[chatgpt] Add support for LocalAI and other compatible services (#15385)

* Add support for LocalAI and other compatible services

--------

Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/org.openhab.binding.chatgpt/README.md

@@ -15,8 +15,12 @@ The `account` thing requires a single configuration parameter, which is the API
 API keys can be created and managed under <https://platform.openai.com/account/api-keys>.
 
 | Name            | Type    | Description                                               | Default                                    | Required | Advanced |
-|-----------------|---------|-----------------------------------------|---------|----------|----------|
+|-----------------|---------|-----------------------------------------------------------|--------------------------------------------|----------|----------|
 | apiKey          | text    | The API key to be used for the requests                   | N/A                                        | yes      | no       |
+| apiUrl          | text    | The server API where to reach the AI service              | https://api.openai.com/v1/chat/completions | no       | yes      |
+| modelUrl        | text    | The model url where to retrieve the available models from | https://api.openai.com/v1/models           | no       | yes      |
+
+The advanced parameters `apiUrl` and `modelUrl` can be used, if any other ChatGPT-compatible service is used, e.g. a local installation of [LocalAI](https://github.com/go-skynet/LocalAI).
 
 ## Channels
 

bundles/org.openhab.binding.chatgpt/src/main/java/org/openhab/binding/chatgpt/internal/ChatGPTBindingConstants.java

@@ -31,7 +31,4 @@ public class ChatGPTBindingConstants {
 
     // List of all Channel ids
     public static final String CHANNEL_CHAT = "chat";
-
-    public static final String OPENAI_API_URL = "https://api.openai.com/v1/chat/completions";
-    public static final String OPENAI_MODELS_URL = "https://api.openai.com/v1/models";
 }

bundles/org.openhab.binding.chatgpt/src/main/java/org/openhab/binding/chatgpt/internal/ChatGPTConfiguration.java

@@ -23,4 +23,6 @@ import org.eclipse.jdt.annotation.NonNullByDefault;
 public class ChatGPTConfiguration {
 
     public String apiKey = "";
+    public String apiUrl = "https://api.openai.com/v1/chat/completions";
+    public String modelUrl = "https://api.openai.com/v1/models";
 }

bundles/org.openhab.binding.chatgpt/src/main/java/org/openhab/binding/chatgpt/internal/ChatGPTHandler.java

@@ -12,8 +12,6 @@
  */
 package org.openhab.binding.chatgpt.internal;
 
-import static org.openhab.binding.chatgpt.internal.ChatGPTBindingConstants.*;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -63,6 +61,9 @@ public class ChatGPTHandler extends BaseThingHandler {
     private Gson gson = new Gson();
 
     private String apiKey = "";
+    private String apiUrl = "";
+    private String modelUrl = "";
+
     private String lastPrompt = "";
 
     private List<String> models = List.of();
@@ -123,7 +124,7 @@ public class ChatGPTHandler extends BaseThingHandler {
         root.add("messages", messages);
 
         String queryJson = gson.toJson(root);
-        Request request = httpClient.newRequest(OPENAI_API_URL).method(HttpMethod.POST)
+        Request request = httpClient.newRequest(apiUrl).method(HttpMethod.POST)
                 .header("Content-Type", "application/json").header("Authorization", "Bearer " + apiKey)
                 .content(new StringContentProvider(queryJson));
         logger.trace("Query '{}'", queryJson);
@@ -158,12 +159,15 @@ public class ChatGPTHandler extends BaseThingHandler {
         }
 
         this.apiKey = apiKey;
+        this.apiUrl = config.apiUrl;
+        this.modelUrl = config.modelUrl;
+
         updateStatus(ThingStatus.UNKNOWN);
 
         scheduler.execute(() -> {
             try {
-                Request request = httpClient.newRequest(OPENAI_MODELS_URL).method(HttpMethod.GET)
+                Request request = httpClient.newRequest(modelUrl).method(HttpMethod.GET).header("Authorization",
-                        .header("Authorization", "Bearer " + apiKey);
+                        "Bearer " + apiKey);
                 ContentResponse response = request.send();
                 if (response.getStatus() == 200) {
                     updateStatus(ThingStatus.ONLINE);

bundles/org.openhab.binding.chatgpt/src/main/resources/OH-INF/i18n/chatgpt.properties

@@ -12,6 +12,10 @@ thing-type.chatgpt.account.description = Account at OpenAI that is used for acce
 
 thing-type.config.chatgpt.account.apiKey.label = API Key
 thing-type.config.chatgpt.account.apiKey.description = API key to access the account
+thing-type.config.chatgpt.account.apiUrl.label = API URL
+thing-type.config.chatgpt.account.apiUrl.description = The server API where to reach the AI service.
+thing-type.config.chatgpt.account.modelUrl.label = Model URL
+thing-type.config.chatgpt.account.modelUrl.description = The model url where to retrieve the available models from.
 
 # channel types
 
@@ -29,7 +33,7 @@ channel-type.config.chatgpt.chat.systemMessage.description = The system message
 channel-type.config.chatgpt.chat.temperature.label = Temperature
 channel-type.config.chatgpt.chat.temperature.description = Higher values like 0.8 will make the output more random, while lower values like 0.2 will make it more focused and deterministic.
 
-# Status messages
+# status messages
 
 offline.configuration-error = No API key configured
 offline.communication-error = Could not connect to OpenAI API

bundles/org.openhab.binding.chatgpt/src/main/resources/OH-INF/thing/thing-types.xml

@@ -19,6 +19,26 @@
 				<label>API Key</label>
 				<description>API key to access the account</description>
 			</parameter>
+			<parameter name="apiUrl" type="text" required="false">
+				<label>API URL</label>
+				<description>The server API where to reach the AI service.</description>
+				<default>https://api.openai.com/v1/chat/completions</default>
+				<advanced>true</advanced>
+				<options>
+					<option value="https://api.openai.com/v1/chat/completions">https://api.openai.com/v1/chat/completions</option>
+				</options>
+				<limitToOptions>false</limitToOptions>
+			</parameter>
+			<parameter name="modelUrl" type="text" required="false">
+				<label>Model URL</label>
+				<description>The model url where to retrieve the available models from.</description>
+				<default>https://api.openai.com/v1/models</default>
+				<advanced>true</advanced>
+				<options>
+					<option value="https://api.openai.com/v1/models">https://api.openai.com/v1/models</option>
+				</options>
+				<limitToOptions>false</limitToOptions>
+			</parameter>
 		</config-description>
 	</thing-type>