sveltekit-superforms-5
Version:
<p align="center"> <img src="https://github.com/ciscoheat/sveltekit-superforms/raw/main/logo.svg" width="150px" align="center" alt="Superforms logo" /> <h1 align="center">Superforms 💥</h1> <p align="center">Making SvelteKit forms a pleasure to use!
57 lines (56 loc) • 1.9 kB
JavaScript
import { schemaInfo } from './schemaInfo.js';
export function schemaHash(schema) {
return hashCode(_schemaHash(schemaInfo(schema, false, []), 0, []));
}
function _schemaHash(info, depth, path) {
if (!info)
return '';
function tab() {
return ' '.repeat(depth);
}
function mapSchemas(schemas) {
return schemas
.map((s) => _schemaHash(schemaInfo(s, info?.isOptional ?? false, path), depth + 1, path))
.filter((s) => s)
.join('|');
}
function nullish() {
const output = [];
if (info?.isNullable)
output.push('null');
if (info?.isOptional)
output.push('undefined');
return !output.length ? '' : '|' + output.join('|');
}
// Union
if (info.union) {
return 'Union {\n ' + tab() + mapSchemas(info.union) + '\n' + tab() + '}' + nullish();
}
// Objects
if (info.properties) {
const output = [];
for (const [key, prop] of Object.entries(info.properties)) {
const propInfo = schemaInfo(prop, !info.required?.includes(key) || prop.default !== undefined, [key]);
output.push(key + ': ' + _schemaHash(propInfo, depth + 1, path));
}
return 'Object {\n ' + tab() + output.join(',\n ') + '\n' + tab() + '}' + nullish();
}
// Arrays
if (info.array) {
return 'Array[' + mapSchemas(info.array) + ']' + nullish();
}
return info.types.join('|') + nullish();
}
// https://stackoverflow.com/a/8831937/70894
function hashCode(str) {
let hash = 0;
for (let i = 0, len = str.length; i < len; i++) {
const chr = str.charCodeAt(i);
hash = (hash << 5) - hash + chr;
hash |= 0; // Convert to 32bit integer
}
// Make it unsigned, for the hash appearance
if (hash < 0)
hash = hash >>> 0;
return hash.toString(36);
}