Add 'frontend/' from commit 'c070c0315d66a44154ab7d9f9ea6c211a15f4dba'

git-subtree-dir: frontend
git-subtree-mainline: 205a3bd14b
git-subtree-split: c070c0315d

frontend/src/internal_time_ago.js

@@ -0,0 +1,68 @@
+import {useI18n} from "vue-i18n";
+
+export function time_ago(time) {
+    const time_date = new Date(time)
+    const now_date = new Date(Date.now())
+    const ago = now_date - time_date
+    return internal_time_ago(ago)
+}
+
+function internal_time_ago(time) {
+
+    switch (typeof time) {
+        case 'number':
+            break;
+        case 'string':
+            time = +new Date(time);
+            break;
+        case 'object':
+            if (time.constructor === Date) time = time.getTime();
+            break;
+        default:
+            time = +new Date();
+    }
+    
+    const {t} = useI18n();
+       
+    const time_formats = [
+        [60, t('time.seconds'), 1], // 60
+        [120, t('time.1minuteago'), t('time.1minutefromnow')], // 60*2
+        [3600, t('time.minutes'), 60], // 60*60, 60
+        [7200, t('time.1hourago'), t('time.1hourfromnow')], // 60*60*2
+        [86400, t('time.hours'), 3600], // 60*60*24, 60*60
+        [172800, t('time.yesterday'), t('time.tomorrow')], // 60*60*24*2
+        [604800, t('time.days'), 86400], // 60*60*24*7, 60*60*24
+        [1209600, t('time.lastweek'), t('time.nextweek')], // 60*60*24*7*4*2
+        [2419200, t('time.weeks'), 604800], // 60*60*24*7*4, 60*60*24*7
+        [4838400, t('time.lastmonth'), t('time.nextmonth')], // 60*60*24*7*4*2
+        [29030400, t('time.months'), 2419200], // 60*60*24*7*4*12, 60*60*24*7*4
+        [58060800, t('time.lastyear'), t('time.nextyear')], // 60*60*24*7*4*12*2
+        [2903040000, t('time.years'), 29030400], // 60*60*24*7*4*12*100, 60*60*24*7*4*12
+        [5806080000, t('time.lastcentury'), t('time.nextcentury')], // 60*60*24*7*4*12*100*2
+        [58060800000, t('time.centuries'), 2903040000] // 60*60*24*7*4*12*100*20, 60*60*24*7*4*12*100
+    ];
+
+    let seconds = time / 1000
+
+    let token = t('time.ago')
+    let list_choice = 1
+
+    if (seconds === 0) {
+        return 'Just now'
+    }
+
+    if (seconds < 0) {
+        seconds = Math.abs(seconds);
+        token = 'from now';
+        list_choice = 2;
+    }
+    let i = 0, format;
+    while (format = time_formats[i++])
+        if (seconds < format[0]) {
+            if (typeof format[2] == 'string')
+                return format[list_choice];
+            else
+                return Math.floor(seconds / format[2]) + ' ' + format[1] + ' ' + token;
+        }
+    return time;
+}