1 files changed, 39 insertions, 0 deletions

diff --git a/client/src/app/shared/shared-main/angular/from-now.pipe.ts b/client/src/app/shared/shared-main/angular/from-now.pipe.ts
new file mode 100644
index 000000000..9851468ee
--- /dev/null
+++ b/client/src/app/shared/shared-main/angular/from-now.pipe.ts
@@ -0,0 +1,39 @@
+import { Pipe, PipeTransform } from '@angular/core'
+import { I18n } from '@ngx-translate/i18n-polyfill'
+
+// Thanks: https://stackoverflow.com/questions/3177836/how-to-format-time-since-xxx-e-g-4-minutes-ago-similar-to-stack-exchange-site
+@Pipe({ name: 'myFromNow' })
+export class FromNowPipe implements PipeTransform {
+
+  constructor (private i18n: I18n) { }
+
+  transform (arg: number | Date | string) {
+    const argDate = new Date(arg)
+    const seconds = Math.floor((Date.now() - argDate.getTime()) / 1000)
+
+    let interval = Math.floor(seconds / 31536000)
+    if (interval > 1) return this.i18n('{{interval}} years ago', { interval })
+    if (interval === 1) return this.i18n('{{interval}} year ago', { interval })
+
+    interval = Math.floor(seconds / 2592000)
+    if (interval > 1) return this.i18n('{{interval}} months ago', { interval })
+    if (interval === 1) return this.i18n('{{interval}} month ago', { interval })
+
+    interval = Math.floor(seconds / 604800)
+    if (interval > 1) return this.i18n('{{interval}} weeks ago', { interval })
+    if (interval === 1) return this.i18n('{{interval}} week ago', { interval })
+
+    interval = Math.floor(seconds / 86400)
+    if (interval > 1) return this.i18n('{{interval}} days ago', { interval })
+    if (interval === 1) return this.i18n('{{interval}} day ago', { interval })
+
+    interval = Math.floor(seconds / 3600)
+    if (interval > 1) return this.i18n('{{interval}} hours ago', { interval })
+    if (interval === 1) return this.i18n('{{interval}} hour ago', { interval })
+
+    interval = Math.floor(seconds / 60)
+    if (interval >= 1) return this.i18n('{{interval}} min ago', { interval })
+
+    return this.i18n('just now')
+  }
+}