Allow API endpoints to be changed in env

.env

@@ -1,2 +1,4 @@
 # Uncomment the following line to use the mocked API
 #VITE_API_BASE=http://localhost:5174
+#VITE_ENDPOINT_COMPLETIONS=/v1/chat/completions
+#VITE_ENDPOINT_COMPLETIONS=/v1/models

src/lib/ApiUtil.svelte

@@ -0,0 +1,10 @@
+<script context="module" lang="ts">
+  // This makes it possible to override the OpenAI API base URL in the .env file
+  const apiBase = import.meta.env.VITE_API_BASE || 'https://api.openai.com'
+  const endpointCompletions = import.meta.env.VITE_ENDPOINT_COMPLETIONS || '/v1/chat/completions'
+  const endpointModels = import.meta.env.VITE_ENDPOINT_COMPLETIONS || '/v1/models'
+
+  export const getApiBase = ():string => apiBase
+  export const getEndpointCompletions = ():string => endpointCompletions
+  export const getEndpointModels = ():string => endpointModels
+</script>

src/lib/Chat.svelte

@@ -50,9 +50,7 @@
   import PromptInput from './PromptInput.svelte'
   import { ChatCompletionResponse } from './ChatCompletionResponse.svelte'
   import { fetchEventSource } from '@microsoft/fetch-event-source'
-
-  // This makes it possible to override the OpenAI API base URL in the .env file
-  const apiBase = import.meta.env.VITE_API_BASE || 'https://api.openai.com'
+  import { getApiBase, getEndpointCompletions } from './ApiUtil.svelte'
 
   export let params = { chatId: '' }
   const chatId: number = parseInt(params.chatId)
@@ -394,7 +392,7 @@
           updatingMessage = ''
           scrollToBottom()
         })
-        fetchEventSource(apiBase + '/v1/chat/completions', {
+        fetchEventSource(getApiBase() + getEndpointCompletions(), {
           ...fetchOptions,
           onmessage (ev) {
             // Remove updating indicator
@@ -423,7 +421,7 @@
           scrollToBottom()
         })
       } else {
-        const response = await fetch(apiBase + '/v1/chat/completions', fetchOptions)
+        const response = await fetch(getApiBase() + getEndpointCompletions(), fetchOptions)
         const json = await response.json()
   
         // Remove updating indicator

src/lib/ChatSettingsModal.svelte

@@ -35,12 +35,10 @@
   import { replace } from 'svelte-spa-router'
   import { openModal } from 'svelte-modals'
   import PromptConfirm from './PromptConfirm.svelte'
+  import { getApiBase, getEndpointModels } from './ApiUtil.svelte'
 
   export let chatId:number
   export const show = () => { showSettings() }
-
-  // This makes it possible to override the OpenAI API base URL in the .env file
-  const apiBase = import.meta.env.VITE_API_BASE || 'https://api.openai.com'
   
   let showSettingsModal = 0
   let showProfileMenu:boolean = false
@@ -179,7 +177,7 @@
   
     // Load available models from OpenAI
     const allModels = (await (
-      await fetch(apiBase + '/v1/models', {
+      await fetch(getApiBase() + getEndpointModels(), {
         method: 'GET',
         headers: {
           Authorization: `Bearer ${$apiKeyStorage}`,