feat: Add date array support

decode.ts

@@ -8,6 +8,7 @@ import {
   decodeBytea,
   decodeByteaArray,
   decodeDate,
+  decodeDateArray,
   decodeDatetime,
   decodeDatetimeArray,
   decodeInt,
@@ -103,6 +104,8 @@ function decodeText(value: Uint8Array, typeOid: number): any {
       return decodeByteaArray(strValue);
     case Oid.date:
       return decodeDate(strValue);
+    case Oid.date_array:
+      return decodeDateArray(strValue);
     case Oid.int8:
       return decodeBigint(strValue);
     case Oid.int8_array:

oid.ts

@@ -147,7 +147,8 @@ export const Oid = {
   timestamp: 1114,
   // deno-lint-ignore camelcase
   timestamp_array: 1115,
-  _date: 1182,
+  // deno-lint-ignore camelcase
+  date_array: 1182,
   // deno-lint-ignore camelcase
   time_array: 1183,
   timestamptz: 1184,

query/decoders.ts

@@ -80,7 +80,15 @@ function decodeByteaHex(byteaStr: string): Uint8Array {
   return bytes;
 }
 
-export function decodeDate(dateStr: string): Date {
+export function decodeDate(dateStr: string): Date | number {
+  // there are special `infinity` and `-infinity`
+  // cases representing out-of-range dates
+  if (dateStr === "infinity") {
+    return Number(Infinity);
+  } else if (dateStr === "-infinity") {
+    return Number(-Infinity);
+  }
+
   const matches = DATE_RE.exec(dateStr);
 
   if (!matches) {
@@ -100,20 +108,16 @@ export function decodeDate(dateStr: string): Date {
   return date;
 }
 
+export function decodeDateArray(value: string) {
+  return parseArray(value, decodeDate);
+}
+
 export function decodeDatetime(dateStr: string): number | Date {
   /**
    * Postgres uses ISO 8601 style date output by default:
    * 1997-12-17 07:37:16-08
    */
 
-  // there are special `infinity` and `-infinity`
-  // cases representing out-of-range dates
-  if (dateStr === "infinity") {
-    return Number(Infinity);
-  } else if (dateStr === "-infinity") {
-    return Number(-Infinity);
-  }
-
   const matches = DATETIME_RE.exec(dateStr);
 
   if (!matches) {

test_deps.ts

@@ -9,3 +9,7 @@ export {
   decode as decodeBase64,
   encode as encodeBase64,
 } from "https://deno.land/[email protected]/encoding/base64.ts";
+export {
+  format as formatDate,
+  parse as parseDate,
+} from "https://deno.land/[email protected]/datetime/mod.ts";

tests/data_types.ts

@@ -1,4 +1,10 @@
-import { assertEquals, decodeBase64, encodeBase64 } from "../test_deps.ts";
+import {
+  assertEquals,
+  decodeBase64,
+  encodeBase64,
+  formatDate,
+  parseDate,
+} from "../test_deps.ts";
 import { Client } from "../mod.ts";
 import TEST_CONNECTION_PARAMS from "./config.ts";
 import { getTestClient } from "./helpers.ts";
@@ -674,3 +680,28 @@ testClient(async function tidArray() {
 
   assertEquals(result.rows[0][0], [[4681n, 1869n], [0n, 17476n]]);
 });
+
+testClient(async function date() {
+  const date = "2020-01-01";
+
+  const result = await CLIENT.queryArray<[Timestamp, Timestamp]>(
+    "SELECT $1::DATE, 'Infinity'::Date",
+    date,
+  );
+
+  assertEquals(result.rows[0], [parseDate(date, "yyyy-MM-dd"), Infinity]);
+});
+
+testClient(async function dateArray() {
+  const dates = ["2020-01-01", formatDate(new Date(), "yyyy-MM-dd")];
+
+  const result = await CLIENT.queryArray<[Timestamp, Timestamp]>(
+    "SELECT ARRAY[$1::DATE, $2]",
+    ...dates,
+  );
+
+  assertEquals(
+    result.rows[0][0],
+    dates.map((date) => parseDate(date, "yyyy-MM-dd")),
+  );
+});