@dpkit/table/build/field/parse.js

Data Package implementation in TypeScript.

import { col, lit, when } from "nodejs-polars";
import { parseArrayField } from "./types/array.js";
import { parseBooleanField } from "./types/boolean.js";
import { parseDateField } from "./types/date.js";
import { parseDatetimeField } from "./types/datetime.js";
import { parseDurationField } from "./types/duration.js";
import { parseGeojsonField } from "./types/geojson.js";
import { parseGeopointField } from "./types/geopoint.js";
import { parseIntegerField } from "./types/integer.js";
import { parseListField } from "./types/list.js";
import { parseNumberField } from "./types/number.js";
import { parseObjectField } from "./types/object.js";
import { parseStringField } from "./types/string.js";
import { parseTimeField } from "./types/time.js";
import { parseYearField } from "./types/year.js";
import { parseYearmonthField } from "./types/yearmonth.js";
const DEFAULT_MISSING_VALUES = [""];
export function parseField(field, options) {
    let expr = options?.expr ?? col(field.name);
    const missingValues = field.missingValues ??
        options?.schema?.missingValues ??
        DEFAULT_MISSING_VALUES;
    const flattenMissingValues = missingValues.map(item => typeof item === "string" ? item : item.value);
    if (flattenMissingValues.length) {
        expr = when(expr.isIn(flattenMissingValues))
            .then(lit(null))
            .otherwise(expr)
            .alias(field.name);
    }
    switch (field.type) {
        case "string":
            return parseStringField(field, expr);
        case "integer":
            return parseIntegerField(field, expr);
        case "number":
            return parseNumberField(field, expr);
        case "boolean":
            return parseBooleanField(field, expr);
        case "date":
            return parseDateField(field, expr);
        case "datetime":
            return parseDatetimeField(field, expr);
        case "time":
            return parseTimeField(field, expr);
        case "year":
            return parseYearField(field, expr);
        case "yearmonth":
            return parseYearmonthField(field, expr);
        case "list":
            return parseListField(field, expr);
        case "array":
            return parseArrayField(field, expr);
        case "geopoint":
            return parseGeopointField(field, expr);
        case "object":
            return parseObjectField(field, expr);
        case "geojson":
            return parseGeojsonField(field, expr);
        case "duration":
            return parseDurationField(field, expr);
        default:
            return expr;
    }
}
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