data: duration utility

2 files changed, 12 insertions, 6 deletions

diff --git a/src/data/things/thing.js b/src/data/things/thing.js
index 0484b589..169fc1ca 100644
--- a/src/data/things/thing.js
+++ b/src/data/things/thing.js
@@ -27,6 +27,7 @@ import {
   isDate,
   isDimensions,
   isDirectory,
+  isDuration,
   isFileExtension,
   isName,
   isString,
@@ -132,6 +133,15 @@ export function dimensions() {
   };
 }
 
+// Duration! This is a number of seconds, possibly floating point, always
+// at minimum zero.
+export function duration() {
+  return {
+    flags: {update: true, expose: true},
+    update: {validate: isDuration},
+  };
+}
+
 // Straightforward flag descriptor for a variety of property purposes.
 // Provide a default value, true or false!
 export function flag(defaultValue = false) {
diff --git a/src/data/things/track.js b/src/data/things/track.js
index 0cd39dca..53798cda 100644
--- a/src/data/things/track.js
+++ b/src/data/things/track.js
@@ -19,7 +19,6 @@ import {
   isColor,
   isContributionList,
   isDate,
-  isDuration,
   isFileExtension,
 } from '#validators';
 
@@ -31,6 +30,7 @@ import Thing, {
   commentatorArtists,
   contributionList,
   directory,
+  duration,
   flag,
   name,
   referenceList,
@@ -54,11 +54,7 @@ export class Track extends Thing {
     name: name('Unnamed Track'),
     directory: directory(),
 
-    duration: {
-      flags: {update: true, expose: true},
-      update: {validate: isDuration},
-    },
-
+    duration: duration(),
     urls: urls(),
     dateFirstReleased: simpleDate(),