[TMA 236] Comments PR (#64)

* Added comments count and retrieve comments

* Working draft

* The one before cleanup

* Finally

* Added time icon and major refactoring

* Small fix for social media taggs

* Addressed review comments

2 files changed, 34 insertions, 0 deletions

diff --git a/src/utils/index.ts b/src/utils/index.ts
index 5bc168e3..a7e45979 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,2 +1,3 @@
 export * from './screenDimensions';
 export * from './statusBarHeight';
+export * from './moments';
diff --git a/src/utils/moments.ts b/src/utils/moments.ts
new file mode 100644
index 00000000..0f8021cb
--- /dev/null
+++ b/src/utils/moments.ts
@@ -0,0 +1,33 @@
+import moment from 'moment';
+
+//A util that calculates the difference between a given time and current time
+//Returns the difference in the largest possible unit of time (days > hours > minutes > seconds)
+
+export const getTimePosted = (date_time: string) => {
+  const datePosted = moment(date_time);
+  const now = moment();
+  var time = date_time;
+  var difference = now.diff(datePosted, 'seconds');
+
+  //Creating elapsedTime string to display to user
+  // 0 to less than 1 minute
+  if (difference < 60) {
+    time = difference + ' seconds';
+  }
+  // 1 minute to less than 1 hour
+  else if (difference >= 60 && difference < 60 * 60) {
+    difference = now.diff(datePosted, 'minutes');
+    time = difference + (difference === 1 ? ' minute' : ' minutes');
+  }
+  //1 hour to less than 1 day
+  else if (difference >= 60 * 60 && difference < 24 * 60 * 60) {
+    difference = now.diff(datePosted, 'hours');
+    time = difference + (difference === 1 ? ' hour' : ' hours');
+  }
+  //1 day to less than 7 days
+  else if (difference >= 24 * 60 * 60 && difference < 7 * 24 * 60 * 60) {
+    difference = now.diff(datePosted, 'days');
+    time = difference + (difference === 1 ? ' day' : ' days');
+  }
+  return time;
+};