From b9b1dd73f58c3ee66161fd316299c0a6772b0a0d Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Tue, 21 Feb 2023 01:08:07 +0100
Subject: taler-util: parse duration strings

---
 packages/taler-util/src/time.ts | 43 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

(limited to 'packages/taler-util/src/time.ts')

diff --git a/packages/taler-util/src/time.ts b/packages/taler-util/src/time.ts
index 21963ee6b..8b4f4cac3 100644
--- a/packages/taler-util/src/time.ts
+++ b/packages/taler-util/src/time.ts
@@ -113,6 +113,49 @@ export namespace Duration {
     return { d_ms: deadline.t_ms - now.t_ms };
   }
 
+  export function fromPrettyString(s: string): Duration {
+    let dMs = 0;
+    let currentNum = "";
+    let parsingNum = true;
+    for (let i = 0; i < s.length; i++) {
+      const cc = s.charCodeAt(i);
+      if (cc >= "0".charCodeAt(0) && cc <= "9".charCodeAt(0)) {
+        if (!parsingNum) {
+          throw Error("invalid duration, unexpected number");
+        }
+        currentNum += s[i];
+        continue;
+      }
+      if (s[i] == " ") {
+        if (currentNum != "") {
+          parsingNum = false;
+        }
+        continue;
+      }
+
+      if (currentNum == "") {
+        throw Error("invalid duration, missing number");
+      }
+
+      if (s[i] === "s") {
+        dMs += 1000 * Number.parseInt(currentNum, 10);
+      } else if (s[i] === "m") {
+        dMs += 60 * 1000 * Number.parseInt(currentNum, 10);
+      } else if (s[i] === "h") {
+        dMs += 60 * 60 * 1000 * Number.parseInt(currentNum, 10);
+      } else if (s[i] === "d") {
+        dMs += 24 * 60 * 60 * 1000 * Number.parseInt(currentNum, 10);
+      } else {
+        throw Error("invalid duration, unsupported unit");
+      }
+      currentNum = "";
+      parsingNum = true;
+    }
+    return {
+      d_ms: dMs,
+    };
+  }
+
   export function max(d1: Duration, d2: Duration): Duration {
     return durationMax(d1, d2);
   }
-- 
cgit v1.2.3