constructs
Version:
A programming model for software-defined state
72 lines • 5.21 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.ADDR_SEP = void 0;
exports.addressOf = addressOf;
const crypto = __importStar(require("crypto"));
/**
* Constructs with this id are completely hidden from the address calculation.
*/
const HIDDEN_ID = 'Default';
/**
* Separator used to delimit path components while calculating an address.
*
* Ids are sanitized before they become path components (see `sanitizeId()` in
* `construct.ts`), so that a single component never contains this character.
* Otherwise one component could hash like several: the single component
* `a<sep>b` would be fed to the hash exactly like the two components `a` and
* `b`.
*/
exports.ADDR_SEP = '\n';
/**
* Calculates the construct addr based on path components.
*
* Components named `Default` (case sensitive) are excluded from addr
* calculation to allow tree refactorings.
*/
function addressOf(components) {
const hash = crypto.createHash('sha1');
for (const c of components) {
// skip components called "Default" to enable refactorings
if (c === HIDDEN_ID) {
continue;
}
hash.update(c);
hash.update(exports.ADDR_SEP);
}
// prefix with "c8" so to ensure it starts with non-digit.
return 'c8' + hash.digest('hex');
}
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