Add popover

app/assets/javascripts/shared/popover.js

+export default class Popover {
+  constructor(trigger, content) {
+    this.isOpen = false;
+
+    this.$popover = $(trigger).popover({
+      content,
+      html: true,
+      placement: 'bottom',
+      trigger: 'manual',
+    });
+  }
+
+  init() {
+    this.registerClickOpenListener();
+  }
+
+  openPopover() {
+    if (this.isOpen) return;
+
+    this.$popover.popover('show');
+    this.$popover.one('shown.bs.popover', this.enableClose.bind(this));
+    this.isOpen = true;
+  }
+
+  closePopover() {
+    if (!this.isOpen) return;
+
+    this.$popover.popover('hide');
+    this.disableClose();
+    this.isOpen = false;
+  }
+
+  closePopoverClick(event) {
+    const $target = $(event.target);
+
+    if ($target.is(this.$popover) ||
+      $target.is('.popover') ||
+      $target.parents('.popover').length > 0) return;
+
+    this.closePopover();
+  }
+
+  closePopoverMouseleave() {
+    setTimeout(() => {
+      if (this.$popover.is(':hover') ||
+        (this.$popover.siblings('.popover').length > 0 &&
+        this.$popover.siblings('.popover').is(':hover'))) return;
+
+      this.closePopover();
+    }, 1500);
+  }
+
+  registerClickOpenListener() {
+    this.$popover.on('click.glPopover.open', this.openPopover.bind(this));
+  }
+
+  registerClickCloseListener() {
+    $(document.body).on('click.glPopover.close', this.closePopoverClick.bind(this));
+  }
+
+  registerMouseleaveCloseListener() {
+    this.$popover.on('mouseleave.glPopover.close', this.closePopoverMouseleave.bind(this));
+    this.$popover.siblings('.popover').on('mouseleave.glPopover.close', this.closePopoverMouseleave.bind(this));
+  }
+
+  destroyMouseleaveCloseListener() {
+    this.$popover.off('mouseleave.glPopover.close');
+    this.$popover.siblings('.popover').on('mouseleave.glPopover.close');
+  }
+
+  enableClose() {
+    this.registerClickCloseListener();
+    this.registerMouseleaveCloseListener();
+  }
+
+  disableClose() {
+    Popover.destroyClickCloseListener();
+    this.destroyMouseleaveCloseListener();
+  }
+
+  static destroyClickCloseListener() {
+    $(document.body).off('click.glPopover.close');
+  }
+}