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import { useEffect, useRef, FormEvent, useState, useCallback } from "react";
import TextareaAutosize from "react-textarea-autosize";
import { getRandomQuerySuggestion } from "../modules/querySuggestions";
import { SettingsButton } from "./SettingsButton";
export function SearchForm({
query,
updateQuery,
}: {
query: string;
updateQuery: (query: string) => void;
}) {
const textAreaRef = useRef<HTMLTextAreaElement>(null);
const windowInnerHeight = useWindowInnerHeight();
const [suggestedQuery, setSuggestedQuery] = useState("");
useEffect(() => {
getRandomQuerySuggestion().then((querySuggestion) => {
setSuggestedQuery(querySuggestion);
});
}, []);
const handleInputChange = async (
event: React.ChangeEvent<HTMLTextAreaElement>,
) => {
const userQueryIsBlank = event.target.value.length === 0;
const suggestedQueryIsBlank = suggestedQuery.length === 0;
if (userQueryIsBlank && suggestedQueryIsBlank) {
setSuggestedQuery(await getRandomQuerySuggestion());
} else if (!userQueryIsBlank && !suggestedQueryIsBlank) {
setSuggestedQuery("");
}
};
const startSearching = useCallback(() => {
let queryToEncode = suggestedQuery;
if (textAreaRef.current && textAreaRef.current.value.trim().length > 0) {
queryToEncode = textAreaRef.current.value;
}
self.history.pushState(
null,
"",
`/?q=${encodeURIComponent(queryToEncode)}`,
);
updateQuery(queryToEncode);
location.reload();
}, [suggestedQuery, updateQuery]);
const handleSubmit = (event: FormEvent<HTMLFormElement>) => {
event.preventDefault();
startSearching();
};
useEffect(() => {
const keyboardEventHandler = (event: KeyboardEvent) => {
if (event.code === "Enter" && !event.shiftKey) {
event.preventDefault();
startSearching();
}
};
const textArea = textAreaRef.current;
textArea?.addEventListener("keypress", keyboardEventHandler);
return () => {
textArea?.removeEventListener("keypress", keyboardEventHandler);
};
}, [startSearching]);
return (
<div
style={
query.length === 0
? {
display: "flex",
justifyContent: "center",
alignItems: "center",
height: windowInnerHeight * 0.8,
}
: undefined
}
>
<form onSubmit={handleSubmit} style={{ width: "100%" }}>
<TextareaAutosize
defaultValue={query}
placeholder={suggestedQuery}
ref={textAreaRef}
onChange={handleInputChange}
autoFocus
minRows={1}
maxRows={6}
/>
<div style={{ display: "flex", width: "100%" }}>
<button type="submit" style={{ width: "100%", fontSize: "small" }}>
Search
</button>
<SettingsButton />
</div>
</form>
</div>
);
}
function useWindowInnerHeight() {
const [windowInnerHeight, setWindowInnerHeight] = useState(self.innerHeight);
useEffect(() => {
const handleResize = () => setWindowInnerHeight(self.innerHeight);
self.addEventListener("resize", handleResize);
return () => self.removeEventListener("resize", handleResize);
}, []);
return windowInnerHeight;
}
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