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-rw-r--r--src/content/dependencies/generateRelativeDatetimestamp.js58
1 files changed, 58 insertions, 0 deletions
diff --git a/src/content/dependencies/generateRelativeDatetimestamp.js b/src/content/dependencies/generateRelativeDatetimestamp.js
new file mode 100644
index 00000000..f0417594
--- /dev/null
+++ b/src/content/dependencies/generateRelativeDatetimestamp.js
@@ -0,0 +1,58 @@
+export default {
+  contentDependencies: [
+    'generateAbsoluteDatetimestamp',
+    'generateDatetimestampTemplate',
+  ],
+
+  extraDependencies: ['html', 'language'],
+
+  data: (currentDate, referenceDate) =>
+    (currentDate.getTime() === referenceDate.getTime()
+      ? {equal: true, date: currentDate}
+      : {equal: false, currentDate, referenceDate}),
+
+  relations: (relation, currentDate) =>
+    ({template: relation('generateDatetimestampTemplate'),
+      fallback: relation('generateAbsoluteDatetimestamp', currentDate)}),
+
+  slots: {
+    style: {
+      validate: v => v.is('full', 'year'),
+      default: 'full',
+    },
+
+    tooltip: {
+      type: 'boolean',
+      default: false,
+    },
+  },
+
+  generate(data, relations, slots, {language}) {
+    if (data.comparison === 'equal') {
+      return relations.fallback.slots({
+        style: slots.style,
+        tooltip: slots.tooltip,
+      });
+    }
+
+    return relations.template.slots({
+      mainContent:
+        (slots.style === 'full'
+          ? language.formatDate(data.currentDate)
+       : slots.style === 'year'
+          ? data.currentDate.getFullYear().toString()
+          : null),
+
+      tooltipContent:
+        slots.tooltip &&
+          language.formatRelativeDate(data.currentDate, data.referenceDate, {
+            considerRoundingDays: true,
+            approximate: true,
+            absolute: true,
+          }),
+
+      datetime:
+        data.currentDate.toISOString(),
+    });
+  },
+};