@sitecore/sc-contenthub-webclient-sdk/esm/dirty-value-calculator.js

Sitecore Content Hub WebClient SDK.

class DirtyValueCalculator {
    setOriginalValue(value) {
        this._originalHashValue = DirtyValueCalculator.computeHash(value);
    }
    isDirty(currentValue) {
        const valueHash = DirtyValueCalculator.computeHash(currentValue);
        if (typeof currentValue === "boolean" &&
            this._originalHashValue === DirtyValueCalculator.NullHash &&
            valueHash === DirtyValueCalculator.FalseValueHash) {
            return false;
        }
        if (typeof currentValue === "string" &&
            this._originalHashValue === DirtyValueCalculator.NullHash &&
            valueHash === DirtyValueCalculator.EmptyStringHash) {
            return false;
        }
        return valueHash !== this._originalHashValue;
    }
    static computeHash(value) {
        return DirtyValueCalculator.getStringHash(`${typeof value}_${JSON.stringify(value)}`);
    }
    static getStringHash(str) {
        let hash1 = 5381;
        let hash2 = 52711;
        let i = str.length;
        while (i--) {
            const char = str.charCodeAt(i);
            hash1 = (hash1 * 33) ^ char;
            hash2 = (hash2 * 33) ^ char;
        }
        return ((hash1 >>> 0) << 12) + (hash2 >>> 0);
    }
}
DirtyValueCalculator.NullHash = DirtyValueCalculator.computeHash(null);
DirtyValueCalculator.EmptyStringHash = DirtyValueCalculator.computeHash("");
DirtyValueCalculator.FalseValueHash = DirtyValueCalculator.computeHash(false);
export default DirtyValueCalculator;
export { DirtyValueCalculator };
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