From bd077e6500edefdfc2f0742ff3eeb02504768acf Mon Sep 17 00:00:00 2001
From: guru_sainath <gurusainath007@gmail.com>
Date: Thu, 21 Sep 2023 15:39:45 +0530
Subject: [PATCH] Implemented nested issues in the sub issues section in issue
 detail page (#2233)

* feat: subissues infinte level

* feat: updated UI for sub issues

* feat: subissues new ui and nested sub issues in issue detail

* chore: removed repeated code
---
 web/components/issues/delete-issue-modal.tsx  |   4 +-
 web/components/issues/index.ts                |   1 -
 web/components/issues/main-content.tsx        |   4 +-
 web/components/issues/sub-issues-list.tsx     | 251 ----------------
 web/components/issues/sub-issues/index.ts     |   1 +
 web/components/issues/sub-issues/issue.tsx    | 171 +++++++++++
 .../issues/sub-issues/issues-list.tsx         |  84 ++++++
 .../issues/sub-issues/progressbar.tsx         |  25 ++
 .../issues/sub-issues/properties.tsx          | 204 +++++++++++++
 web/components/issues/sub-issues/root.tsx     | 283 ++++++++++++++++++
 web/components/project/members-select.tsx     |   2 +-
 11 files changed, 774 insertions(+), 256 deletions(-)
 delete mode 100644 web/components/issues/sub-issues-list.tsx
 create mode 100644 web/components/issues/sub-issues/index.ts
 create mode 100644 web/components/issues/sub-issues/issue.tsx
 create mode 100644 web/components/issues/sub-issues/issues-list.tsx
 create mode 100644 web/components/issues/sub-issues/progressbar.tsx
 create mode 100644 web/components/issues/sub-issues/properties.tsx
 create mode 100644 web/components/issues/sub-issues/root.tsx

diff --git a/web/components/issues/delete-issue-modal.tsx b/web/components/issues/delete-issue-modal.tsx
index d76e5ddd2..62fc04723 100644
--- a/web/components/issues/delete-issue-modal.tsx
+++ b/web/components/issues/delete-issue-modal.tsx
@@ -35,6 +35,7 @@ type Props = {
   data: IIssue | null;
   user: ICurrentUserResponse | undefined;
   onSubmit?: () => Promise<void>;
+  redirection?: boolean;
 };
 
 export const DeleteIssueModal: React.FC<Props> = ({
@@ -43,6 +44,7 @@ export const DeleteIssueModal: React.FC<Props> = ({
   data,
   user,
   onSubmit,
+  redirection = true,
 }) => {
   const [isDeleteLoading, setIsDeleteLoading] = useState(false);
 
@@ -132,7 +134,7 @@ export const DeleteIssueModal: React.FC<Props> = ({
           message: "Issue deleted successfully",
         });
 
-        if (issueId) router.back();
+        if (issueId && redirection) router.back();
       })
       .catch((error) => {
         console.log(error);
diff --git a/web/components/issues/index.ts b/web/components/issues/index.ts
index 1c51031f3..6b83e7ef4 100644
--- a/web/components/issues/index.ts
+++ b/web/components/issues/index.ts
@@ -12,7 +12,6 @@ export * from "./main-content";
 export * from "./modal";
 export * from "./parent-issues-list-modal";
 export * from "./sidebar";
-export * from "./sub-issues-list";
 export * from "./label";
 export * from "./issue-reaction";
 export * from "./peek-overview";
diff --git a/web/components/issues/main-content.tsx b/web/components/issues/main-content.tsx
index b7b154ce2..5e14ba432 100644
--- a/web/components/issues/main-content.tsx
+++ b/web/components/issues/main-content.tsx
@@ -18,9 +18,9 @@ import {
   IssueAttachmentUpload,
   IssueAttachments,
   IssueDescriptionForm,
-  SubIssuesList,
   IssueReaction,
 } from "components/issues";
+import { SubIssuesRoot } from "./sub-issues";
 // ui
 import { CustomMenu } from "components/ui";
 // icons
@@ -206,7 +206,7 @@ export const IssueMainContent: React.FC<Props> = ({
         <IssueReaction workspaceSlug={workspaceSlug} issueId={issueId} projectId={projectId} />
 
         <div className="mt-2 space-y-2">
-          <SubIssuesList parentIssue={issueDetails} user={user} disabled={uneditable} />
+          <SubIssuesRoot parentIssue={issueDetails} user={user} editable={uneditable} />
         </div>
       </div>
       <div className="flex flex-col gap-3 py-3">
diff --git a/web/components/issues/sub-issues-list.tsx b/web/components/issues/sub-issues-list.tsx
deleted file mode 100644
index 9ba920ff5..000000000
--- a/web/components/issues/sub-issues-list.tsx
+++ /dev/null
@@ -1,251 +0,0 @@
-import { FC, useState } from "react";
-
-import Link from "next/link";
-import { useRouter } from "next/router";
-
-import useSWR, { mutate } from "swr";
-
-// headless ui
-import { Disclosure, Transition } from "@headlessui/react";
-// services
-import issuesService from "services/issues.service";
-// contexts
-import { useProjectMyMembership } from "contexts/project-member.context";
-// components
-import { ExistingIssuesListModal } from "components/core";
-import { CreateUpdateIssueModal } from "components/issues";
-// ui
-import { CustomMenu } from "components/ui";
-// icons
-import { ChevronRightIcon, PlusIcon, XMarkIcon } from "@heroicons/react/24/outline";
-// types
-import { ICurrentUserResponse, IIssue, ISearchIssueResponse, ISubIssueResponse } from "types";
-// fetch-keys
-import { SUB_ISSUES } from "constants/fetch-keys";
-
-type Props = {
-  parentIssue: IIssue;
-  user: ICurrentUserResponse | undefined;
-  disabled?: boolean;
-};
-
-export const SubIssuesList: FC<Props> = ({ parentIssue, user, disabled = false }) => {
-  // states
-  const [createIssueModal, setCreateIssueModal] = useState(false);
-  const [subIssuesListModal, setSubIssuesListModal] = useState(false);
-  const [preloadedData, setPreloadedData] = useState<Partial<IIssue> | null>(null);
-
-  const router = useRouter();
-  const { workspaceSlug } = router.query;
-
-  const { memberRole } = useProjectMyMembership();
-
-  const { data: subIssuesResponse } = useSWR(
-    workspaceSlug && parentIssue ? SUB_ISSUES(parentIssue.id) : null,
-    workspaceSlug && parentIssue
-      ? () => issuesService.subIssues(workspaceSlug as string, parentIssue.project, parentIssue.id)
-      : null
-  );
-
-  const addAsSubIssue = async (data: ISearchIssueResponse[]) => {
-    if (!workspaceSlug || !parentIssue) return;
-
-    const payload = {
-      sub_issue_ids: data.map((i) => i.id),
-    };
-
-    await issuesService
-      .addSubIssues(workspaceSlug as string, parentIssue.project, parentIssue.id, payload)
-      .finally(() => mutate(SUB_ISSUES(parentIssue.id)));
-  };
-
-  const handleSubIssueRemove = (issue: IIssue) => {
-    if (!workspaceSlug || !parentIssue) return;
-
-    mutate<ISubIssueResponse>(
-      SUB_ISSUES(parentIssue.id),
-      (prevData) => {
-        if (!prevData) return prevData;
-
-        const stateDistribution = { ...prevData.state_distribution };
-
-        const issueGroup = issue.state_detail.group;
-        stateDistribution[issueGroup] = stateDistribution[issueGroup] - 1;
-
-        return {
-          state_distribution: stateDistribution,
-          sub_issues: prevData.sub_issues.filter((i) => i.id !== issue.id),
-        };
-      },
-      false
-    );
-
-    issuesService
-      .patchIssue(workspaceSlug.toString(), issue.project, issue.id, { parent: null }, user)
-      .finally(() => mutate(SUB_ISSUES(parentIssue.id)));
-  };
-
-  const handleCreateIssueModal = () => {
-    setCreateIssueModal(true);
-
-    setPreloadedData({
-      parent: parentIssue.id,
-    });
-  };
-
-  const completedSubIssue = subIssuesResponse?.state_distribution.completed ?? 0;
-  const cancelledSubIssue = subIssuesResponse?.state_distribution.cancelled ?? 0;
-
-  const totalCompletedSubIssues = completedSubIssue + cancelledSubIssue;
-
-  const totalSubIssues = subIssuesResponse ? subIssuesResponse.sub_issues.length : 0;
-
-  const completionPercentage = (totalCompletedSubIssues / totalSubIssues) * 100;
-
-  const isNotAllowed = memberRole.isGuest || memberRole.isViewer || disabled;
-
-  return (
-    <>
-      <CreateUpdateIssueModal
-        isOpen={createIssueModal}
-        prePopulateData={{ ...preloadedData }}
-        handleClose={() => setCreateIssueModal(false)}
-      />
-      <ExistingIssuesListModal
-        isOpen={subIssuesListModal}
-        handleClose={() => setSubIssuesListModal(false)}
-        searchParams={{ sub_issue: true, issue_id: parentIssue?.id }}
-        handleOnSubmit={addAsSubIssue}
-        workspaceLevelToggle
-      />
-      {subIssuesResponse && subIssuesResponse.sub_issues.length > 0 ? (
-        <Disclosure defaultOpen={true}>
-          {({ open }) => (
-            <>
-              <div className="flex items-center justify-between">
-                <div className="flex items-center justify-start gap-3 text-custom-text-200">
-                  <Disclosure.Button className="flex items-center gap-1 rounded px-2 py-1 text-xs text-custom-text-100 hover:bg-custom-background-80">
-                    <ChevronRightIcon className={`h-3 w-3 ${open ? "rotate-90" : ""}`} />
-                    Sub-issues{" "}
-                    <span className="ml-1 text-custom-text-200">
-                      {subIssuesResponse.sub_issues.length}
-                    </span>
-                  </Disclosure.Button>
-                  <div className="flex w-60 items-center gap-2">
-                    <div className="bar relative h-1.5 w-full rounded bg-custom-background-80">
-                      <div
-                        className="absolute top-0 left-0 h-1.5 rounded bg-green-500 duration-300"
-                        style={{
-                          width: `${
-                            isNaN(completionPercentage)
-                              ? 0
-                              : completionPercentage > 100
-                              ? 100
-                              : completionPercentage.toFixed(0)
-                          }%`,
-                        }}
-                      />
-                    </div>
-                    <span className="whitespace-nowrap text-xs">
-                      {isNaN(completionPercentage)
-                        ? 0
-                        : completionPercentage > 100
-                        ? 100
-                        : completionPercentage.toFixed(0)}
-                      % Done
-                    </span>
-                  </div>
-                </div>
-
-                {open && !isNotAllowed ? (
-                  <div className="flex items-center">
-                    <button
-                      type="button"
-                      className="flex items-center gap-1 rounded px-2 py-1 text-xs text-custom-text-200 hover:text-custom-text-100 hover:bg-custom-background-80"
-                      onClick={handleCreateIssueModal}
-                    >
-                      <PlusIcon className="h-3 w-3" />
-                      Create new
-                    </button>
-
-                    <CustomMenu ellipsis>
-                      <CustomMenu.MenuItem onClick={() => setSubIssuesListModal(true)}>
-                        Add an existing issue
-                      </CustomMenu.MenuItem>
-                    </CustomMenu>
-                  </div>
-                ) : null}
-              </div>
-              <Transition
-                enter="transition duration-100 ease-out"
-                enterFrom="transform scale-95 opacity-0"
-                enterTo="transform scale-100 opacity-100"
-                leave="transition duration-75 ease-out"
-                leaveFrom="transform scale-100 opacity-100"
-                leaveTo="transform scale-95 opacity-0"
-              >
-                <Disclosure.Panel className="mt-3 flex flex-col gap-y-1">
-                  {subIssuesResponse.sub_issues.map((issue) => (
-                    <Link
-                      key={issue.id}
-                      href={`/${workspaceSlug}/projects/${issue.project}/issues/${issue.id}`}
-                    >
-                      <a className="group flex items-center justify-between gap-2 rounded p-2 hover:bg-custom-background-90">
-                        <div className="flex items-center gap-2 rounded text-xs">
-                          <span
-                            className="block h-1.5 w-1.5 flex-shrink-0 rounded-full"
-                            style={{
-                              backgroundColor: issue.state_detail.color,
-                            }}
-                          />
-                          <span className="flex-shrink-0 text-custom-text-200">
-                            {issue.project_detail.identifier}-{issue.sequence_id}
-                          </span>
-                          <span className="max-w-sm break-words font-medium">{issue.name}</span>
-                        </div>
-
-                        {!isNotAllowed && (
-                          <button
-                            type="button"
-                            className="cursor-pointer opacity-0 group-hover:opacity-100"
-                            onClick={(e) => {
-                              e.preventDefault();
-                              e.stopPropagation();
-                              handleSubIssueRemove(issue);
-                            }}
-                          >
-                            <XMarkIcon className="h-4 w-4 text-custom-text-200 hover:text-custom-text-100" />
-                          </button>
-                        )}
-                      </a>
-                    </Link>
-                  ))}
-                </Disclosure.Panel>
-              </Transition>
-            </>
-          )}
-        </Disclosure>
-      ) : (
-        !isNotAllowed && (
-          <CustomMenu
-            label={
-              <>
-                <PlusIcon className="h-3 w-3" />
-                Add sub-issue
-              </>
-            }
-            buttonClassName="whitespace-nowrap"
-            position="left"
-            noBorder
-            noChevron
-          >
-            <CustomMenu.MenuItem onClick={handleCreateIssueModal}>Create new</CustomMenu.MenuItem>
-            <CustomMenu.MenuItem onClick={() => setSubIssuesListModal(true)}>
-              Add an existing issue
-            </CustomMenu.MenuItem>
-          </CustomMenu>
-        )
-      )}
-    </>
-  );
-};
diff --git a/web/components/issues/sub-issues/index.ts b/web/components/issues/sub-issues/index.ts
new file mode 100644
index 000000000..1efe34c51
--- /dev/null
+++ b/web/components/issues/sub-issues/index.ts
@@ -0,0 +1 @@
+export * from "./root";
diff --git a/web/components/issues/sub-issues/issue.tsx b/web/components/issues/sub-issues/issue.tsx
new file mode 100644
index 000000000..2e3d8acdb
--- /dev/null
+++ b/web/components/issues/sub-issues/issue.tsx
@@ -0,0 +1,171 @@
+import React from "react";
+// next imports
+import Link from "next/link";
+// lucide icons
+import {
+  ChevronDown,
+  ChevronRight,
+  X,
+  Pencil,
+  Trash,
+  Link as LinkIcon,
+  Loader,
+} from "lucide-react";
+// components
+import { SubIssuesRootList } from "./issues-list";
+import { IssueProperty } from "./properties";
+// ui
+import { Tooltip, CustomMenu } from "components/ui";
+
+// types
+import { ICurrentUserResponse, IIssue } from "types";
+
+export interface ISubIssues {
+  workspaceSlug: string;
+  projectId: string;
+  parentIssue: IIssue;
+  issue: any;
+  spacingLeft?: number;
+  user: ICurrentUserResponse | undefined;
+  editable: boolean;
+  removeIssueFromSubIssues: (parentIssueId: string, issue: IIssue) => void;
+  issuesVisibility: string[];
+  handleIssuesVisibility: (issueId: string) => void;
+  copyText: (text: string) => void;
+  handleIssueCrudOperation: (
+    key: "create" | "existing" | "edit" | "delete",
+    issueId: string,
+    issue?: IIssue | null
+  ) => void;
+}
+
+export const SubIssues: React.FC<ISubIssues> = ({
+  workspaceSlug,
+  projectId,
+  parentIssue,
+  issue,
+  spacingLeft = 0,
+  user,
+  editable,
+  removeIssueFromSubIssues,
+  issuesVisibility,
+  handleIssuesVisibility,
+  copyText,
+  handleIssueCrudOperation,
+}) => (
+  <div>
+    {issue && (
+      <div
+        className="relative flex items-center gap-2 py-1 px-2 w-full h-full hover:bg-custom-background-90 group transition-all border-b border-custom-border-100"
+        style={{ paddingLeft: `${spacingLeft}px` }}
+      >
+        <div className="flex-shrink-0 w-[22px] h-[22px]">
+          {issue?.sub_issues_count > 0 && (
+            <>
+              {true ? (
+                <div
+                  className="w-full h-full flex justify-center items-center rounded-sm hover:bg-custom-background-80 transition-all cursor-pointer"
+                  onClick={() => handleIssuesVisibility(issue?.id)}
+                >
+                  {issuesVisibility && issuesVisibility.includes(issue?.id) ? (
+                    <ChevronDown width={14} strokeWidth={2} />
+                  ) : (
+                    <ChevronRight width={14} strokeWidth={2} />
+                  )}
+                </div>
+              ) : (
+                <Loader width={14} strokeWidth={2} className="animate-spin" />
+              )}
+            </>
+          )}
+        </div>
+
+        <Link href={`/${workspaceSlug}/projects/${issue.project}/issues/${issue.id}`}>
+          <a className="w-full flex items-center gap-2">
+            <div
+              className="flex-shrink-0 w-[6px] h-[6px] rounded-full"
+              style={{
+                backgroundColor: issue.state_detail.color,
+              }}
+            />
+            <div className="flex-shrink-0 text-xs text-custom-text-200">
+              {issue.project_detail.identifier}-{issue?.sequence_id}
+            </div>
+            <Tooltip tooltipHeading="Title" tooltipContent={`${issue?.name}`}>
+              <div className="line-clamp-1 text-xs text-custom-text-100">{issue?.name}</div>
+            </Tooltip>
+          </a>
+        </Link>
+
+        <div className="flex-shrink-0 text-sm">
+          <IssueProperty
+            workspaceSlug={workspaceSlug}
+            projectId={projectId}
+            parentIssue={parentIssue}
+            issue={issue}
+            user={user}
+            editable={editable}
+          />
+        </div>
+
+        <div className="flex-shrink-0 text-sm">
+          <CustomMenu width="auto" ellipsis>
+            {editable && (
+              <CustomMenu.MenuItem
+                onClick={() => handleIssueCrudOperation("edit", parentIssue?.id, issue)}
+              >
+                <div className="flex items-center justify-start gap-2">
+                  <Pencil width={14} strokeWidth={2} />
+                  <span>Edit issue</span>
+                </div>
+              </CustomMenu.MenuItem>
+            )}
+
+            {editable && (
+              <CustomMenu.MenuItem
+                onClick={() => handleIssueCrudOperation("delete", parentIssue?.id, issue)}
+              >
+                <div className="flex items-center justify-start gap-2">
+                  <Trash width={14} strokeWidth={2} />
+                  <span>Delete issue</span>
+                </div>
+              </CustomMenu.MenuItem>
+            )}
+
+            <CustomMenu.MenuItem onClick={copyText}>
+              <div className="flex items-center justify-start gap-2">
+                <LinkIcon width={14} strokeWidth={2} />
+                <span>Copy issue link</span>
+              </div>
+            </CustomMenu.MenuItem>
+          </CustomMenu>
+        </div>
+
+        {editable && (
+          <div
+            className="flex-shrink-0 invisible group-hover:visible w-[22px] h-[22px] flex justify-center items-center rounded-sm hover:bg-custom-background-80 transition-all cursor-pointer overflow-hidden"
+            onClick={() => removeIssueFromSubIssues(parentIssue?.id, issue)}
+          >
+            <X width={14} strokeWidth={2} />
+          </div>
+        )}
+      </div>
+    )}
+
+    {issuesVisibility.includes(issue?.id) && issue?.sub_issues_count > 0 && (
+      <SubIssuesRootList
+        workspaceSlug={workspaceSlug}
+        projectId={projectId}
+        parentIssue={issue}
+        spacingLeft={spacingLeft + 22}
+        user={user}
+        editable={editable}
+        removeIssueFromSubIssues={removeIssueFromSubIssues}
+        issuesVisibility={issuesVisibility}
+        handleIssuesVisibility={handleIssuesVisibility}
+        copyText={copyText}
+        handleIssueCrudOperation={handleIssueCrudOperation}
+      />
+    )}
+  </div>
+);
diff --git a/web/components/issues/sub-issues/issues-list.tsx b/web/components/issues/sub-issues/issues-list.tsx
new file mode 100644
index 000000000..45c0b1882
--- /dev/null
+++ b/web/components/issues/sub-issues/issues-list.tsx
@@ -0,0 +1,84 @@
+import React from "react";
+// swr
+import useSWR from "swr";
+// components
+import { SubIssues } from "./issue";
+// types
+import { ICurrentUserResponse, IIssue } from "types";
+// services
+import issuesService from "services/issues.service";
+// fetch keys
+import { SUB_ISSUES } from "constants/fetch-keys";
+
+export interface ISubIssuesRootList {
+  workspaceSlug: string;
+  projectId: string;
+  parentIssue: IIssue;
+  spacingLeft?: number;
+  user: ICurrentUserResponse | undefined;
+  editable: boolean;
+  removeIssueFromSubIssues: (parentIssueId: string, issue: IIssue) => void;
+  issuesVisibility: string[];
+  handleIssuesVisibility: (issueId: string) => void;
+  copyText: (text: string) => void;
+  handleIssueCrudOperation: (
+    key: "create" | "existing" | "edit" | "delete",
+    issueId: string,
+    issue?: IIssue | null
+  ) => void;
+}
+
+export const SubIssuesRootList: React.FC<ISubIssuesRootList> = ({
+  workspaceSlug,
+  projectId,
+  parentIssue,
+  spacingLeft = 10,
+  user,
+  editable,
+  removeIssueFromSubIssues,
+  issuesVisibility,
+  handleIssuesVisibility,
+  copyText,
+  handleIssueCrudOperation,
+}) => {
+  const { data: issues, isLoading } = useSWR(
+    workspaceSlug && projectId && parentIssue && parentIssue?.id
+      ? SUB_ISSUES(parentIssue?.id)
+      : null,
+    workspaceSlug && projectId && parentIssue && parentIssue?.id
+      ? () => issuesService.subIssues(workspaceSlug, projectId, parentIssue.id)
+      : null
+  );
+
+  return (
+    <div className="relative">
+      {issues &&
+        issues.sub_issues &&
+        issues.sub_issues.length > 0 &&
+        issues.sub_issues.map((issue: IIssue) => (
+          <SubIssues
+            key={`${issue?.id}`}
+            workspaceSlug={workspaceSlug}
+            projectId={projectId}
+            parentIssue={parentIssue}
+            issue={issue}
+            spacingLeft={spacingLeft}
+            user={user}
+            editable={editable}
+            removeIssueFromSubIssues={removeIssueFromSubIssues}
+            issuesVisibility={issuesVisibility}
+            handleIssuesVisibility={handleIssuesVisibility}
+            copyText={copyText}
+            handleIssueCrudOperation={handleIssueCrudOperation}
+          />
+        ))}
+
+      <div
+        className={`absolute top-0 bottom-0  ${
+          spacingLeft > 10 ? `border-l border-custom-border-100` : ``
+        }`}
+        style={{ left: `${spacingLeft - 12}px` }}
+      />
+    </div>
+  );
+};
diff --git a/web/components/issues/sub-issues/progressbar.tsx b/web/components/issues/sub-issues/progressbar.tsx
new file mode 100644
index 000000000..368078a3d
--- /dev/null
+++ b/web/components/issues/sub-issues/progressbar.tsx
@@ -0,0 +1,25 @@
+export interface IProgressBar {
+  total: number;
+  done: number;
+}
+
+export const ProgressBar = ({ total = 0, done = 0 }: IProgressBar) => {
+  const calPercentage = (doneValue: number, totalValue: number): string => {
+    if (doneValue === 0 || totalValue === 0) return (0).toFixed(0);
+    return ((100 * doneValue) / totalValue).toFixed(0);
+  };
+
+  return (
+    <div className="relative flex items-center gap-2">
+      <div className="w-full">
+        <div className="w-full rounded-full bg-custom-background-80 overflow-hidden shadow">
+          <div
+            className="bg-green-500 h-[6px] rounded-full"
+            style={{ width: `${calPercentage(done, total)}%` }}
+          />
+        </div>
+      </div>
+      <div className="flex-shrink-0 text-xs font-medium">{calPercentage(done, total)}% Done</div>
+    </div>
+  );
+};
diff --git a/web/components/issues/sub-issues/properties.tsx b/web/components/issues/sub-issues/properties.tsx
new file mode 100644
index 000000000..a899efdcf
--- /dev/null
+++ b/web/components/issues/sub-issues/properties.tsx
@@ -0,0 +1,204 @@
+import React from "react";
+// swr
+import { mutate } from "swr";
+// components
+import { ViewDueDateSelect, ViewStartDateSelect } from "components/issues";
+import { MembersSelect, PrioritySelect } from "components/project";
+import { StateSelect } from "components/states";
+// hooks
+import useIssuesProperties from "hooks/use-issue-properties";
+// types
+import { ICurrentUserResponse, IIssue, IState } from "types";
+// fetch-keys
+import { SUB_ISSUES } from "constants/fetch-keys";
+// services
+import issuesService from "services/issues.service";
+import trackEventServices from "services/track-event.service";
+
+export interface IIssueProperty {
+  workspaceSlug: string;
+  projectId: string;
+  parentIssue: IIssue;
+  issue: IIssue;
+  user: ICurrentUserResponse | undefined;
+  editable: boolean;
+}
+
+export const IssueProperty: React.FC<IIssueProperty> = ({
+  workspaceSlug,
+  projectId,
+  parentIssue,
+  issue,
+  user,
+  editable,
+}) => {
+  const [properties] = useIssuesProperties(workspaceSlug, projectId);
+
+  const handlePriorityChange = (data: any) => {
+    partialUpdateIssue({ priority: data });
+    trackEventServices.trackIssuePartialPropertyUpdateEvent(
+      {
+        workspaceSlug,
+        workspaceId: issue.workspace,
+        projectId: issue.project_detail.id,
+        projectIdentifier: issue.project_detail.identifier,
+        projectName: issue.project_detail.name,
+        issueId: issue.id,
+      },
+      "ISSUE_PROPERTY_UPDATE_PRIORITY",
+      user
+    );
+  };
+
+  const handleStateChange = (data: string, states: IState[] | undefined) => {
+    const oldState = states?.find((s) => s.id === issue.state);
+    const newState = states?.find((s) => s.id === data);
+
+    partialUpdateIssue({
+      state: data,
+      state_detail: newState,
+    });
+    trackEventServices.trackIssuePartialPropertyUpdateEvent(
+      {
+        workspaceSlug,
+        workspaceId: issue.workspace,
+        projectId: issue.project_detail.id,
+        projectIdentifier: issue.project_detail.identifier,
+        projectName: issue.project_detail.name,
+        issueId: issue.id,
+      },
+      "ISSUE_PROPERTY_UPDATE_STATE",
+      user
+    );
+    if (oldState?.group !== "completed" && newState?.group !== "completed") {
+      trackEventServices.trackIssueMarkedAsDoneEvent(
+        {
+          workspaceSlug: issue.workspace_detail.slug,
+          workspaceId: issue.workspace_detail.id,
+          projectId: issue.project_detail.id,
+          projectIdentifier: issue.project_detail.identifier,
+          projectName: issue.project_detail.name,
+          issueId: issue.id,
+        },
+        user
+      );
+    }
+  };
+
+  const handleAssigneeChange = (data: any) => {
+    const newData = issue.assignees ?? [];
+
+    if (newData.includes(data)) newData.splice(newData.indexOf(data), 1);
+    else newData.push(data);
+
+    partialUpdateIssue({ assignees_list: data });
+
+    trackEventServices.trackIssuePartialPropertyUpdateEvent(
+      {
+        workspaceSlug,
+        workspaceId: issue.workspace,
+        projectId: issue.project_detail.id,
+        projectIdentifier: issue.project_detail.identifier,
+        projectName: issue.project_detail.name,
+        issueId: issue.id,
+      },
+      "ISSUE_PROPERTY_UPDATE_ASSIGNEE",
+      user
+    );
+  };
+
+  const partialUpdateIssue = async (data: Partial<IIssue>) => {
+    mutate(
+      workspaceSlug && parentIssue ? SUB_ISSUES(parentIssue.id) : null,
+      (elements: any) => {
+        const _elements = { ...elements };
+        const _issues = _elements.sub_issues.map((element: IIssue) =>
+          element.id === issue.id ? { ...element, ...data } : element
+        );
+        _elements["sub_issues"] = [..._issues];
+        return _elements;
+      },
+      false
+    );
+
+    const issueResponse = await issuesService.patchIssue(
+      workspaceSlug as string,
+      issue.project,
+      issue.id,
+      data,
+      user
+    );
+
+    mutate(
+      SUB_ISSUES(parentIssue.id),
+      (elements: any) => {
+        const _elements = elements.sub_issues.map((element: IIssue) =>
+          element.id === issue.id ? issueResponse : element
+        );
+        elements["sub_issues"] = _elements;
+        return elements;
+      },
+      true
+    );
+  };
+
+  return (
+    <div className="relative flex items-center gap-1">
+      {properties.priority && (
+        <div className="flex-shrink-0">
+          <PrioritySelect
+            value={issue.priority}
+            onChange={handlePriorityChange}
+            hideDropdownArrow
+            disabled={!editable}
+          />
+        </div>
+      )}
+
+      {properties.state && (
+        <div className="flex-shrink-0">
+          <StateSelect
+            value={issue.state_detail}
+            onChange={handleStateChange}
+            hideDropdownArrow
+            disabled={!editable}
+          />
+        </div>
+      )}
+
+      {properties.start_date && issue.start_date && (
+        <div className="flex-shrink-0 w-[104px]">
+          <ViewStartDateSelect
+            issue={issue}
+            partialUpdateIssue={partialUpdateIssue}
+            user={user}
+            isNotAllowed={!editable}
+          />
+        </div>
+      )}
+
+      {properties.due_date && issue.target_date && (
+        <div className="flex-shrink-0 w-[104px]">
+          <ViewDueDateSelect
+            issue={issue}
+            partialUpdateIssue={partialUpdateIssue}
+            user={user}
+            isNotAllowed={!editable}
+          />
+        </div>
+      )}
+
+      {properties.assignee && (
+        <div className="flex-shrink-0">
+          <MembersSelect
+            value={issue.assignees}
+            onChange={handleAssigneeChange}
+            membersDetails={issue.assignee_details}
+            hideDropdownArrow
+            disabled={!editable}
+          />
+        </div>
+      )}
+    </div>
+  );
+};
diff --git a/web/components/issues/sub-issues/root.tsx b/web/components/issues/sub-issues/root.tsx
new file mode 100644
index 000000000..75161e639
--- /dev/null
+++ b/web/components/issues/sub-issues/root.tsx
@@ -0,0 +1,283 @@
+import React from "react";
+// next imports
+import { useRouter } from "next/router";
+// swr
+import useSWR, { mutate } from "swr";
+// lucide icons
+import { Plus, ChevronRight, ChevronDown } from "lucide-react";
+// components
+import { ExistingIssuesListModal } from "components/core";
+import { CreateUpdateIssueModal, DeleteIssueModal } from "components/issues";
+import { SubIssuesRootList } from "./issues-list";
+import { ProgressBar } from "./progressbar";
+// ui
+import { CustomMenu } from "components/ui";
+// hooks
+import { useProjectMyMembership } from "contexts/project-member.context";
+// helpers
+import { copyTextToClipboard } from "helpers/string.helper";
+// types
+import { ICurrentUserResponse, IIssue, ISearchIssueResponse } from "types";
+// services
+import issuesService from "services/issues.service";
+// fetch keys
+import { SUB_ISSUES } from "constants/fetch-keys";
+
+export interface ISubIssuesRoot {
+  parentIssue: IIssue;
+
+  user: ICurrentUserResponse | undefined;
+  editable: boolean;
+}
+
+export const SubIssuesRoot: React.FC<ISubIssuesRoot> = ({ parentIssue, user, editable }) => {
+  const router = useRouter();
+  const { workspaceSlug, projectId } = router.query as { workspaceSlug: string; projectId: string };
+
+  const { memberRole } = useProjectMyMembership();
+
+  const { data: issues } = useSWR(
+    workspaceSlug && projectId && parentIssue && parentIssue?.id
+      ? SUB_ISSUES(parentIssue?.id)
+      : null,
+    workspaceSlug && projectId && parentIssue && parentIssue?.id
+      ? () => issuesService.subIssues(workspaceSlug, projectId, parentIssue.id)
+      : null
+  );
+
+  const [issuesVisibility, setIssuesVisibility] = React.useState<string[]>([parentIssue?.id]);
+  const handleIssuesVisibility = (issueId: string) => {
+    if (issuesVisibility.includes(issueId)) {
+      setIssuesVisibility(issuesVisibility.filter((i: string) => i !== issueId));
+    } else {
+      setIssuesVisibility([...issuesVisibility, issueId]);
+    }
+  };
+
+  const [issueCrudOperation, setIssueCrudOperation] = React.useState<{
+    create: { toggle: boolean; issueId: string | null };
+    existing: { toggle: boolean; issueId: string | null };
+    edit: { toggle: boolean; issueId: string | null; issue: IIssue | null };
+    delete: { toggle: boolean; issueId: string | null; issue: IIssue | null };
+  }>({
+    create: {
+      toggle: false,
+      issueId: null,
+    },
+    existing: {
+      toggle: false,
+      issueId: null,
+    },
+    edit: {
+      toggle: false,
+      issueId: null, // parent issue id for mutation
+      issue: null,
+    },
+    delete: {
+      toggle: false,
+      issueId: null, // parent issue id for mutation
+      issue: null,
+    },
+  });
+  const handleIssueCrudOperation = (
+    key: "create" | "existing" | "edit" | "delete",
+    issueId: string | null,
+    issue: IIssue | null = null
+  ) => {
+    setIssueCrudOperation({
+      ...issueCrudOperation,
+      [key]: {
+        toggle: !issueCrudOperation[key].toggle,
+        issueId: issueId,
+        issue: issue,
+      },
+    });
+  };
+
+  const addAsSubIssueFromExistingIssues = async (data: ISearchIssueResponse[]) => {
+    if (!workspaceSlug || !parentIssue || issueCrudOperation?.existing?.issueId === null) return;
+    const issueId = issueCrudOperation?.existing?.issueId;
+    const payload = {
+      sub_issue_ids: data.map((i) => i.id),
+    };
+
+    await issuesService.addSubIssues(workspaceSlug, projectId, issueId, payload).finally(() => {
+      if (issueId) mutate(SUB_ISSUES(issueId));
+    });
+  };
+
+  const removeIssueFromSubIssues = async (parentIssueId: string, issue: IIssue) => {
+    if (!workspaceSlug || !parentIssue || !issue?.id) return;
+    issuesService
+      .patchIssue(workspaceSlug, projectId, issue.id, { parent: null }, user)
+      .finally(() => {
+        if (parentIssueId) mutate(SUB_ISSUES(parentIssueId));
+      });
+  };
+
+  const copyText = (text: string) => {
+    const originURL =
+      typeof window !== "undefined" && window.location.origin ? window.location.origin : "";
+    copyTextToClipboard(`${originURL}/${text}`).then(() => {
+      // setToastAlert({
+      //   type: "success",
+      //   title: "Link Copied!",
+      //   message: "Issue link copied to clipboard.",
+      // });
+    });
+  };
+
+  const isEditable = memberRole?.isGuest || memberRole?.isViewer ? false : true;
+
+  const mutateSubIssues = (parentIssueId: string | null) => {
+    if (parentIssueId) mutate(SUB_ISSUES(parentIssueId));
+  };
+
+  return (
+    <div className="w-full h-full space-y-2">
+      {parentIssue && parentIssue?.sub_issues_count > 0 ? (
+        <>
+          {/* header */}
+          <div className="relative flex items-center gap-4 text-xs">
+            <div
+              className="rounded border border-custom-border-100 shadow p-1.5 px-2 flex items-center gap-1 hover:bg-custom-background-80 transition-all cursor-pointer select-none"
+              onClick={() => handleIssuesVisibility(parentIssue?.id)}
+            >
+              <div className="flex-shrink-0 w-[16px] h-[16px] flex justify-center items-center">
+                {issuesVisibility.includes(parentIssue?.id) ? (
+                  <ChevronDown width={16} strokeWidth={2} />
+                ) : (
+                  <ChevronRight width={14} strokeWidth={2} />
+                )}
+              </div>
+              <div>Sub-issues</div>
+              <div>({parentIssue?.sub_issues_count})</div>
+            </div>
+
+            <div className="w-full max-w-[250px] select-none">
+              <ProgressBar
+                total={parentIssue?.sub_issues_count}
+                done={
+                  (issues?.state_distribution?.cancelled || 0) +
+                  (issues?.state_distribution?.completed || 0)
+                }
+              />
+            </div>
+
+            {isEditable && issuesVisibility.includes(parentIssue?.id) && (
+              <div className="ml-auto flex-shrink-0 flex items-center gap-2 select-none">
+                <div
+                  className="hover:bg-custom-background-80 transition-all cursor-pointer p-1.5 px-2 rounded border border-custom-border-100 shadow"
+                  onClick={() => handleIssueCrudOperation("create", parentIssue?.id)}
+                >
+                  Add sub-issue
+                </div>
+                <div
+                  className="hover:bg-custom-background-80 transition-all cursor-pointer p-1.5 px-2 rounded border border-custom-border-100 shadow"
+                  onClick={() => handleIssueCrudOperation("existing", parentIssue?.id)}
+                >
+                  Add an existing issue
+                </div>
+              </div>
+            )}
+          </div>
+
+          {/* issues */}
+          {issuesVisibility.includes(parentIssue?.id) && (
+            <div className="border border-b-0 border-custom-border-100">
+              <SubIssuesRootList
+                workspaceSlug={workspaceSlug}
+                projectId={projectId}
+                parentIssue={parentIssue}
+                user={undefined}
+                editable={isEditable}
+                removeIssueFromSubIssues={removeIssueFromSubIssues}
+                issuesVisibility={issuesVisibility}
+                handleIssuesVisibility={handleIssuesVisibility}
+                copyText={copyText}
+                handleIssueCrudOperation={handleIssueCrudOperation}
+              />
+            </div>
+          )}
+        </>
+      ) : (
+        isEditable && (
+          <div className="text-xs py-2 text-custom-text-300 font-medium">
+            <div className="py-3 text-center">No sub issues are available</div>
+            <>
+              <CustomMenu
+                label={
+                  <>
+                    <Plus className="h-3 w-3" />
+                    Add sub-issue
+                  </>
+                }
+                buttonClassName="whitespace-nowrap"
+                position="left"
+                noBorder
+                noChevron
+              >
+                <CustomMenu.MenuItem
+                  onClick={() => handleIssueCrudOperation("create", parentIssue?.id)}
+                >
+                  Create new
+                </CustomMenu.MenuItem>
+                <CustomMenu.MenuItem
+                  onClick={() => handleIssueCrudOperation("existing", parentIssue?.id)}
+                >
+                  Add an existing issue
+                </CustomMenu.MenuItem>
+              </CustomMenu>
+            </>
+          </div>
+        )
+      )}
+
+      {isEditable && issueCrudOperation?.create?.toggle && (
+        <CreateUpdateIssueModal
+          isOpen={issueCrudOperation?.create?.toggle}
+          prePopulateData={{
+            parent: issueCrudOperation?.create?.issueId,
+          }}
+          handleClose={() => handleIssueCrudOperation("create", null)}
+        />
+      )}
+
+      {isEditable &&
+        issueCrudOperation?.existing?.toggle &&
+        issueCrudOperation?.existing?.issueId && (
+          <ExistingIssuesListModal
+            isOpen={issueCrudOperation?.existing?.toggle}
+            handleClose={() => handleIssueCrudOperation("existing", null)}
+            searchParams={{ sub_issue: true, issue_id: issueCrudOperation?.existing?.issueId }}
+            handleOnSubmit={addAsSubIssueFromExistingIssues}
+            workspaceLevelToggle
+          />
+        )}
+
+      {isEditable && issueCrudOperation?.edit?.toggle && issueCrudOperation?.edit?.issueId && (
+        <CreateUpdateIssueModal
+          isOpen={issueCrudOperation?.edit?.toggle}
+          handleClose={() => {
+            mutateSubIssues(issueCrudOperation?.edit?.issueId);
+            handleIssueCrudOperation("edit", null, null);
+          }}
+          data={issueCrudOperation?.edit?.issue}
+        />
+      )}
+
+      {isEditable && issueCrudOperation?.delete?.toggle && issueCrudOperation?.delete?.issueId && (
+        <DeleteIssueModal
+          isOpen={issueCrudOperation?.delete?.toggle}
+          handleClose={() => {
+            mutateSubIssues(issueCrudOperation?.delete?.issueId);
+            handleIssueCrudOperation("delete", null, null);
+          }}
+          data={issueCrudOperation?.delete?.issue}
+          user={user}
+          redirection={false}
+        />
+      )}
+    </div>
+  );
+};
diff --git a/web/components/project/members-select.tsx b/web/components/project/members-select.tsx
index f99d85174..4ffad72b9 100644
--- a/web/components/project/members-select.tsx
+++ b/web/components/project/members-select.tsx
@@ -82,7 +82,7 @@ export const MembersSelect: React.FC<Props> = ({
     <Tooltip
       tooltipHeading="Assignee"
       tooltipContent={
-        membersDetails.length > 0
+        membersDetails && membersDetails.length > 0
           ? membersDetails.map((assignee) => assignee?.display_name).join(", ")
           : "No Assignee"
       }