Add pending and pending receiving user interfaces

GitLab: #101
GitLab: #102

Change-Id: I202372a92246c72225bb1fe277147fe5ee2f9981
diff --git a/client/src/pages/CallPending.tsx b/client/src/pages/CallPending.tsx
new file mode 100644
index 0000000..27d28e5
--- /dev/null
+++ b/client/src/pages/CallPending.tsx
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+import { Box, CircularProgress, Grid, Stack, Typography } from '@mui/material';
+import { Trans } from 'react-i18next';
+
+import {
+  CallingAnswerAudioButton,
+  CallingAnswerVideoButton,
+  CallingEndButton,
+  CallingRefuseButton,
+} from '../components/CallButtons';
+
+export type CallPendingProps = {
+  pending: PendingStatus;
+  caller?: CallerStatus;
+  medium?: CommunicationMedium;
+};
+
+type PendingStatus = 'caller' | 'receiver';
+type CallerStatus = 'calling' | 'connecting';
+type CommunicationMedium = 'audio' | 'video';
+
+const RECEIVER_BUTTONS = [
+  {
+    ButtonComponent: CallingRefuseButton,
+    translationKey: 'refuse_call',
+  },
+  {
+    ButtonComponent: CallingAnswerAudioButton,
+    translationKey: 'accept_call_audio',
+  },
+  {
+    ButtonComponent: CallingAnswerVideoButton,
+    translationKey: 'accept_call_video',
+  },
+];
+
+export const CallPending = (props: CallPendingProps) => {
+  return (
+    <Stack
+      direction="column"
+      justifyContent="center"
+      alignItems="center"
+      height="100%"
+      spacing={4}
+      sx={{
+        backgroundColor: 'black',
+      }}
+    >
+      <Box
+        sx={{
+          position: 'relative',
+          display: 'flex',
+          alignItems: 'center',
+          justifyContent: 'center',
+          width: '100%',
+          height: '30%',
+        }}
+      >
+        <Box
+          sx={{
+            aspectRatio: '1',
+            height: '100%',
+            position: 'absolute',
+          }}
+        >
+          <CircularProgress
+            disableShrink
+            thickness={1}
+            size="100%"
+            sx={{
+              position: 'absolute',
+              color: 'white',
+              zIndex: 1,
+            }}
+          />
+          <img
+            // TODO: Insert incoming caller icon here
+            style={{
+              position: 'absolute',
+              objectFit: 'cover',
+              width: '100%',
+              height: '100%',
+              maxWidth: '100%',
+              borderRadius: '50%',
+              aspectRatio: '1',
+            }}
+          />
+        </Box>
+      </Box>
+      {props.pending === 'caller' ? (
+        <CallPendingCallerInterface {...props} />
+      ) : (
+        <CallPendingReceiverInterface {...props} />
+      )}
+    </Stack>
+  );
+};
+
+export const CallPendingCallerInterface = ({ caller }: CallPendingProps) => {
+  // TODO: Remove the dummy name
+  const defaultName = 'Alex Thérieur';
+  return (
+    <Stack textAlign="center" spacing={2}>
+      <Typography variant="h1" color="white">
+        {defaultName}
+      </Typography>
+      <Typography variant="h3" color="white">
+        {caller === 'calling' ? <Trans i18nKey="calling" /> : <Trans i18nKey="connecting" />}
+      </Typography>
+      <CallerButtons />
+    </Stack>
+  );
+};
+
+export const CallPendingReceiverInterface = ({ medium }: CallPendingProps) => {
+  // TODO: Remove the dummy name
+  const defaultName = 'Alain Thérieur';
+  return (
+    <Stack textAlign="center" spacing={2}>
+      <Typography variant="h1" color="white">
+        <Trans i18nKey="incoming_call" context={medium} values={{ member0: defaultName }} />
+      </Typography>
+      <ReceiverButtons />
+    </Stack>
+  );
+};
+
+const CallerButtons = () => {
+  return (
+    <Stack textAlign="center" spacing={1}>
+      <CallingEndButton size="large" />
+      <Typography variant="body2" color="white">
+        <Trans i18nKey="end_call" />
+      </Typography>
+    </Stack>
+  );
+};
+
+const ReceiverButtons = () => {
+  return (
+    <Grid container direction="row" padding={2}>
+      {RECEIVER_BUTTONS.map(({ ButtonComponent, translationKey }, i) => (
+        <Grid item xs={4} key={i}>
+          <Stack spacing={1}>
+            <ButtonComponent color="inherit" size="large" />
+            <Typography variant="body2" color="white" textAlign="center" sx={{ opacity: 0.75 }}>
+              <Trans i18nKey={'' + translationKey} />
+            </Typography>
+          </Stack>
+        </Grid>
+      ))}
+    </Grid>
+  );
+};