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The usePreferences hook provides a way to fetch and manage notification preferences for the current subscriber. This includes both global preferences and workflow-specific preferences.

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Return Value

type PreferencesReturn = {
  preferences: Array<{
    template: {
      _id: string;
      name: string;
      critical: boolean;
    };
    channels: {
      email?: boolean;
      sms?: boolean;
      in_app?: boolean;
      chat?: boolean;
      push?: boolean;
    };
  }>;
  isLoading: boolean;
  error: Error | null;
  updatePreference: (params: {
    templateId: string;
    channelType: string;
    enabled: boolean;
  }) => Promise<void>;
};

​
Example Usage

Here’s how to use the usePreferences hook to display and manage notification preferences: 
import { usePreferences } from '@novu/react-native';
import { View, Text, Switch, ActivityIndicator } from 'react-native';

function PreferencesList() {
  const { preferences, isLoading, error, updatePreference } = usePreferences();

  if (isLoading) return <ActivityIndicator />;
  if (error) return <Text>Error: {error.message}</Text>;

  return (
    <View>
      {preferences.map((preference) => (
        <View key={preference.template._id}>
          <Text style={styles.heading}>{preference.template.name}</Text>

          <View style={styles.row}>
            <Text>Email Notifications</Text>
            <Switch
              value={preference.channels.email}
              onValueChange={(enabled) => {
                updatePreference({
                  templateId: preference.template._id,
                  channelType: 'email',
                  enabled,
                });
              }}
            />
          </View>

          <View style={styles.row}>
            <Text>SMS Notifications</Text>
            <Switch
              value={preference.channels.sms}
              onValueChange={(enabled) => {
                updatePreference({
                  templateId: preference.template._id,
                  channelType: 'sms',
                  enabled,
                });
              }}
            />
          </View>
        </View>
      ))}
    </View>
  );
}

const styles = {
  heading: {
    fontSize: 18,
    fontWeight: 'bold',
    marginBottom: 10,
  },
  row: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'center',
    paddingVertical: 8,
  },
};

​
With Channel Groups

You can organize preferences by channel type: 
import { View, Text, Switch } from 'react-native';
function ChannelPreferences() {
  const { preferences, updatePreference } = usePreferences();

  const emailPreferences = preferences.filter((pref) => pref.channels.email !== undefined);

  return (
    <View>
      <Text style={styles.heading}>Email Preferences</Text>
      {emailPreferences.map((preference) => (
        <View key={preference.template._id} style={styles.row}>
          <Text>{preference.template.name}</Text>
          <Switch
            value={preference.channels.email}
            onValueChange={(enabled) => {
              updatePreference({
                templateId: preference.template._id,
                channelType: 'email',
                enabled,
              });
            }}
          />
        </View>
      ))}
    </View>
  );
}

​
With Critical Workflows

Some workflows might be marked as critical, meaning they cannot be disabled: 
import { View, Text, Switch } from 'react-native';

function CriticalPreferences() {
  const { preferences, updatePreference } = usePreferences();

  return (
    <View>
      {preferences.map((preference) => (
        <View key={preference.template._id}>
          <Text style={styles.heading}>{preference.template.name}</Text>
          {preference.template.critical ? (
            <Text style={styles.critical}>Critical - Cannot be disabled</Text>
          ) : (
            <View style={styles.row}>
              <Text>Enable Notifications</Text>
              <Switch
                value={preference.channels.email}
                onValueChange={(enabled) => {
                  updatePreference({
                    templateId: preference.template._id,
                    channelType: 'email',
                    enabled,
                  });
                }}
              />
            </View>
          )}
        </View>
      ))}
    </View>
  );
}

const styles = {
  critical: {
    color: 'red',
    fontStyle: 'italic',
  },
};
Changes to preferences are automatically synchronized with the server and will affect future notifications immediately.