@gethue/sql-formatter/lib/core/Indentation.js

Format whitespace in a SQL query to make it more readable

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _utils = require("../utils");

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var INDENT_TYPE_TOP_LEVEL = 'top-level';
var INDENT_TYPE_BLOCK_LEVEL = 'block-level';
/**
 * Manages indentation levels.
 *
 * There are two types of indentation levels:
 *
 * - BLOCK_LEVEL : increased by open-parenthesis
 * - TOP_LEVEL : increased by RESERVED_TOP_LEVEL words
 */

var Indentation = /*#__PURE__*/function () {
  /**
   * @param {String} indent Indent value, default is "  " (2 spaces)
   */
  function Indentation(indent) {
    _classCallCheck(this, Indentation);

    this.indent = indent || '  ';
    this.indentTypes = [];
  }
  /**
   * Returns current indentation string.
   * @return {String}
   */


  _createClass(Indentation, [{
    key: "getIndent",
    value: function getIndent() {
      return this.indent.repeat(this.indentTypes.length);
    }
    /**
     * Increases indentation by one top-level indent.
     */

  }, {
    key: "increaseTopLevel",
    value: function increaseTopLevel() {
      this.indentTypes.push(INDENT_TYPE_TOP_LEVEL);
    }
    /**
     * Increases indentation by one block-level indent.
     */

  }, {
    key: "increaseBlockLevel",
    value: function increaseBlockLevel() {
      this.indentTypes.push(INDENT_TYPE_BLOCK_LEVEL);
    }
    /**
     * Decreases indentation by one top-level indent.
     * Does nothing when the previous indent is not top-level.
     */

  }, {
    key: "decreaseTopLevel",
    value: function decreaseTopLevel() {
      if (this.indentTypes.length > 0 && (0, _utils.last)(this.indentTypes) === INDENT_TYPE_TOP_LEVEL) {
        this.indentTypes.pop();
      }
    }
    /**
     * Decreases indentation by one block-level indent.
     * If there are top-level indents within the block-level indent,
     * throws away these as well.
     */

  }, {
    key: "decreaseBlockLevel",
    value: function decreaseBlockLevel() {
      while (this.indentTypes.length > 0) {
        var type = this.indentTypes.pop();

        if (type !== INDENT_TYPE_TOP_LEVEL) {
          break;
        }
      }
    }
  }, {
    key: "resetIndentation",
    value: function resetIndentation() {
      this.indentTypes = [];
    }
  }]);

  return Indentation;
}();

exports["default"] = Indentation;
module.exports = exports.default;