From cbf8a5e25bdde0ba2015f5c910189835e87e601d Mon Sep 17 00:00:00 2001
From: Martin Krulis <krulis@d3s.mff.cuni.cz>
Date: Sat, 19 Aug 2023 16:10:35 +0200
Subject: [PATCH] Fixing bugs.

---
 src/pages/Exercise/Exercise.js                | 42 ++++++++++++-------
 .../ExerciseReferenceSolutions.js             | 13 +++---
 2 files changed, 36 insertions(+), 19 deletions(-)

diff --git a/src/pages/Exercise/Exercise.js b/src/pages/Exercise/Exercise.js
index 09bd0a4e9..d72ae0175 100644
--- a/src/pages/Exercise/Exercise.js
+++ b/src/pages/Exercise/Exercise.js
@@ -5,6 +5,7 @@ import { connect } from 'react-redux';
 import { FormattedMessage, injectIntl } from 'react-intl';
 import { Row, Col } from 'react-bootstrap';
 import { Link } from 'react-router-dom';
+import { defaultMemoize } from 'reselect';
 
 import SubmitSolutionContainer from '../../containers/SubmitSolutionContainer';
 import CommentThreadContainer from '../../containers/CommentThreadContainer';
@@ -44,6 +45,10 @@ export const FORK_EXERCISE_FORM_INITIAL_VALUES = {
   groupId: '',
 };
 
+const getPromotedReferenceSolutions = defaultMemoize(referenceSolutions =>
+  referenceSolutions.filter(rs => rs.visibility > 1)
+);
+
 class Exercise extends Component {
   state = { forkId: Math.random().toString() };
 
@@ -184,31 +189,40 @@ class Exercise extends Component {
                                 )}
                               </Button>
                             )}
-                            <Link to={EXERCISE_REFERENCE_SOLUTIONS_URI_FACTORY(exercise.id)}>
-                              <Button variant="primary">
-                                <FormattedMessage
-                                  id="app.exercise.allRefSolutions"
-                                  defaultMessage="All Reference Solutions"
-                                />
-                              </Button>
-                            </Link>
+                            {referenceSolutions && referenceSolutions.size > 0 && (
+                              <Link to={EXERCISE_REFERENCE_SOLUTIONS_URI_FACTORY(exercise.id)}>
+                                <Button variant="primary">
+                                  <FormattedMessage
+                                    id="app.exercise.allRefSolutions"
+                                    defaultMessage="All Reference Solutions"
+                                  />
+                                </Button>
+                              </Link>
+                            )}
                           </TheButtonGroup>
                         </div>
                       }>
                       <div>
                         <ResourceRenderer resource={referenceSolutions.toArray()} returnAsArray>
                           {referenceSolutions =>
-                            referenceSolutions.length > 0 ? (
+                            getPromotedReferenceSolutions(referenceSolutions).length > 0 ? (
                               <ReferenceSolutionsTable
-                                referenceSolutions={referenceSolutions}
+                                referenceSolutions={getPromotedReferenceSolutions(referenceSolutions)}
                                 runtimeEnvironments={runtimes}
                               />
                             ) : (
                               <div className="text-center m-3 text-muted small">
-                                <FormattedMessage
-                                  id="app.exercise.noPromotedReferenceSolutions"
-                                  defaultMessage="There are no promoted reference solutions for this exercise yet."
-                                />
+                                {referenceSolutions.length === 0 ? (
+                                  <FormattedMessage
+                                    id="app.exercise.noReferenceSolutions"
+                                    defaultMessage="There are no reference solutions for this exercise yet."
+                                  />
+                                ) : (
+                                  <FormattedMessage
+                                    id="app.exercise.noPromotedReferenceSolutions"
+                                    defaultMessage="There are no promoted reference solutions for this exercise yet."
+                                  />
+                                )}
                               </div>
                             )
                           }
diff --git a/src/pages/ExerciseReferenceSolutions/ExerciseReferenceSolutions.js b/src/pages/ExerciseReferenceSolutions/ExerciseReferenceSolutions.js
index 817749d12..896b92aad 100644
--- a/src/pages/ExerciseReferenceSolutions/ExerciseReferenceSolutions.js
+++ b/src/pages/ExerciseReferenceSolutions/ExerciseReferenceSolutions.js
@@ -49,7 +49,7 @@ import { referenceSolutionsSelector } from '../../redux/selectors/referenceSolut
 import { loggedInUserIdSelector } from '../../redux/selectors/auth';
 import { getReadyUserSelector } from '../../redux/selectors/users';
 
-import { storageGetItem, storageSetItem } from '../../helpers/localStorage';
+import { storageGetItem, storageSetItem, storageRemoveItem } from '../../helpers/localStorage';
 import { hasPermissions, safeGet, objectFilter } from '../../helpers/common';
 import withLinks from '../../helpers/withLinks';
 import withRouter, { withRouterProps } from '../../helpers/withRouter';
@@ -265,16 +265,19 @@ class ExerciseReferenceSolutions extends Component {
     ...INITIAL_FILTER_STATE,
   };
 
+  openFilters = () => this.setState({ filtersOpen: true });
+  closeFilters = () => this.setState({ filtersOpen: false });
+  resetFilters = () => {
+    storageRemoveItem(LOCAL_STORAGE_STATE_KEY);
+    this.setState(INITIAL_FILTER_STATE);
+  };
+
   _setFilterState = newState => {
     const toSave = objectFilter({ ...this.state, ...newState }, (_, key) => INITIAL_FILTER_STATE[key]);
     storageSetItem(LOCAL_STORAGE_STATE_KEY, toSave);
     this.setState(newState);
   };
 
-  openFilters = () => this.setState({ filtersOpen: true });
-  closeFilters = () => this.setState({ filtersOpen: false });
-  resetFilters = () => this.setState(INITIAL_FILTER_STATE);
-
   toggleShowMine = () => this._setFilterState({ showMine: !this.state.showMine || !this.state.showOthers });
   toggleShowOthers = () => this._setFilterState({ showOthers: !this.state.showMine || !this.state.showOthers });