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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x | /**
* Plain DOM utility (no UI5 dependency) for the "hidden `<input type=file>`"
* upload dialog pattern, previously duplicated with identical boilerplate
* across the App, Main and MyProducts controllers.
*
* Opens the browser's file picker restricted to `.json` files and reads the
* selected file as text.
* @param onContent Called with the selected file's text content once read
* @param onError Called if reading the selected file fails
*/
export function pickJsonFile(
onContent: (fileContent: string) => void,
onError: () => void
): void {
const fileInput = document.createElement("input");
fileInput.type = "file";
fileInput.accept = ".json,application/json";
fileInput.style.display = "none";
fileInput.addEventListener("change", () => {
const selectedFile = fileInput.files?.[0];
Eif (document.body.contains(fileInput)) {
document.body.removeChild(fileInput);
}
Iif (!selectedFile) {
return;
}
const fileReader = new FileReader();
fileReader.onload = () => {
// readAsText() always yields a string (or null) result, never an ArrayBuffer
onContent(typeof fileReader.result === "string" ? fileReader.result : "");
};
fileReader.onerror = () => {
onError();
};
fileReader.readAsText(selectedFile);
});
document.body.appendChild(fileInput);
fileInput.click();
}
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