nocodb/lib/util/data.helper.js

"use strict";

exports.findOrInsertObjectArrayByKey = (obj, key, array) => {
  let found = 0;
  let i = 0;

  for (i = 0; i < array.length; ++i) {
    if (key in array[i]) {
      if (obj[key] === array[i][key]) {
        found = 1;
        break;
      }
    }
  }

  if (!found) {
    array.push(obj);
  }

  return array[i];
};

exports.findObjectInArrayByKey = (key, value, objArray) => {
  for (let i = 0; i < objArray.length; ++i) {
    if (objArray[i][key] === value) {
      return objArray[i];
    }
  }

  return null;
};

exports.round = function(number, precision) {
  var factor = Math.pow(10, precision);
  var tempNumber = number * factor;
  var roundedTempNumber = Math.round(tempNumber);
  return roundedTempNumber / factor;
};

exports.numberRound = (number, precision) => {
  var factor = Math.pow(10, precision);
  var tempNumber = number * factor;
  var roundedTempNumber = Math.round(tempNumber);
  return roundedTempNumber / factor;
};

exports.numberGetLength = number => {
  var n = number;

  if (number < 0) {
    n = n * -1;
  }

  return n.toString().length;
};

exports.numberGetFixed = number => {
  //console.log(number, typeof number);
  return parseInt(number.toFixed());
};

exports.getStepArraySimple = function(min, max, step) {
  var arr = [];
  for (var i = min; i <= max; i = i + step) {
    arr.push(i);
  }

  return arr;
};

exports.getStepArray = (min, max, stddev) => {
  // console.log(' = = = = = = = ');
  //console.log('original numbers', min, max, stddev);

  min = this.numberGetFixed(min);
  max = this.numberGetFixed(max);
  stddev = this.numberGetFixed(stddev);

  // console.log('fixed numbers', min, max, stddev);

  let minMinusHalf = min - stddev / 2;
  let maxMinusHalf = max + stddev / 2;

  minMinusHalf = this.numberGetFixed(minMinusHalf);
  maxMinusHalf = this.numberGetFixed(maxMinusHalf);

  // console.log('fixed numbers + (min,max)', min, max, stddev, '(', minMinusHalf, ',', maxMinusHalf, ')');
  // console.log('numbers length', 'min', numberGetLength(min), 'max', numberGetLength(max), 'stddev', numberGetLength(stddev));

  let minLen = this.numberGetLength(minMinusHalf);
  let maxLen = this.numberGetLength(maxMinusHalf);
  let stddevLen = this.numberGetLength(stddev);
  //
  // console.log('- - - -');
  // console.log('Range', 'min', numberRound(minMinusHalf, -1));
  // console.log('Range', 'max', numberRound(maxMinusHalf, -1));
  // console.log('Range', 'stddev', numberRound(stddev, -1));

  if (minLen > 1) minMinusHalf = this.numberRound(minMinusHalf, -1);

  if (maxLen > 2) maxMinusHalf = this.numberRound(maxMinusHalf, -1);

  if (stddevLen !== 1) stddev = this.numberRound(stddev, -1);

  var arr = [];
  for (var step = minMinusHalf; step < maxMinusHalf; step = step + stddev) {
    arr.push(step);
  }
  arr.push(maxMinusHalf);

  // console.log(arr);

  return arr;
};

exports.getSchemaQuery = function() {
  return (
    "select c.table_name, c.column_name, c.ordinal_position,c.column_key,c.is_nullable, c.data_type, c.column_type,c.extra,c.privileges, " +
    "c.column_comment,c.column_default,c.data_type,c.character_maximum_length, " +
    "k.constraint_name, k.referenced_table_name, k.referenced_column_name, " +
    "s.index_name,s.seq_in_index, " +
    "v.table_name as isView " +
    "from " +
    "information_schema.columns as c " +
    "left join " +
    "information_schema.key_column_usage as k " +
    "on " +
    "c.column_name=k.column_name and " +
    "c.table_schema = k.referenced_table_schema and " +
    "c.table_name = k.table_name " +
    "left join " +
    "information_schema.statistics as s " +
    "on " +
    "c.column_name = s.column_name and " +
    "c.table_schema = s.index_schema and " +
    "c.table_name = s.table_name " +
    "LEFT JOIN " +
    "information_schema.VIEWS as v " +
    "ON " +
    "c.table_schema = v.table_schema and " +
    "c.table_name = v.table_name " +
    "where " +
    "c.table_schema=? " +
    "order by " +
    "c.table_name, c.ordinal_position"
  );
};

exports.getChartQuery = function() {
  return "select ? as ??, count(*) as _count from ?? where ?? between ? and ? ";
};

exports.getDataType = function(colType, typesArr) {
  // console.log(colType,typesArr);
  for (let i = 0; i < typesArr.length; ++i) {
    if (colType.indexOf(typesArr[i]) !== -1) {
      return 1;
    }
  }
  return 0;
};

exports.getColumnType = function(column) {
  let strTypes = [
    "varchar",
    "text",
    "char",
    "tinytext",
    "mediumtext",
    "longtext",
    "blob",
    "mediumblob",
    "longblob",
    "tinyblob",
    "binary",
    "varbinary"
  ];
  let intTypes = ["int", "long", "smallint", "mediumint", "bigint", "tinyint"];
  let flatTypes = ["float", "double", "decimal"];
  let dateTypes = ["date", "datetime", "timestamp", "time", "year"];

  //console.log(column);
  if (this.getDataType(column["data_type"], strTypes)) {
    return "string";
  } else if (this.getDataType(column["data_type"], intTypes)) {
    return "int";
  } else if (this.getDataType(column["data_type"], flatTypes)) {
    return "float";
  } else if (this.getDataType(column["data_type"], dateTypes)) {
    return "date";
  } else {
    return "string";
  }
};

exports.getType = function(colType, typesArr) {
  for (let i = 0; i < typesArr.length; ++i) {
    // if (typesArr[i].indexOf(colType) !== -1) {
    //   return 1;
    // }

    if (colType.indexOf(typesArr[i]) !== -1) {
      return 1;
    }
  }
  return 0;
};