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validation.js
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Fri, Feb 21, 06:41

validation.js
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import { argsert } from './argsert.js';
import { assertNotStrictEqual, } from './typings/common-types.js';
import { levenshtein as distance } from './utils/levenshtein.js';
import { objFilter } from './utils/obj-filter.js';
const specialKeys = ['$0', '--', '_'];
export function validation(yargs, usage, y18n, shim) {
const __ = y18n.__;
const __n = y18n.__n;
const self = {};
self.nonOptionCount = function nonOptionCount(argv) {
const demandedCommands = yargs.getDemandedCommands();
const positionalCount = argv._.length + (argv['--'] ? argv['--'].length : 0);
const _s = positionalCount - yargs.getContext().commands.length;
if (demandedCommands._ &&
(_s < demandedCommands._.min || _s > demandedCommands._.max)) {
if (_s < demandedCommands._.min) {
if (demandedCommands._.minMsg !== undefined) {
usage.fail(demandedCommands._.minMsg
? demandedCommands._.minMsg
.replace(/\$0/g, _s.toString())
.replace(/\$1/, demandedCommands._.min.toString())
: null);
}
else {
usage.fail(__n('Not enough non-option arguments: got %s, need at least %s', 'Not enough non-option arguments: got %s, need at least %s', _s, _s.toString(), demandedCommands._.min.toString()));
}
}
else if (_s > demandedCommands._.max) {
if (demandedCommands._.maxMsg !== undefined) {
usage.fail(demandedCommands._.maxMsg
? demandedCommands._.maxMsg
.replace(/\$0/g, _s.toString())
.replace(/\$1/, demandedCommands._.max.toString())
: null);
}
else {
usage.fail(__n('Too many non-option arguments: got %s, maximum of %s', 'Too many non-option arguments: got %s, maximum of %s', _s, _s.toString(), demandedCommands._.max.toString()));
}
}
}
};
self.positionalCount = function positionalCount(required, observed) {
if (observed < required) {
usage.fail(__n('Not enough non-option arguments: got %s, need at least %s', 'Not enough non-option arguments: got %s, need at least %s', observed, observed + '', required + ''));
}
};
self.requiredArguments = function requiredArguments(argv) {
const demandedOptions = yargs.getDemandedOptions();
let missing = null;
for (const key of Object.keys(demandedOptions)) {
if (!Object.prototype.hasOwnProperty.call(argv, key) ||
typeof argv[key] === 'undefined') {
missing = missing || {};
missing[key] = demandedOptions[key];
}
}
if (missing) {
const customMsgs = [];
for (const key of Object.keys(missing)) {
const msg = missing[key];
if (msg && customMsgs.indexOf(msg) < 0) {
customMsgs.push(msg);
}
}
const customMsg = customMsgs.length ? `\n${customMsgs.join('\n')}` : '';
usage.fail(__n('Missing required argument: %s', 'Missing required arguments: %s', Object.keys(missing).length, Object.keys(missing).join(', ') + customMsg));
}
};
self.unknownArguments = function unknownArguments(argv, aliases, positionalMap, isDefaultCommand, checkPositionals = true) {
const commandKeys = yargs.getCommandInstance().getCommands();
const unknown = [];
const currentContext = yargs.getContext();
Object.keys(argv).forEach(key => {
if (specialKeys.indexOf(key) === -1 &&
!Object.prototype.hasOwnProperty.call(positionalMap, key) &&
!Object.prototype.hasOwnProperty.call(yargs._getParseContext(), key) &&
!self.isValidAndSomeAliasIsNotNew(key, aliases)) {
unknown.push(key);
}
});
if (checkPositionals &&
(currentContext.commands.length > 0 ||
commandKeys.length > 0 ||
isDefaultCommand)) {
argv._.slice(currentContext.commands.length).forEach(key => {
if (commandKeys.indexOf('' + key) === -1) {
unknown.push('' + key);
}
});
}
if (unknown.length > 0) {
usage.fail(__n('Unknown argument: %s', 'Unknown arguments: %s', unknown.length, unknown.join(', ')));
}
};
self.unknownCommands = function unknownCommands(argv) {
const commandKeys = yargs.getCommandInstance().getCommands();
const unknown = [];
const currentContext = yargs.getContext();
if (currentContext.commands.length > 0 || commandKeys.length > 0) {
argv._.slice(currentContext.commands.length).forEach(key => {
if (commandKeys.indexOf('' + key) === -1) {
unknown.push('' + key);
}
});
}
if (unknown.length > 0) {
usage.fail(__n('Unknown command: %s', 'Unknown commands: %s', unknown.length, unknown.join(', ')));
return true;
}
else {
return false;
}
};
self.isValidAndSomeAliasIsNotNew = function isValidAndSomeAliasIsNotNew(key, aliases) {
if (!Object.prototype.hasOwnProperty.call(aliases, key)) {
return false;
}
const newAliases = yargs.parsed.newAliases;
for (const a of [key, ...aliases[key]]) {
if (!Object.prototype.hasOwnProperty.call(newAliases, a) ||
!newAliases[key]) {
return true;
}
}
return false;
};
self.limitedChoices = function limitedChoices(argv) {
const options = yargs.getOptions();
const invalid = {};
if (!Object.keys(options.choices).length)
return;
Object.keys(argv).forEach(key => {
if (specialKeys.indexOf(key) === -1 &&
Object.prototype.hasOwnProperty.call(options.choices, key)) {
[].concat(argv[key]).forEach(value => {
if (options.choices[key].indexOf(value) === -1 &&
value !== undefined) {
invalid[key] = (invalid[key] || []).concat(value);
}
});
}
});
const invalidKeys = Object.keys(invalid);
if (!invalidKeys.length)
return;
let msg = __('Invalid values:');
invalidKeys.forEach(key => {
msg += `\n ${__('Argument: %s, Given: %s, Choices: %s', key, usage.stringifiedValues(invalid[key]), usage.stringifiedValues(options.choices[key]))}`;
});
usage.fail(msg);
};
let checks = [];
self.check = function check(f, global) {
checks.push({
func: f,
global,
});
};
self.customChecks = function customChecks(argv, aliases) {
for (let i = 0, f; (f = checks[i]) !== undefined; i++) {
const func = f.func;
let result = null;
try {
result = func(argv, aliases);
}
catch (err) {
usage.fail(err.message ? err.message : err, err);
continue;
}
if (!result) {
usage.fail(__('Argument check failed: %s', func.toString()));
}
else if (typeof result === 'string' || result instanceof Error) {
usage.fail(result.toString(), result);
}
}
};
let implied = {};
self.implies = function implies(key, value) {
argsert('<string|object> [array|number|string]', [key, value], arguments.length);
if (typeof key === 'object') {
Object.keys(key).forEach(k => {
self.implies(k, key[k]);
});
}
else {
yargs.global(key);
if (!implied[key]) {
implied[key] = [];
}
if (Array.isArray(value)) {
value.forEach(i => self.implies(key, i));
}
else {
assertNotStrictEqual(value, undefined, shim);
implied[key].push(value);
}
}
};
self.getImplied = function getImplied() {
return implied;
};
function keyExists(argv, val) {
const num = Number(val);
val = isNaN(num) ? val : num;
if (typeof val === 'number') {
val = argv._.length >= val;
}
else if (val.match(/^--no-.+/)) {
val = val.match(/^--no-(.+)/)[1];
val = !argv[val];
}
else {
val = argv[val];
}
return val;
}
self.implications = function implications(argv) {
const implyFail = [];
Object.keys(implied).forEach(key => {
const origKey = key;
(implied[key] || []).forEach(value => {
let key = origKey;
const origValue = value;
key = keyExists(argv, key);
value = keyExists(argv, value);
if (key && !value) {
implyFail.push(` ${origKey} -> ${origValue}`);
}
});
});
if (implyFail.length) {
let msg = `${__('Implications failed:')}\n`;
implyFail.forEach(value => {
msg += value;
});
usage.fail(msg);
}
};
let conflicting = {};
self.conflicts = function conflicts(key, value) {
argsert('<string|object> [array|string]', [key, value], arguments.length);
if (typeof key === 'object') {
Object.keys(key).forEach(k => {
self.conflicts(k, key[k]);
});
}
else {
yargs.global(key);
if (!conflicting[key]) {
conflicting[key] = [];
}
if (Array.isArray(value)) {
value.forEach(i => self.conflicts(key, i));
}
else {
conflicting[key].push(value);
}
}
};
self.getConflicting = () => conflicting;
self.conflicting = function conflictingFn(argv) {
Object.keys(argv).forEach(key => {
if (conflicting[key]) {
conflicting[key].forEach(value => {
if (value && argv[key] !== undefined && argv[value] !== undefined) {
usage.fail(__('Arguments %s and %s are mutually exclusive', key, value));
}
});
}
});
};
self.recommendCommands = function recommendCommands(cmd, potentialCommands) {
const threshold = 3;
potentialCommands = potentialCommands.sort((a, b) => b.length - a.length);
let recommended = null;
let bestDistance = Infinity;
for (let i = 0, candidate; (candidate = potentialCommands[i]) !== undefined; i++) {
const d = distance(cmd, candidate);
if (d <= threshold && d < bestDistance) {
bestDistance = d;
recommended = candidate;
}
}
if (recommended)
usage.fail(__('Did you mean %s?', recommended));
};
self.reset = function reset(localLookup) {
implied = objFilter(implied, k => !localLookup[k]);
conflicting = objFilter(conflicting, k => !localLookup[k]);
checks = checks.filter(c => c.global);
return self;
};
const frozens = [];
self.freeze = function freeze() {
frozens.push({
implied,
checks,
conflicting,
});
};
self.unfreeze = function unfreeze() {
const frozen = frozens.pop();
assertNotStrictEqual(frozen, undefined, shim);
({ implied, checks, conflicting } = frozen);
};
return self;
}

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