Redesign sensitive info protection settings

frontend/src/utils/featureSettings.ts

@@ -0,0 +1,51 @@
+export interface ChatPiiRedactionFeatureSettings {
+  enabled: boolean
+  inject_model_instruction: boolean
+}
+
+export type FeatureSettingsMap = Record<string, unknown>
+
+const DEFAULT_CHAT_PII_REDACTION_FEATURE_SETTINGS: ChatPiiRedactionFeatureSettings = {
+  enabled: false,
+  inject_model_instruction: true,
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return !!value && typeof value === 'object' && !Array.isArray(value)
+}
+
+export function readChatPiiRedactionFeatureSettings(
+  featureSettings: unknown,
+): ChatPiiRedactionFeatureSettings {
+  const feature = isRecord(featureSettings)
+    ? featureSettings.chat_pii_redaction
+    : null
+  if (!isRecord(feature)) {
+    return { ...DEFAULT_CHAT_PII_REDACTION_FEATURE_SETTINGS }
+  }
+  return {
+    enabled: feature.enabled === true,
+    inject_model_instruction: feature.inject_model_instruction !== false,
+  }
+}
+
+export function hasChatPiiRedactionFeatureSettings(featureSettings: unknown): boolean {
+  const feature = isRecord(featureSettings)
+    ? featureSettings.chat_pii_redaction
+    : null
+  return isRecord(feature)
+}
+
+export function mergeChatPiiRedactionFeatureSettings(
+  featureSettings: unknown,
+  chatPiiRedaction: ChatPiiRedactionFeatureSettings,
+): FeatureSettingsMap | null {
+  const settings: FeatureSettingsMap = isRecord(featureSettings)
+    ? { ...featureSettings }
+    : {}
+  settings.chat_pii_redaction = {
+    enabled: chatPiiRedaction.enabled,
+    inject_model_instruction: chatPiiRedaction.inject_model_instruction,
+  }
+  return Object.keys(settings).length > 0 ? settings : null
+}