azurite
Version:
An open source Azure Storage API compatible server
51 lines • 2.59 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
const ValueNode_1 = tslib_1.__importDefault(require("./ValueNode"));
/**
* Represents a constant value of type `datetime` which is stored in its underlying JavaScript representation.
*
* This is used to hold datetime values that are provided in the query (using the `datetime'...'` syntax)
* and is used to ensure that these values are evaluated against their normalized ISO8601 format. For example,
* the query `PartitionKey eq datetime'2019-01-01T00:00:00.000Z'` would contain a `DateTimeNode` with the value
* `2019-01-01T00:00:00.000Z`.
*/
class DateTimeNode extends ValueNode_1.default {
get name() {
return "datetime";
}
compare(context, other) {
const otherValue = other.evaluate(context);
// NOTE(notheotherben): This is a special case for the `null` value, which is not a valid datetime value in Azure Storage
// but is considered a valid input for "epoch" in the JS Date constructor. We're explicitly handling
// returning NaN here to ensure that null doesn't match dates in the table.
if (this.value === null || otherValue === null) {
return NaN;
}
// NOTE(notheotherben): This approach leverages the fact that the `Date` constructor will parse ISO8601 strings
// however it runs into a limitation of the accuracy of JS dates (which are limited to millisecond
// resolution). As a result, we're effectively truncating the value to millisecond precision by doing
// this. This is fundamentally a trade-off between enforcing valid datetime values and providing perfect
// accuracy, and we've opted to enforce valid datetime values as those are more likely to cause problems
// when moving to production.
const thisDate = new Date(this.value);
const otherDate = new Date(otherValue);
if (isNaN(thisDate.valueOf()) || isNaN(otherDate.valueOf())) {
return NaN;
}
else if (thisDate.valueOf() < otherDate.valueOf()) {
return -1;
}
else if (thisDate.valueOf() > otherDate.valueOf()) {
return 1;
}
else if (thisDate.valueOf() === otherDate.valueOf()) {
return 0;
}
else {
return NaN;
}
}
}
exports.default = DateTimeNode;
//# sourceMappingURL=DateTimeNode.js.map