react-native-flipper-databases/lib/module/drivers/realm.js

Flipper Databases plugin for React Native

export class RealmDriver {
  constructor(name, realm) {
    this.name = name;
    this.realm = realm;
  }

  async getDatabases() {
    return [{
      name: this.name
    }];
  }

  async getTableNames(_databaseDescriptor) {
    // Return all models excluding embedded ones
    return this.realm.schema.filter(schema => !schema.embedded).map(schema => schema.name);
  }

  async getTableStructure(_databaseDescriptor, schema) {
    const schemaProps = getSchemaProperties(this.realm, schema);
    const schemaColumns = Object.keys(schemaProps);
    const columnsDef = schemaColumns.map(k => [k, schemaProps[k].type, schemaProps[k].default, schemaProps[k].indexed, schemaProps[k].optional, schemaProps[k].mapTo]);
    return {
      structureColumns: ['name', 'type', 'defaultValue', 'isIndexed', 'isOptional', 'mapTo'],
      structureValues: columnsDef,
      indexesColumns: ['name', 'type'],
      indexesValues: schemaColumns.filter(k => schemaProps[k].indexed).map(k => [k, schemaProps[k].type])
    };
  }

  async getTableData(_databaseDescriptor, schema, order, reverse, start, count) {
    const schemaProperties = getSchemaProperties(this.realm, schema);
    const allColumns = Object.keys(schemaProperties);
    const dataSnapshot = this.realm.objects(schema).snapshot();
    const sorted = order ? dataSnapshot.sorted(order, reverse) : dataSnapshot;
    const data = sorted.slice(start, start + count);
    return {
      columns: allColumns,
      values: data.map(row => {
        const rowJSON = row.toJSON();
        return allColumns.map(colName => getCellValue(rowJSON, colName));
      }),
      start,
      count: data.length,
      total: dataSnapshot.length
    };
  }

  async getTableInfo(_databaseDescriptor, table) {
    const tableSchema = this.realm.schema.find(schema => schema.name === table);
    return {
      definition: JSON.stringify(tableSchema, null, 2)
    };
  }

  async executeSql(_databaseDescriptor, _query) {
    return Promise.reject('Unsupported method');
  }

} // UTILITY FUNCTIONS

function getSchemaProperties(realm, schemaName) {
  var _realm$schema$find;

  return ((_realm$schema$find = realm.schema.find(schema => schema.name === schemaName)) === null || _realm$schema$find === void 0 ? void 0 : _realm$schema$find.properties) ?? {};
}

export function getCellValue(row, columnName) {
  const cellValue = row[columnName];
  return typeof cellValue === 'object' ? JSON.stringify(cellValue, null, 2) : cellValue;
}
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