From ecda368d338a7fae526ff614b51c99d39b6d394b Mon Sep 17 00:00:00 2001
From: Hongbo Wu <hongbo@omnivore.app>
Date: Thu, 28 Sep 2023 15:15:20 +0800
Subject: [PATCH 1/2] fix: add a lambda function in the template to allow users
 to format date

---
 src/settings/template.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/settings/template.ts b/src/settings/template.ts
index 99ed2b7..c9b9608 100644
--- a/src/settings/template.ts
+++ b/src/settings/template.ts
@@ -118,10 +118,21 @@ function upperCaseFirst() {
   };
 }
 
+function formatDateFunc() {
+  return function (text: string, render: (text: string) => string) {
+    // get the date and format from the text
+    const [dateVariable, format] = text.split(",", 2);
+    const date = render(dateVariable);
+    // format the date
+    return formatDate(date, format);
+  };
+}
+
 const functionMap: FunctionMap = {
   lowerCase,
   upperCase,
   upperCaseFirst,
+  formatDate: formatDateFunc,
 };
 
 export const renderFilename = (

From 74b2114a6599dcf9375aa788233a7ab4c1aad0aa Mon Sep 17 00:00:00 2001
From: Hongbo Wu <hongbo@omnivore.app>
Date: Fri, 29 Sep 2023 10:59:28 +0800
Subject: [PATCH 2/2] return empty string if date variable is undefined in the
 formatDate function

---
 src/settings/template.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/settings/template.ts b/src/settings/template.ts
index c9b9608..c49b87b 100644
--- a/src/settings/template.ts
+++ b/src/settings/template.ts
@@ -123,6 +123,9 @@ function formatDateFunc() {
     // get the date and format from the text
     const [dateVariable, format] = text.split(",", 2);
     const date = render(dateVariable);
+    if (!date) {
+      return "";
+    }
     // format the date
     return formatDate(date, format);
   };