Add support for querying yesterday's stats

cv

@@ -6,6 +6,7 @@ then
 else
 	# This is a compatibility mode and not well-supported.
 	date=$(date +"%Y-%m-%d")
+	ydate=$(date -d yesterday +"%Y-%m-%d")
 	show(){
 		echo -e "\033[1;36m> ${@} \033[0m"
 	}
@@ -31,16 +32,32 @@ get(){
 		cat $data/$date-$country
 	fi
 }
+yget(){
+	date=$ydate
+	get
+}
 result(){
 	echo "Total:  $(get | jq -r '.cases')"
 	echo "Active: $(get | jq -r '.active')"
-	echo "Today:  $(get | jq -r '.todayCases')"
+	echo "New:    $(get | jq -r '.todayCases')"
 	echo "Tests:  $(get | jq -r '.tests')"
+	show "Yesterday's stats:"
+	echo "New:    $(yget | jq -r '.todayCases')"
 	if [ $(get | jq -r '.todayCases') == "0" ]
 	then
 		show "Seems like the cases today are not yet updated."
 		show "The data file will be removed. Please query again later."
 		ex "rm $data/$date-$country"
+	elif [ $(get | jq -r '.todayCases') == $(yget | jq -r '.todayCases') ]
+	then
+		show "Seems like the stats are the same as yesterday."
+		show "This could be normal but may mean that the data file is still yesterday's."
+		show "Do you want to remove it? (y/n)"
+		read answer
+		if [ "$answer" == "y" ]
+		then
+			ex "rm $data/$date-$country"
+		fi
 	fi
 }