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import { usePubSub } from "create-pubsub/react";
import { useCallback, useEffect, useRef, useState } from "react";
import { settingsPubSub } from "../../../modules/pubSub";
export function useReasoningContent(text: string) {
const [settings] = usePubSub(settingsPubSub);
const [thinkingTimeMs, setThinkingTimeMs] = useState(0);
const startTimeRef = useRef<number | null>(null);
const initializeTimingIfNeeded = useCallback(() => {
if (startTimeRef.current === null) {
startTimeRef.current = Date.now();
}
}, []);
const finalizeThinkingTimeIfNeeded = useCallback(() => {
if (startTimeRef.current !== null) {
setThinkingTimeMs(Date.now() - startTimeRef.current);
startTimeRef.current = null;
}
}, []);
const extractReasoningAndMainContent = useCallback(
(text: string, startMarker: string, endMarker: string) => {
if (!text)
return { reasoningContent: "", mainContent: "", isGenerating: false };
if (!text.trim().startsWith(startMarker))
return { reasoningContent: "", mainContent: text, isGenerating: false };
const endIndex = text.indexOf(endMarker);
if (endIndex === -1) {
initializeTimingIfNeeded();
return {
reasoningContent: text.slice(startMarker.length),
mainContent: "",
isGenerating: true,
};
}
finalizeThinkingTimeIfNeeded();
return {
reasoningContent: text.slice(startMarker.length, endIndex),
mainContent: text.slice(endIndex + endMarker.length),
isGenerating: false,
};
},
[initializeTimingIfNeeded, finalizeThinkingTimeIfNeeded],
);
const result = extractReasoningAndMainContent(
text,
settings.reasoningStartMarker,
settings.reasoningEndMarker,
);
useEffect(() => {
return () => {
startTimeRef.current = null;
};
}, []);
return {
...result,
thinkingTimeMs,
};
}
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