Swiping to previous dates works for daily readings (not for their bible texts)

1 files changed, 24 insertions, 0 deletions

diff --git a/app/src/main/java/com/camilstaps/common/Date.java b/app/src/main/java/com/camilstaps/common/Date.java
index 94a306d..c01cc0d 100644
--- a/app/src/main/java/com/camilstaps/common/Date.java
+++ b/app/src/main/java/com/camilstaps/common/Date.java
@@ -66,6 +66,10 @@ public class Date implements Comparable<Date> {
         year += n;
     }
 
+    public void subtractYears(int n) {
+        year -= n;
+    }
+
     public void addMonths(int n) {
         for (int i = 0; i < n; i++) {
             month++;
@@ -76,6 +80,16 @@ public class Date implements Comparable<Date> {
         }
     }
 
+    public void subtractMonths(int n) {
+        for (int i = 0; i < n; i++) {
+            month--;
+            if (month <= 0) {
+                month = 12;
+                subtractYears(1);
+            }
+        }
+    }
+
     public void addDays(int n) {
         for (int i = 0; i < n; i++) {
             day++;
@@ -86,6 +100,16 @@ public class Date implements Comparable<Date> {
         }
     }
 
+    public void subtractDays(int n) {
+        for (int i = 0; i < n; i++) {
+            day--;
+            if (day <= 0) {
+                month--;
+                day = daysOfMonth();
+            }
+        }
+    }
+
     public boolean equals(Date date) {
         return year == date.year && month == date.month && day == date.day;
     }