lambda-live-debugger
Version:
Debug Lambda functions locally like it is running in the cloud
187 lines (186 loc) • 7.04 kB
JavaScript
import { createPrompt, useState, useKeypress, usePrefix, usePagination, useEffect, useMemo, isDownKey, isEnterKey, isTabKey, isUpKey, Separator, makeTheme, } from '@inquirer/core';
import { styleText } from 'node:util';
import figures from '@inquirer/figures';
const searchTheme = {
icon: { cursor: figures.pointer },
style: {
disabled: (text) => styleText('dim', `- ${text}`),
searchTerm: (text) => styleText('cyan', text),
description: (text) => styleText('cyan', text),
keysHelpTip: (keys) => keys
.map(([key, action]) => `${styleText('bold', key)} ${styleText('dim', action)}`)
.join(styleText('dim', ' • ')),
},
};
function isSelectable(item) {
return !Separator.isSeparator(item) && !item.disabled;
}
function normalizeChoices(choices) {
return choices.map((choice) => {
if (Separator.isSeparator(choice))
return choice;
if (typeof choice === 'string') {
return {
value: choice,
name: choice,
short: choice,
disabled: false,
};
}
const name = choice.name ?? String(choice.value);
const normalizedChoice = {
value: choice.value,
name,
short: choice.short ?? name,
disabled: choice.disabled ?? false,
};
if (choice.description) {
normalizedChoice.description = choice.description;
}
return normalizedChoice;
});
}
export default createPrompt((config, done) => {
const { pageSize = 7, validate = () => true } = config;
const theme = makeTheme(searchTheme, config.theme);
const [status, setStatus] = useState('loading');
const [searchTerm, setSearchTerm] = useState('');
const [searchResults, setSearchResults] = useState([]);
const [searchError, setSearchError] = useState();
const prefix = usePrefix({ status, theme });
const bounds = useMemo(() => {
const first = searchResults.findIndex(isSelectable);
const last = searchResults.findLastIndex(isSelectable);
return { first, last };
}, [searchResults]);
const [active = bounds.first, setActive] = useState();
useEffect(() => {
const controller = new AbortController();
setStatus('loading');
setSearchError(undefined);
const fetchResults = async () => {
try {
const results = await config.source(searchTerm || undefined, {
signal: controller.signal,
});
if (!controller.signal.aborted) {
// Reset the pointer
setActive(undefined);
setSearchError(undefined);
setSearchResults(normalizeChoices(results));
setStatus('idle');
}
}
catch (error) {
if (!controller.signal.aborted && error instanceof Error) {
setSearchError(error.message);
}
}
};
void fetchResults();
return () => {
controller.abort();
};
}, [searchTerm]);
// Safe to assume the cursor position never points to a Separator.
const selectedChoice = searchResults[active];
useKeypress(async (key, rl) => {
if (isEnterKey(key)) {
if (selectedChoice) {
setStatus('loading');
const isValid = await validate(selectedChoice.value);
setStatus('idle');
if (isValid === true) {
setStatus('done');
done(selectedChoice.value);
}
else if (selectedChoice.name === searchTerm) {
setSearchError(isValid || 'You must provide a valid value');
}
else {
// Reset line with new search term
rl.write(selectedChoice.name);
setSearchTerm(selectedChoice.name);
}
}
else {
// Reset the readline line value to the previous value. On line event, the value
// get cleared, forcing the user to re-enter the value instead of fixing it.
rl.write(searchTerm);
}
}
else if (isTabKey(key) && selectedChoice) {
rl.clearLine(0); // Remove the tab character.
rl.write(selectedChoice.name);
setSearchTerm(selectedChoice.name);
}
else if (status !== 'loading' && (isUpKey(key) || isDownKey(key))) {
rl.clearLine(0);
if ((isUpKey(key) && active !== bounds.first) ||
(isDownKey(key) && active !== bounds.last)) {
const offset = isUpKey(key) ? -1 : 1;
let next = active;
do {
next = (next + offset + searchResults.length) % searchResults.length;
} while (!isSelectable(searchResults[next]));
setActive(next);
}
}
else {
setSearchTerm(rl.line);
}
});
const message = theme.style.message(config.message, status);
const helpLine = theme.style.keysHelpTip([
['↑↓', 'navigate'],
['⏎', 'select'],
]);
const page = usePagination({
items: searchResults,
active,
renderItem({ item, isActive }) {
if (Separator.isSeparator(item)) {
return ` ${item.separator}`;
}
if (item.disabled) {
const disabledLabel = typeof item.disabled === 'string' ? item.disabled : '(disabled)';
return theme.style.disabled(`${item.name} ${disabledLabel}`);
}
const color = isActive ? theme.style.highlight : (x) => x;
const cursor = isActive ? theme.icon.cursor : ` `;
return color(`${cursor} ${item.name}`);
},
pageSize,
loop: false,
});
let error;
if (searchError) {
error = theme.style.error(searchError);
}
else if (searchResults.length === 0 && searchTerm !== '' && status === 'idle') {
error = theme.style.error('No results found');
}
let searchStr;
if (status === 'done' && selectedChoice) {
return [prefix, message, theme.style.answer(selectedChoice.short)]
.filter(Boolean)
.join(' ')
.trimEnd();
}
else {
searchStr = theme.style.searchTerm(searchTerm);
}
const description = selectedChoice?.description;
const header = [prefix, message, searchStr].filter(Boolean).join(' ').trimEnd();
const body = [
error ?? page,
' ',
description ? theme.style.description(description) : '',
helpLine,
]
.filter(Boolean)
.join('\n')
.trimEnd();
return [header, body];
});
export { Separator } from '@inquirer/core';