@forestadmin/datasource-toolkit
Version:
52 lines • 4.9 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const record_1 = __importDefault(require("../../../utils/record"));
const projection_1 = __importDefault(require("../projection"));
class Sort extends Array {
get projection() {
return new projection_1.default(...this.map(s => s.field));
}
replaceClauses(callback) {
return this.map(ob => callback(ob)).reduce((memo, cbResult) => {
return Array.isArray(cbResult) ? new Sort(...memo, ...cbResult) : new Sort(...memo, cbResult);
}, new Sort());
}
nest(prefix) {
return prefix && prefix.length
? this.map(ob => ({ field: `${prefix}:${ob.field}`, ascending: ob.ascending }))
: this;
}
inverse() {
return this.map(({ field, ascending }) => ({ field, ascending: !ascending }));
}
unnest() {
const [prefix] = this[0].field.split(':');
if (!this.every(ob => ob.field.startsWith(prefix))) {
throw new Error('Cannot unnest sort.');
}
return this.map(({ field, ascending }) => ({
field: field.substring(prefix.length + 1),
ascending,
}));
}
apply(records) {
const { length } = this;
return records.sort((a, b) => {
for (let i = 0; i < length; i += 1) {
const { field, ascending } = this[i];
const valueOnA = record_1.default.getFieldValue(a, field);
const valueOnB = record_1.default.getFieldValue(b, field);
if (valueOnA < valueOnB)
return ascending ? -1 : 1;
if (valueOnA > valueOnB)
return ascending ? 1 : -1;
}
return 0;
});
}
}
exports.default = Sort;
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