From 6f1a7383e9b95b1f6d44e3df7ce1d485a06a2a17 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Wed, 6 May 2026 03:47:52 +0200
Subject: [PATCH] Add chat API service functions

---
 src/App.jsx    |  10 ++++
 src/chatApi.js | 143 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 153 insertions(+)
 create mode 100644 src/chatApi.js

diff --git a/src/App.jsx b/src/App.jsx
index 1cf7033..4313cb5 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -38,6 +38,16 @@ import {
 } from './backendApi'
 import { sanitizeChatTitle, splitThinkBlocks } from './chatText'
 import { buildModelPickerOptions } from './modelPicker'
+import {
+  fetchLocalLibraryContext,
+  fetchModelCapabilities,
+  fetchStartupOllamaStatus,
+  fetchWebSearchContext,
+  postChatMessage,
+  postRegenerateMessage,
+  prepareStartupModels,
+  requestGeneratedTitle,
+} from './chatApi'
 import {
   loadStoredWebsearchEngines,
   normalizeWebsearchEngines,
diff --git a/src/chatApi.js b/src/chatApi.js
new file mode 100644
index 0000000..80f7a00
--- /dev/null
+++ b/src/chatApi.js
@@ -0,0 +1,143 @@
+import { expectBackendJson } from './backendApi'
+
+export async function fetchModelCapabilities(apiBase, modelName, signal) {
+  const response = await fetch(
+    `${apiBase}/models/capabilities?name=${encodeURIComponent(modelName)}`,
+    { signal }
+  )
+  return expectBackendJson(response)
+}
+
+export async function fetchStartupOllamaStatus(apiBase) {
+  const response = await fetch(`${apiBase}/ollama/startup-status`)
+  return expectBackendJson(response)
+}
+
+export async function prepareStartupModels(apiBase) {
+  const response = await fetch(`${apiBase}/startup/prepare-models`, { method: 'POST' })
+  return expectBackendJson(response)
+}
+
+export async function fetchLocalLibraryContext(apiBase, slug, prompt, signal) {
+  if (!slug) return { contextBlock: null, sources: [] }
+
+  const response = await fetch(`${apiBase}/libraries/${slug}/context`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    signal,
+    body: JSON.stringify({
+      prompt,
+      top_k: 5,
+    }),
+  })
+  const data = await response.json()
+  return {
+    contextBlock: typeof data?.context_block === 'string' && data.context_block.trim()
+      ? data.context_block.trim()
+      : null,
+    sources: Array.isArray(data?.sources) ? data.sources : [],
+  }
+}
+
+export async function fetchWebSearchContext({
+  apiBase,
+  engines,
+  historyLimit = 8,
+  messages,
+  model,
+  prompt,
+  searxUrl,
+  signal,
+}) {
+  const response = await fetch(`${apiBase}/websearch`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    signal,
+    body: JSON.stringify({
+      prompt,
+      model,
+      messages,
+      history_limit: historyLimit,
+      searx_url: searxUrl || null,
+      engines: Array.isArray(engines) ? engines : null,
+    }),
+  })
+  const data = await response.json()
+  return {
+    contextBlock: typeof data?.context_block === 'string' && data.context_block.trim()
+      ? data.context_block.trim()
+      : null,
+    sources: Array.isArray(data?.sources) ? data.sources : [],
+  }
+}
+
+export function postChatMessage({
+  apiBase,
+  attachments,
+  enrichedMessage,
+  message,
+  model,
+  sessionId,
+  signal,
+  sources,
+  stream,
+  transcriptionModel,
+  visionModel,
+}) {
+  return fetch(`${apiBase}/chat`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    signal,
+    body: JSON.stringify({
+      session_id: sessionId,
+      model,
+      message,
+      enriched_message: enrichedMessage,
+      stream,
+      sources: sources || [],
+      attachments,
+      vision_model: visionModel || null,
+      transcription_model: transcriptionModel || null,
+    }),
+  })
+}
+
+export function postRegenerateMessage({
+  apiBase,
+  enrichedMessage,
+  index,
+  model,
+  sessionId,
+  signal,
+  sources,
+  stream,
+  transcriptionModel,
+  visionModel,
+}) {
+  return fetch(`${apiBase}/sessions/${sessionId}/regenerate`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    signal,
+    body: JSON.stringify({
+      index,
+      model,
+      stream,
+      enriched_message: enrichedMessage,
+      sources: sources || [],
+      vision_model: visionModel || null,
+      transcription_model: transcriptionModel || null,
+    }),
+  })
+}
+
+export function requestGeneratedTitle({ apiBase, message, model, sessionId }) {
+  return fetch(`${apiBase}/generate-title`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      session_id: sessionId,
+      message,
+      model,
+    }),
+  })
+}