Initial Commit

node_modules/@grpc/grpc-js/src/deadline.ts

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+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+export type Deadline = Date | number;
+
+export function minDeadline(...deadlineList: Deadline[]): Deadline {
+  let minValue = Infinity;
+  for (const deadline of deadlineList) {
+    const deadlineMsecs =
+      deadline instanceof Date ? deadline.getTime() : deadline;
+    if (deadlineMsecs < minValue) {
+      minValue = deadlineMsecs;
+    }
+  }
+  return minValue;
+}
+
+const units: Array<[string, number]> = [
+  ['m', 1],
+  ['S', 1000],
+  ['M', 60 * 1000],
+  ['H', 60 * 60 * 1000],
+];
+
+export function getDeadlineTimeoutString(deadline: Deadline) {
+  const now = new Date().getTime();
+  if (deadline instanceof Date) {
+    deadline = deadline.getTime();
+  }
+  const timeoutMs = Math.max(deadline - now, 0);
+  for (const [unit, factor] of units) {
+    const amount = timeoutMs / factor;
+    if (amount < 1e8) {
+      return String(Math.ceil(amount)) + unit;
+    }
+  }
+  throw new Error('Deadline is too far in the future');
+}
+
+/**
+ * See https://nodejs.org/api/timers.html#settimeoutcallback-delay-args
+ * In particular, "When delay is larger than 2147483647 or less than 1, the
+ * delay will be set to 1. Non-integer delays are truncated to an integer."
+ * This number of milliseconds is almost 25 days.
+ */
+const MAX_TIMEOUT_TIME = 2147483647;
+
+/**
+ * Get the timeout value that should be passed to setTimeout now for the timer
+ * to end at the deadline. For any deadline before now, the timer should end
+ * immediately, represented by a value of 0. For any deadline more than
+ * MAX_TIMEOUT_TIME milliseconds in the future, a timer cannot be set that will
+ * end at that time, so it is treated as infinitely far in the future.
+ * @param deadline
+ * @returns
+ */
+export function getRelativeTimeout(deadline: Deadline) {
+  const deadlineMs = deadline instanceof Date ? deadline.getTime() : deadline;
+  const now = new Date().getTime();
+  const timeout = deadlineMs - now;
+  if (timeout < 0) {
+    return 0;
+  } else if (timeout > MAX_TIMEOUT_TIME) {
+    return Infinity;
+  } else {
+    return timeout;
+  }
+}
+
+export function deadlineToString(deadline: Deadline): string {
+  if (deadline instanceof Date) {
+    return deadline.toISOString();
+  } else {
+    const dateDeadline = new Date(deadline);
+    if (Number.isNaN(dateDeadline.getTime())) {
+      return '' + deadline;
+    } else {
+      return dateDeadline.toISOString();
+    }
+  }
+}