All files / src/query QueryParser.js

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"use strict";
 
/**
 * Helper functionality for parsing query representes
 * in different formats into the one this package supports.
 */
class QueryParser
{
  constructor(config)
  {
    for (let property in config)
    {
      /** @private */
      this[property] = config[property];
    }
 
    this.fields = this.fields || {};
    this.sort = this.sort || [];
 
    // figure out a default field
    if (!this.fields[this.defaultField])
    {
      for (let [field, body] of Object.entries(this.fields))
      {
        if (body.default)
        {
          this.defaultField = field;
          break;
        }
      }
    }
    this.defaultField = this.defaultField || Object.keys(this.fields)[0];
    if (!this.fields[this.defaultField])
    {
      throw new Error('Could not determine default field');
    }
    const filters = this.fields[this.defaultField].filters;
    this.defaultFilter = filters[0];
    this.defaultExactFilter = this.defaultFilter + 'exact';
    if (filters.indexOf(this.defaultExactFilter) === -1)
    {
      this.defaultExactFilter = this.defaultFilter;
    }
    this.defaultSort = this.defaultSort || false;
    this.defaultSortOrder = this.defaultSortOrder || 'asc';
  }
 
  getDefault()
  {
    return {
      filter: [],
      sort: this.defaultSort,
      order: this.defaultSortOrder,
    };
  }
 
}
 
module.exports = QueryParser;