66 lines
2.4 KiB
TypeScript
66 lines
2.4 KiB
TypeScript
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/**
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* The shared settings-PUT body parser — the one seam both settings routes
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* use (per-chat: app/api/chats/[id]/settings; pre-session draft:
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* app/api/settings/draft). Extracted verbatim from the per-chat route
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* (draft-settings wave, 2026-09-18): identical parse, identical errors.
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*
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* Replace-whole semantics: the client sends the complete desired object;
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* absent fields are absent overrides ({} clears everything). No merges, so
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* a stale client can never resurrect a cleared override.
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*/
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import type { ThinkingLevel } from "@earendil-works/pi-agent-core";
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import { GRAPH_CONTEXT_TOKENS_MAX, type ChatSettings } from "../core";
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/** Parsed-or-rejected — `ok: false` carries the 400's error message. */
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export type SettingsBodyResult =
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| { ok: true; settings: ChatSettings }
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| { ok: false; error: string };
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export function parseSettingsBody(body: unknown): SettingsBodyResult {
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if (!body || typeof body !== "object" || Array.isArray(body)) {
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return { ok: false, error: "Invalid JSON body" };
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}
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const raw = body as {
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model?: { provider?: unknown; id?: unknown };
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thinkingLevel?: unknown;
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graphContextTokens?: unknown;
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};
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const settings: ChatSettings = {};
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if (raw.model !== undefined) {
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if (
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typeof raw.model !== "object" ||
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raw.model === null ||
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typeof raw.model.provider !== "string" ||
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typeof raw.model.id !== "string"
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) {
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return { ok: false, error: "model must be {provider, id}" };
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}
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settings.model = { provider: raw.model.provider, id: raw.model.id };
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}
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if (raw.thinkingLevel !== undefined) {
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if (typeof raw.thinkingLevel !== "string") {
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return { ok: false, error: "thinkingLevel must be a string" };
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}
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settings.thinkingLevel = raw.thinkingLevel as ThinkingLevel;
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}
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// Graph context injection budget (vision-context-injection.md): integer
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// tokens, 0 (off) to GRAPH_CONTEXT_TOKENS_MAX, no silent clamping — the
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// slider is the only writer, and it only ever sends multiples of the step.
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if (raw.graphContextTokens !== undefined) {
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if (
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typeof raw.graphContextTokens !== "number" ||
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!Number.isInteger(raw.graphContextTokens) ||
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raw.graphContextTokens < 0 ||
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raw.graphContextTokens > GRAPH_CONTEXT_TOKENS_MAX
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) {
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return {
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ok: false,
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error: `graphContextTokens must be an integer between 0 and ${GRAPH_CONTEXT_TOKENS_MAX}`,
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};
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}
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settings.graphContextTokens = raw.graphContextTokens;
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}
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return { ok: true, settings };
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}
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