feat: 为 rhythm 支持 AIClient 的功能。

src/main/java/org/b3log/symphony/ai/AIClient.java

@@ -0,0 +1,120 @@
+/*
+ * Rhythm - A modern community (forum/BBS/SNS/blog) platform written in Java.
+ * Modified version from Symphony, Thanks Symphony :)
+ * Copyright (C) 2012-present, b3log.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.b3log.symphony.ai;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.http.HttpClient;
+import java.net.http.HttpResponse;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
+
+import org.json.JSONObject;
+import org.json.JSONException;
+
+public class AIClient {
+	private HttpClient client;
+
+	public AIClient(HttpClient client) {
+		this.client = client;
+	}
+
+	private class SSE implements Supplier<JSONObject> {
+		private BufferedReader reader;
+		private boolean closed = false;
+		private static String DONE = "data: [DONE]";
+
+		public SSE(InputStream inputStream) {
+			this.reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
+		}
+
+		@Override
+		public JSONObject get() {
+				try {
+					String line;
+					do {
+						line = reader.readLine();
+						if (line == null || line.equals(SSE.DONE)) {
+							this.reader.close();
+							this.closed = true;
+
+							return null;
+						}
+					} while (line.isBlank());
+
+
+					return new JSONObject(line.substring(6));
+				} catch (IOException | JSONException e) {
+					if (!this.closed) {
+						try {
+							this.reader.close();
+						} catch (IOException ignore) {}
+					}
+					this.closed = true;
+
+					return null;
+				}
+		}
+	}
+
+	private class Text implements Supplier<JSONObject> {
+		private BufferedReader reader;
+		private boolean closed = false;
+
+		public Text(InputStream inputStream) {
+			this.reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
+		}
+
+		@Override
+		public JSONObject get() {
+			try {
+				var line = reader.readAllAsString();
+				this.reader.close();
+				this.closed = true;
+				if (line == null) {
+					return null;
+				}
+
+				return new JSONObject(line);
+			} catch (IOException | JSONException e) {
+				if (!this.closed) {
+					try {
+						this.reader.close();
+					} catch (IOException ignore) {}
+				}
+				this.closed = true;
+
+				return null;
+			}
+		}
+	}
+
+	public Stream<JSONObject> send(Provider provider) throws IOException, InterruptedException, JSONException {
+		var response = this.client.send(provider.getHttpRequest(), HttpResponse.BodyHandlers.ofInputStream());
+		var contentType = response.headers().firstValue("Content-Type").orElse("");
+		var handler = contentType.contains("event-stream")
+			? new SSE(response.body())
+			: new Text(response.body());
+		return Stream.generate(handler).takeWhile(Objects::nonNull);
+	}
+}

src/main/java/org/b3log/symphony/ai/Model.java

@@ -0,0 +1,28 @@
+/*
+ * Rhythm - A modern community (forum/BBS/SNS/blog) platform written in Java.
+ * Modified version from Symphony, Thanks Symphony :)
+ * Copyright (C) 2012-present, b3log.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.b3log.symphony.ai;
+
+public interface Model {
+	String getName();
+
+	sealed interface Supported permits Supported.Text, Supported.Image {
+		non-sealed interface Text extends Model, Supported {}
+		non-sealed interface Image extends Model, Supported {}
+	}
+}

src/main/java/org/b3log/symphony/ai/ModelNotSupportException.java

@@ -0,0 +1,34 @@
+/*
+ * Rhythm - A modern community (forum/BBS/SNS/blog) platform written in Java.
+ * Modified version from Symphony, Thanks Symphony :)
+ * Copyright (C) 2012-present, b3log.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.b3log.symphony.ai;
+
+class ModelNotSupportException extends Exception {
+	private String type;
+	private Model model;
+
+	ModelNotSupportException(Model model, String type) {
+		this.type = type;
+		this.model = model;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("Model %s not support this %s content type", this.model.getName(), type);
+	}
+}