD_HASH];
+			this._text = data[TableSpec.FIELD_TEXT];
+			this._uploadId = int.Parse(data[TableSpec.FIELD_UPLOADID]);
+		}
+
+		public XElement exportToXml(UserContext context) {
+			return new XElement("texImage",
+				new XElement("id", this.id),
+				new XElement("hash", this.hash),
+				new XElement("text", this.text),
+				this.upload.exportToXml(context)
+			);
+		}
+
+		public static TexImage Save(string text) {
+			string hash = Util.md5(text);
+			try {
+				return TexImage.LoadById(
+					int.Parse(
+						Config.instance.mainConnection.LoadIdByField(
+							TableSpec.instance.getColumnSpec(TableSpec.FIELD_HASH),
+							hash
+						)
+					)
+				);
+			} catch(NotFoundInDBException) {
+			}
+
+			User uploader = User.LoadByName("Mr. TeX compiler");
+			Upload file = UploadManager.SafeUploadFile(Compiler.GetPngStream(text), "tex-" + hash + ".png", uploader);
+			InsertOrUpdateChange change = new InsertOrUpdateChange(
+				TableSpec.instance,
+				new Dictionary<string,AbstractFieldValue> {
+					{ TableSpec.FIELD_HASH, new ScalarFieldValue(hash) },
+					{ TableSpec.FIELD_TEXT, new ScalarFieldValue(text) },
+					{ TableSpec.FIELD_UPLOADID, new ScalarFieldValue(file.id.ToString()) },
+				},
+				new Dictionary<string,AbstractFieldValue>(),
+				new ComparisonCondition(
+					TableSpec.instance.getColumnSpec(TableSpec.FIELD_HASH),
+					ComparisonType.EQUAL,
+					hash
+				)
+			);
+			ChangeSetUtil.ApplyChanges(change);
+			return TexImage.LoadById(change.getId().Value);
+		}
+
+	}
+}

TexCompiler/Compiler.cs

@@ -23,7 +23,7 @@ namespace FLocal.TexCompiler {
 			}
 		}
 
-		public static Stream GetPngStream(string tex) {
+		public static MemoryStream GetPngStream(string tex) {
 
 			Dictionary<string, string> postData = new Dictionary<string,string> {
 				{ "dev", "png16m" },