[front] feat: display entity contexts on comparison page

frontend/public/locales/en/translation.json

@@ -91,6 +91,12 @@
     "inactivePollComparisonCannotBeSubmittedOrEdited": "No comparison can be submitted or modified.",
     "comparisonCriteria": "Comparison criteria"
   },
+  "entityContext": {
+    "entityAtheAssociationWouldLikeToGiveYouContext": "<0>{{entityName}} A</0> - The Tournesol association would like to give you some context.",
+    "entityBtheAssociationWouldLikeToGiveYouContext": "<0>{{entityName}} B</0> - The Tournesol association would like to give you some context.",
+    "theAssociationWouldLikeToGiveYouContext": "The Tournesol association would like to give you some context on this element.",
+    "about": "About"
+  },
   "comparisonHelper": {
     "hideHelp": "Hide the help",
     "showHelp": "Show help for comparisons"
@@ -109,9 +115,6 @@
   "entityContextTextList": {
     "whyThisMessage": "Why this message?"
   },
-  "contextsFromOrigin": {
-    "theAssociationWouldLikeToGiveYouContext": "The Tournesol association would like to give you some context on this element."
-  },
   "entitySelector": {
     "newVideo": "Select a new video automatically",
     "letTournesolSelectAVideo": "Let Tournesol select a video",

frontend/public/locales/fr/translation.json

@@ -95,6 +95,12 @@
     "inactivePollComparisonCannotBeSubmittedOrEdited": "Aucune comparaison ne peut être ajoutée ou modifiée.",
     "comparisonCriteria": "Critères de comparaison"
   },
+  "entityContext": {
+    "entityAtheAssociationWouldLikeToGiveYouContext": "<0>{{entityName}} A</0> - L'association Tournesol souhaite vous apporter du contexte.",
+    "entityBtheAssociationWouldLikeToGiveYouContext": "<0>{{entityName}} B</0> - L'association Tournesol souhaite vous apporter du contexte.",
+    "theAssociationWouldLikeToGiveYouContext": "L'association Tournesol souhaite vous apporter du contexte sur cet élément.",
+    "about": "A propos de"
+  },
   "comparisonHelper": {
     "hideHelp": "Cacher l'aide",
     "showHelp": "Montrer l'aide pour les comparaisons"
@@ -113,9 +119,6 @@
   "entityContextTextList": {
     "whyThisMessage": "Pourquoi ce message ?"
   },
-  "contextsFromOrigin": {
-    "theAssociationWouldLikeToGiveYouContext": "L'association Tournesol souhaite vous apporter du contexte sur cet élément."
-  },
   "entitySelector": {
     "newVideo": "Sélectionner une nouvelle vidéo automatiquement",
     "letTournesolSelectAVideo": "Laisser Tournesol choisir une vidéo",

frontend/src/features/comparisons/Comparison.tsx

@@ -1,4 +1,10 @@
-import React, { useState, useEffect, useCallback, useMemo } from 'react';
+import React, {
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from 'react';
 import { useHistory, useLocation } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { Location } from 'history';
@@ -17,6 +23,7 @@
 } from 'src/features/entity_selector/EntitySelector';
 import { UID_YT_NAMESPACE } from 'src/utils/constants';
 import { useCurrentPoll } from 'src/hooks/useCurrentPoll';
+import ComparisonEntityContexts from './ComparisonEntityContexts';
 import ComparisonHelper from './ComparisonHelper';
 
 export const UID_PARAMS: { vidA: string; vidB: string } = {
@@ -72,11 +79,14 @@
   autoFillSelectorA = false,
   autoFillSelectorB = false,
 }: Props) => {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const currentLang = i18n.resolvedLanguage;
+
   const history = useHistory();
   const location = useLocation();
   const { showSuccessAlert, displayErrorsFrom } = useNotifications();
   const { name: pollName } = useCurrentPoll();
+
   const [isLoading, setIsLoading] = useState(true);
 
   const [initialComparison, setInitialComparison] =
@@ -144,6 +154,25 @@
         });
   }, [pollName, uidA, uidB, selectorA.uid, selectorB.uid]);
 
+  /**
+   * When the UI language changes, refresh the ratings to retrieve the
+   * corresponding localized entity contexts.
+   */
+  useEffect(() => {
+    if (isLoading) {
+      return;
+    }
+
+    if (selectorA.uid) {
+      setSelectorA((value) => ({ ...value, ratingIsExpired: true }));
+    }
+
+    if (selectorB.uid) {
+      setSelectorB((value) => ({ ...value, ratingIsExpired: true }));
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [currentLang]);
+
   const onSubmitComparison = async (c: ComparisonRequest) => {
     try {
       if (initialComparison) {
@@ -250,6 +279,9 @@
       >
         <ComparisonHelper />
       </Grid>
+      <Grid item xs={12}>
+        <ComparisonEntityContexts selectorA={selectorA} selectorB={selectorB} />
+      </Grid>
       <Grid
         item
         xs={12}

frontend/src/features/comparisons/ComparisonEntityContexts.tsx

@@ -0,0 +1,105 @@
+import React from 'react';
+import { Trans, useTranslation } from 'react-i18next';
+
+import { Grid, useTheme } from '@mui/material';
+
+import EntityContextBox from 'src/features/entity_context/EntityContextBox';
+import { SelectorValue } from 'src/features/entity_selector/EntitySelector';
+import { useCurrentPoll } from 'src/hooks';
+import { getEntityName } from 'src/utils/constants';
+
+interface EntityContextBoxProps {
+  selectorA: SelectorValue;
+  selectorB: SelectorValue;
+}
+
+const ComparisonEntityContextsItem = ({
+  selector,
+  altAssociationDisclaimer,
+}: {
+  selector: SelectorValue;
+  altAssociationDisclaimer?: React.ReactElement;
+}) => {
+  return (
+    <>
+      {selector.rating && selector.uid && selector.rating.entity_contexts && (
+        <EntityContextBox
+          uid={selector.uid}
+          contexts={selector.rating.entity_contexts}
+          entityName={selector.rating?.entity?.metadata?.name}
+          altAssociationDisclaimer={altAssociationDisclaimer}
+          collapsible={true}
+        />
+      )}
+    </>
+  );
+};
+
+const ComparisonEntityContexts = ({
+  selectorA,
+  selectorB,
+}: EntityContextBoxProps) => {
+  const theme = useTheme();
+
+  const { t } = useTranslation();
+  const { name: pollName } = useCurrentPoll();
+
+  const entityName = getEntityName(t, pollName);
+
+  return (
+    <Grid
+      container
+      spacing={1}
+      sx={{
+        'span.primary': {
+          color: theme.palette.secondary.main,
+          fontWeight: 'bold',
+          textTransform: 'capitalize',
+        },
+      }}
+    >
+      {selectorA.uid === selectorB.uid ? (
+        <Grid item xs={12}>
+          <ComparisonEntityContextsItem selector={selectorA} />
+        </Grid>
+      ) : (
+        <>
+          <Grid item xs={12} sm={12} md={6}>
+            <ComparisonEntityContextsItem
+              selector={selectorA}
+              altAssociationDisclaimer={
+                <strong>
+                  <Trans
+                    t={t}
+                    i18nKey="entityContext.entityAtheAssociationWouldLikeToGiveYouContext"
+                  >
+                    <span className="primary">{{ entityName }} A</span> - The
+                    Tournesol association would like to give you some context.
+                  </Trans>
+                </strong>
+              }
+            />
+          </Grid>
+          <Grid item xs={12} sm={12} md={6}>
+            <ComparisonEntityContextsItem
+              selector={selectorB}
+              altAssociationDisclaimer={
+                <strong>
+                  <Trans
+                    t={t}
+                    i18nKey="entityContext.entityBtheAssociationWouldLikeToGiveYouContext"
+                  >
+                    <span className="primary">{{ entityName }} B</span> - The
+                    Tournesol association would like to give you some context.
+                  </Trans>
+                </strong>
+              }
+            />
+          </Grid>
+        </>
+      )}
+    </Grid>
+  );
+};
+
+export default ComparisonEntityContexts;

frontend/src/features/entity_context/EntityContextBox.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState } from 'react';
 import { Link as RouterLink } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import linkifyStr from 'linkify-string';
@@ -7,23 +7,39 @@ import {
   Alert,
   AlertTitle,
   Box,
+  Collapse,
   Divider,
+  IconButton,
   Link,
   SxProps,
   Typography,
 } from '@mui/material';
+import { KeyboardArrowDown, KeyboardArrowUp } from '@mui/icons-material';
 
 import { EntityContext, OriginEnum } from 'src/services/openapi';
+import {
+  getCollapsedState,
+  setCollapsedState,
+} from 'src/utils/entityContexts/collapsed';
 
 interface EntityContextBoxProps {
   uid: string;
   contexts: Array<EntityContext>;
+  // If set, display the entity name before the contexts.
+  entityName?: string;
+  // If true the contexts can be collapsed.
+  collapsible?: boolean;
+  // Replace the default association disclaier.
+  altAssociationDisclaimer?: React.ReactElement;
 }
 
 interface EntityContextListProps {
   uid: string;
   origin_?: OriginEnum;
   contexts: Array<EntityContext>;
+  entityName?: string;
+  collapsible?: boolean;
+  diclaimer?: React.ReactElement;
 }
 
 interface EntityContextTextListProps {
@@ -78,9 +94,21 @@ const EntityContextList = ({
   uid,
   contexts,
   origin_,
+  diclaimer,
+  entityName,
+  collapsible,
 }: EntityContextListProps) => {
   const { t } = useTranslation();
 
+  const [displayText, setDisplayText] = useState(
+    collapsible ? !getCollapsedState(uid) : true
+  );
+
+  const toggleDisplayText = (previousState: boolean) => {
+    setCollapsedState(uid, previousState);
+    setDisplayText(!previousState);
+  };
+
   const infos = contexts.filter((ctx) => !ctx.unsafe);
   const warnings = contexts.filter((ctx) => ctx.unsafe);
 
@@ -96,25 +124,58 @@ const EntityContextList = ({
     <Alert
       id="entity-context"
       severity={entityHasWarnings ? 'warning' : 'info'}
-      sx={alertSx}
+      sx={{
+        '.MuiAlert-message': { width: '100%' },
+        ...alertSx,
+      }}
     >
-      <AlertTitle>
-        <strong>
-          {origin_ === OriginEnum.ASSOCIATION &&
-            t('contextsFromOrigin.theAssociationWouldLikeToGiveYouContext')}
-        </strong>
-      </AlertTitle>
-
-      <EntityContextTextList
-        uid={uid}
-        origin_={origin_}
-        contexts={entityHasWarnings ? warnings : infos}
-      />
+      <Box display="flex" justifyContent="space-between">
+        <AlertTitle>
+          {diclaimer ? (
+            diclaimer
+          ) : (
+            <strong>
+              {origin_ === OriginEnum.ASSOCIATION &&
+                t('entityContext.theAssociationWouldLikeToGiveYouContext')}
+            </strong>
+          )}
+        </AlertTitle>
+
+        {collapsible && (
+          <IconButton
+            aria-label="Show context"
+            onClick={() => {
+              toggleDisplayText(displayText ? true : false);
+            }}
+          >
+            {displayText ? <KeyboardArrowUp /> : <KeyboardArrowDown />}
+          </IconButton>
+        )}
+      </Box>
+
+      <Collapse in={displayText}>
+        {entityName && (
+          <Typography paragraph variant="body2" fontStyle="italic">
+            {t('entityContext.about')} « {entityName} »
+          </Typography>
+        )}
+        <EntityContextTextList
+          uid={uid}
+          origin_={origin_}
+          contexts={entityHasWarnings ? warnings : infos}
+        />
+      </Collapse>
     </Alert>
   );
 };
 
-const EntityContextBox = ({ uid, contexts }: EntityContextBoxProps) => {
+const EntityContextBox = ({
+  uid,
+  contexts,
+  entityName,
+  altAssociationDisclaimer,
+  collapsible = false,
+}: EntityContextBoxProps) => {
   const associationContexts = contexts.filter(
     (ctx) => ctx.origin === OriginEnum.ASSOCIATION
   );
@@ -127,6 +188,9 @@ const EntityContextBox = ({ uid, contexts }: EntityContextBoxProps) => {
             uid={uid}
             origin_={OriginEnum.ASSOCIATION}
             contexts={associationContexts}
+            diclaimer={altAssociationDisclaimer}
+            entityName={entityName}
+            collapsible={collapsible}
           />
         </Box>
       )}

frontend/src/features/entity_selector/EntitySelector.tsx

@@ -307,6 +307,7 @@ const EntitySelectorInnerAuth = ({
           <Typography
             variant="h6"
             color="secondary"
+            fontWeight="bold"
             sx={{ '&:first-letter': { textTransform: 'capitalize' } }}
           >
             {title}