From f99939a6b1e8d64e0427b326053f468d13d54f9e Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Thu, 23 Feb 2023 12:40:43 +0300
Subject: oauth2: data: link data to groups.

---
 wqflask/wqflask/oauth2/data.py                  | 63 +++++++++++++++++++++----
 wqflask/wqflask/templates/oauth2/data-list.html |  3 +-
 2 files changed, 57 insertions(+), 9 deletions(-)

diff --git a/wqflask/wqflask/oauth2/data.py b/wqflask/wqflask/oauth2/data.py
index 44b65575..b080d4df 100644
--- a/wqflask/wqflask/oauth2/data.py
+++ b/wqflask/wqflask/oauth2/data.py
@@ -1,15 +1,15 @@
 """Handle linking data to groups."""
-
-from flask import Response, Blueprint, render_template
+from flask import (
+    flash, request, url_for, redirect, Response, Blueprint, render_template)
 
 from .request_utils import process_error
 from .client import oauth2_get, oauth2_post
 
 data = Blueprint("data", __name__)
 
-@data.route("/list")
+@data.route("/list", methods=["GET", "POST"])
 def list_data():
-    
+    """List ungrouped data."""
     def __render__(**kwargs):
         roles = kwargs.get("roles", [])
         user_privileges = tuple(
@@ -19,16 +19,63 @@ def list_data():
             "oauth2/data-list.html",
             groups=kwargs.get("groups", []),
             data_items=kwargs.get("data_items", []),
-            user_privileges=kwargs.get("user_privileges",[]),
+            user_privileges=user_privileges,
             **{key:val for key,val in kwargs.items()
                if key not in ("groups", "data_items", "user_privileges")})
 
     groups = oauth2_get("oauth2/group/list").either(
         lambda err: {"groups_error": process_error(err)},
         lambda grp: {"groups": grp})
-    roles = oauth2_get("oauth2/roles").either(
+    roles = oauth2_get("oauth2/user/roles").either(
         lambda err: {"roles_error": process_error(err)},
         lambda roles: {"roles": roles})
-    data_items = {}
 
-    return __render__(**{**groups, **roles, **data_items})
+    if request.method == "GET":
+        return __render__(**{**groups, **roles})
+
+    dataset_type = request.form["dataset_type"]
+    offset = int(request.form.get("offset", 0))
+    if dataset_type not in ("mrna", "genotype", "phenotype"):
+        flash("InvalidDatasetType: An invalid dataset type was provided",
+              "alert-danger")
+        return __render__(**{**groups, **roles})
+
+    data_items = oauth2_get(
+        f"oauth2/resource/{dataset_type}/ungrouped-data?offset={offset}").either(
+            lambda err: {"data_items_error": process_error(err)},
+            lambda data: {"data_items": data})
+    return __render__(**{
+        **groups, **roles, **data_items, "dataset_type": dataset_type,
+            "offset": (offset if offset >= 100 else 0)
+    })
+
+@data.route("/link", methods=["POST"])
+def link_data():
+    """Link the selected data to a specific group."""
+    def __error__(err, form_data):
+        error = process_error(err)
+        flash(f"{error['error']}: {error['error_description']}", "alert-danger")
+        return redirect(url_for("oauth2.data.list_data", **form_data), code=307)
+    def __success__(success, form_data):
+        flash("Data successfully linked!", "alert-success")
+        return redirect(url_for("oauth2.data.list_data", **form_data), code=307)
+
+    form = request.form
+    try:
+        keys = ("dataset_id", "dataset_type", "group_id")
+        assert all(item in form for item in keys)
+        assert all(bool(form[item]) for item in keys)
+        state_data = {
+            "dataset_type": form["dataset_type"],
+            "offset": form.get("offset", 0)}
+        return oauth2_post(
+            "oauth2/resource/data/link",
+            data={
+                "dataset_type": form["dataset_type"],
+                "dataset_id": form["dataset_id"],
+                "group_id": form["group_id"]
+            }).either(lambda err: __error__(err, state_data),
+                      lambda success: __success__(success, state_data))
+    except AssertionError as aserr:
+        flash("You must provide all the expected data.", "alert-error")
+        return redirect(url_for("oauth2.data.list_data"))
diff --git a/wqflask/wqflask/templates/oauth2/data-list.html b/wqflask/wqflask/templates/oauth2/data-list.html
index 6c05845c..d153d413 100644
--- a/wqflask/wqflask/templates/oauth2/data-list.html
+++ b/wqflask/wqflask/templates/oauth2/data-list.html
@@ -55,7 +55,8 @@
 	      <tbody>
 		{%for data_item in data_items%}
 		  <tr>
-		    <form method="POST" action="#/link-data">
+		    <form method="POST" action="{{url_for('oauth2.data.link_data')}}">
+		      <input type="hidden" name="offset" value="{{offset or 0}}" />
 		      <input type="hidden" name="dataset_id" value="{{data_item.Id}}" />
 		      <input type="hidden" name="dataset_type" value="{{dataset_type}}" />
 		      <td>
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