add function to switch between downloaded models

preloader/index.js

@@ -5,7 +5,8 @@ const {
     abortCompletion,
     setClient, 
     downloadModel,
-    updateModelSettings
+    updateModelSettings,
+    formator
 } = require("./node-llama-cpp-preloader.js")
 
 const {
@@ -14,7 +15,7 @@ const {
 
 contextBridge.exposeInMainWorld('node-llama-cpp', {
     loadModel, chatCompletions, updateModelSettings,
-    abortCompletion, setClient, downloadModel
+    abortCompletion, setClient, downloadModel, formator
 })
 
 contextBridge.exposeInMainWorld('file-handler', {

preloader/node-llama-cpp-preloader.js

@@ -40,9 +40,18 @@ async function loadModel(model_name = '') {
     })
 }
 
+
+
+/**
+ * @typedef Message
+ * @property {"user"|"assistant"|"system"} role Sender
+ * @property {String} content Message content
+ */
+
 /**
  * Set the session, basically reset the history and return a static string 'fake-client'
  * @param {String} client a fake client, everything using the same client and switch between clients just simply reset the chat history
+ * @param {Message[]} history the history to load
  * @returns {String}
  */
 async function setClient(client, history = []) {
@@ -66,20 +75,20 @@ async function setClient(client, history = []) {
  * @param {any} message The latest user message, either string or any can be converted to string. If is array in the format of {content:String}, it will retrieve the last content
  * @returns {String} the retrived message
  */
-function findMessageText(message) {
-    if(typeof message === "string") return message;
-    else if(typeof message === "object") {
-        if(Array.isArray(message)) {
-            while(message.length) {
-                message = message.pop();
-                if(typeof message === 'object' && message.role && message.role === 'user' && message.content) {
-                    return message.content;
-                }
-            }
-        }
-    }
-    return `${message}`
-}
+// function findMessageText(message) {
+//     if(typeof message === "string") return message;
+//     else if(typeof message === "object") {
+//         if(Array.isArray(message)) {
+//             while(message.length) {
+//                 message = message.pop();
+//                 if(typeof message === 'object' && message.role && message.role === 'user' && message.content) {
+//                     return message.content;
+//                 }
+//             }
+//         }
+//     }
+//     return `${message}`
+// }
 
 let model_settings = {};
 function updateModelSettings(settings) {
@@ -99,15 +108,12 @@ function updateModelSettings(settings) {
  * @returns {Promise<String>} the response text
  */
 async function chatCompletions(latest_message, cb=null) {
-    const {max_tokens, top_p, temperature, llama_reset_everytime} = model_settings;
+    const {max_tokens, top_p, temperature} = model_settings;
     if(!llama_session) {
         cb && cb('> **ERROR: MODEL NOT LOADED**', true);
         return '';
     }
-    latest_message = findMessageText(latest_message);
-    if(llama_reset_everytime) {
-        setClient(null, llama_session.getChatHistory().filter(({type})=>type === 'system'))
-    }
+    // latest_message = findMessageText(latest_message);}
 
 
     stop_signal = new AbortController();
@@ -210,11 +216,28 @@ function downloadModel(url, cb=null) {
     })
 }
 
+/**
+ * format messages, reset history if needed
+ * @param {Message[]} messages 
+ */
+function formator(messages) {
+    const user_messages = messages.filter(e=>e.role === 'user');
+    const system_messages = messages.filter(e=>e.role === 'system');
+
+    const {llama_reset_everytime} = model_settings;
+    if(llama_reset_everytime) {
+        setClient(null, system_messages)
+    }
+
+    return user_messages.pop().content;
+}
+
 module.exports = {
     loadModel,
     chatCompletions,
     abortCompletion,
     setClient,
     downloadModel,
-    updateModelSettings
+    updateModelSettings,
+    formator
 }

src/components/settings/LlamaSettings.jsx

@@ -5,11 +5,13 @@ import TextComponent from "./components/TextComponent";
 import useIDB from "../../utils/idb";
 import { getPlatformSettings, updatePlatformSettings } from "../../utils/general_settings";
 import { DEFAULT_LLAMA_CPP_MODEL_URL } from "../../utils/types";
+import DropdownComponent from "./components/DropdownComponent";
 
 export default function LlamaSettings({ trigger, enabled, updateEnabled, openDownloadProtector, updateState }) {
 
     const [model_download_link, setModelDownloadLink] = useState('');
     const [reset_everytime, setResetEveryTime] = useState(false);
+    const [downloaded_models, setDownloadedModels] = useState([])
     const idb = useIDB();
 
     async function saveSettings() {
@@ -39,14 +41,23 @@ export default function LlamaSettings({ trigger, enabled, updateEnabled, openDow
                                 platform: 'Llama'
                             }
                             await idb.insert("downloaded-models", stored_model)
+                            setDownloadedModels([...downloaded_models, { title: stored_model['model-name'], value: stored_model.url }])
                         }
                     }
                 )
             }
-            // load model using the model name retrieved
-            await window['node-llama-cpp'].loadModel(stored_model['model-name'])
+            await openDownloadProtector(
+                'Loading model...',
+                `Loading model ${stored_model['model-name']}`,
+                async callback => {
+                    callback(100, false);
+                    // load model using the model name retrieved
+                    await window['node-llama-cpp'].loadModel(stored_model['model-name'])
+                    updateState();
+                    callback(100, true)
+                }
+            )
         }
-        updateState();
     }
 
     useEffect(()=>{
@@ -55,9 +66,18 @@ export default function LlamaSettings({ trigger, enabled, updateEnabled, openDow
     }, [trigger])
 
     useEffect(()=>{
-        const { llama_model_url, llama_reset_everytime } = getPlatformSettings();
-        setModelDownloadLink(llama_model_url || DEFAULT_LLAMA_CPP_MODEL_URL);
-        setResetEveryTime(llama_reset_everytime);
+        (async function() {
+            const { llama_model_url, llama_reset_everytime } = getPlatformSettings();
+            setModelDownloadLink(llama_model_url || DEFAULT_LLAMA_CPP_MODEL_URL);
+            setResetEveryTime(llama_reset_everytime);
+
+            const models = await idb.getAll("downloaded-models", {
+                where: [{'platform': 'Llama'}],
+                select: ["model-name", "url"]
+            });
+            setDownloadedModels(models.map(e=>{return { title: e['model-name'], value: e.url }}))
+        })()
+    // eslint-disable-next-line
     }, [])
 
     return (
@@ -67,9 +87,14 @@ export default function LlamaSettings({ trigger, enabled, updateEnabled, openDow
                 description={"Llama.cpp Engine is powerful and it allows you to run your own .gguf model using GPU on your local machine."}
                 value={enabled} cb={updateEnabled}
             />
+            <DropdownComponent 
+                title={"Select a downloaded model to use"}
+                description={"If there's no models, you might want to download a new one by enter url below."}
+                value={downloaded_models} cb={setModelDownloadLink}
+            />
             <TextComponent 
-                title={"Set the link of model you want to use"}
-                description={"Only models with extension .gguf can be used. Please make sure it can be run on your own machine."}
+                title={"Or enter the link of model you want to use"}
+                description={"Only models with extension .gguf can be used. Please make sure it can be run on your own machine. If the model of entered url is not downloaded, it will download automatically when you save settings."}
                 placeholder={"Default model is Microsoft Phi-3"}
                 value={model_download_link} cb={setModelDownloadLink}
             />

src/components/settings/components/DropdownComponent.jsx

@@ -0,0 +1,25 @@
+export default function DropdownComponent({ cb, value, title, description }) {
+    return (
+        <div className="component">
+            <div className="title">{title}</div>
+            { description && <div className="description">{description}</div> }
+            <select 
+                className="main-part" 
+                onClick={evt=>evt.preventDefault()}
+                onChange={evt=>cb && cb(evt.target.value)}
+            >
+                { value.map((e, i)=>{
+                    let title, value;
+                    if(typeof e === "object") {
+                        title = e.title;
+                        value = e.value;
+                    } else {
+                        title = e;
+                        value = e;
+                    }
+                    return <option key={`option-${i}`} value={value}>{ title }</option>
+                }) }
+            </select>
+        </div>
+    )
+}

src/styles/settings.css

@@ -164,6 +164,12 @@
     margin-left: var(--elem-margin);
 }
 
+.setting-page > .setting-section > .component > select.main-part {
+    border-radius: 7px;
+    background-color: white;
+    padding: 0px 7px;
+}
+
 dialog:has(.download-protector) {
     border: none;
     border-radius: 15px;

src/utils/workers/index.js

@@ -40,7 +40,8 @@ export function getCompletionFunctions(platform = null) {
                 completions: window['node-llama-cpp'].chatCompletions, 
                 abort: window['node-llama-cpp'].abortCompletion, 
                 platform: 'Llama',
-                initClient: window['node-llama-cpp'].setClient
+                initClient: window['node-llama-cpp'].setClient,
+                formator: window['node-llama-cpp'].formator
             }
         case "Wllama":
             return {