Range types support

[dankochetov]

https://www.postgresql.org/docs/current/rangetypes.html

[nick-kang]

Here's an implementation using customType. It draws inspiration from how Postgraphile implements ranges.

import { Range, RANGE_LB_INC, parse as rangeParse, serialize as rangeSerialize, } from 'postgres-range'

interface TimeRangeInput {
  endMs: number
  startMs: number
}

export class Int4Range {
  constructor(public readonly range: Range<number>) {}

  get start(): RangeBound<number> | null {
    return this.range.lower != null
      ? {
          value: this.range.lower,
          inclusive: this.range.isLowerBoundClosed(),
        }
      : null
  }

  get end(): RangeBound<number> | null {
    return this.range.upper != null
      ? {
          value: this.range.upper,
          inclusive: this.range.isUpperBoundClosed(),
        }
      : null
  }

  static fromInput(input: TimeRangeInput): Int4Range {
    const range = new Range<number>(
      input.startMs,
      input.endMs,
      RANGE_LB_INC,
    )

    return new Int4Range(range)
  }
}

const int4range = customType<{
  data: Int4Range
}>({
  dataType: () => 'int4range',
  fromDriver: (value: unknown): Int4Range => {
    if (typeof value !== 'string') {
      throw new Error('Expected string')
    }

    const parsed = rangeParse(value, (val) => parseInt(val, 10))
    return new Int4Range(parsed)
  },
  toDriver: (value: Int4Range): string => rangeSerialize(value.range),
})

[NeoFoxxo]

is this still being worked on?