add API to get a list of all available models

Author: arunabhcode

src/puter-js/src/modules/AI.js

@@ -37,6 +37,60 @@ class AI{
         this.APIOrigin = APIOrigin;
     }
 
+     /**
+     * Returns a list of available AI models.
+     * @param {string} provider - The provider to filter the models by.
+     * @returns {Object} Object containing lists of available models by provider
+     */
+     async listModels(provider) {
+        const modelsByProvider = {};
+
+        const modelsList = await puter.drivers.call('puter-chat-completion','ai-chat','models');
+
+        if (modelsList && modelsList.result && Array.isArray(modelsList.result)) {
+            modelsList.result.forEach((item) => {
+                if (item.provider && item.id) {
+                    if (provider) {
+                        if (item.provider === provider) { // Only add models for the specified provider
+                            if (!modelsByProvider[item.provider]) {
+                                modelsByProvider[item.provider] = [];
+                            }
+                            modelsByProvider[item.provider].push(item.id);
+                        }
+                    } else { // Add all models
+                        if (!modelsByProvider[item.provider]) {
+                            modelsByProvider[item.provider] = [];
+                        }
+                        modelsByProvider[item.provider].push(item.id);
+                    }
+                }
+            });
+        }
+ 
+        return modelsByProvider;
+    }
+
+    /**
+     * Returns a list of all available AI providers
+     * @returns {Array} Array containing providers
+     */
+    async listModelProviders() {
+        let providers = [];
+        const models = await puter.drivers.call('puter-chat-completion','ai-chat','models');
+
+        if (models && models.result && Array.isArray(models.result)) {
+            providers = new Set(); // Use a Set to store unique providers
+
+            models.result.forEach((item) => {
+            if (item.provider) {
+                providers.add(item.provider);
+            }
+            });
+            providers = Array.from(providers); // Convert Set to an array
+        }
+        return providers;
+    }
+    
     img2txt = async (...args) => {
         let MAX_INPUT_SIZE = 10 * 1024 * 1024;
         let options = {};