Use official ollama npm client for all LLM calls

Replaces hand-rolled fetch to /api/chat with the ollama@0.6.3 package.

The package supplies proper Accept/Content-Type/User-Agent headers and

auto-handles the Ollama protocol, fixing the CDN 403s Node's bare fetch

gets against ollama.com during filing.

Both organize and search LLM ranking now route through controller/ollama.js.

Signed-off-by: William Mantly <wmantly@gmail.com>

controller/search.js

@@ -22,17 +22,6 @@ function humanSize(bytes){
 	return `${bytes.toFixed(bytes < 10 && i > 0 ? 1 : 0)} ${units[i]}`;
 }
 
-async function fetchJSON(url, options){
-	let res = await fetch(url, options);
-	if(!res.ok){
-		let error = new Error(`UpstreamError`);
-		error.message = `Request to ${url.split('?')[0]} failed( ${res.status})`;
-		error.status = 502;
-		throw error;
-	}
-	return await res.json();
-}
-
 // Turn a raw TPB category id into 'movie' | 'tv' | null.
 function videoKind(category){
 	category = parseInt(category, 10);
@@ -179,27 +168,10 @@ async function rankReleases(candidates, meta){
 		imdb: t.imdb || null,
 	}));
 
-	let body = {
-		model: conf.ollama.model,
-		stream: false,
-		format: 'json',
-		messages: [
-			{ role: 'system', content: buildSystemPrompt(meta.title, meta.year, meta.today) },
-			{ role: 'user', content: JSON.stringify(compact) },
-		],
-	};
-
-	let data = await fetchJSON(`${conf.ollama.url}/api/chat`, {
-		method: 'POST',
-		headers: {
-			'Content-Type': 'application/json',
-			'Authorization': `Bearer ${conf.ollama.apiKey}`,
-			'User-Agent': 'tpbproxy/1.0 (search; +https://github.com/wmantly/tpbproxy)',
-		},
-		body: JSON.stringify(body),
-	});
-
-	let parsed = extractJSON(data.message && data.message.content);
+	let parsed = await ollama.chatJSON(
+		buildSystemPrompt(meta.title, meta.year, meta.today),
+		JSON.stringify(compact)
+	);
 	let options = Array.isArray(parsed.options) ? parsed.options : [];
 	if(!options.length) throw new Error('Model returned no options');
 	return options;