@xuda.io/xuda-dbs-plugin-xuda/server.js

Xuda Database Socket for Xuda's proprietary structure powered by CouchDB

const _ = require('lodash');
const crypto = require('node:crypto');

const check_unique = async function (e, docP, table_obj, db, app_id_reference) {
  var len = docP.udfIndex.length;
  if (!len) {
    return { code: -11, data: 'table must have primary index' };
  }
  var found_unique = undefined;
  var ret = { code: 1, data: 'ok' };

  for await (var val of docP.udfIndex) {
    if (!table_obj.tableIndexes) {
      ret = {
        code: -14,
        data: 'table definition missing for: ' + val.fileId,
      };
      break;
    }

    const table_index = find_item_by_key_root(table_obj.tableIndexes, 'id', val.indexId);

    if (!table_index) {
      ret = {
        code: -13,
        data: 'keys definition missing for Table: ' + val.fileId,
      };
      break;
    }

    if (!table_index.data.unique) {
      continue;
    }
    if (!table_index?.data?.keys || _.isEmpty(table_index.data.keys)) {
      ret = {
        code: -14,
        data: 'keys definition missing for index: ' + val.indexId,
      };
      break;
    }

    var keysArr = table_index.data.keys;
    var keyValue = [];

    for await (const [keySegment, valSegment] of Object.entries(keysArr)) {
      // run on key segment
      let _fieldType = find_item_by_key(table_obj.tableFields, 'field_id', valSegment).props.fieldType;
      let _val = await get_cast_val('check_unique', valSegment, _fieldType, val.keyValue[Number(keySegment)]);
      keyValue.push(_val);
    }

    var key = '["' + val.fileId + '","' + val.indexId + '",[' + keyValue.join(',') + ']]';
    try {
      e.view = 'db_index';
      const ret = await query_db(e, db, app_id_reference, table_obj);
      const json = ret.data;

      // var data;

      if (json.code > 0) {
        var data = json.data;
        if (data?.rows?.length) {
          for await (var val of data.rows) {
            if (val.id !== docP._id) {
              found_unique = true;
            }
          }
          if (found_unique) {
            throw 'error checking unique:' + key;
          }
        }
      }
      // throw json.data;
      return { code: 1, data: 'ok' };
    } catch (msg) {
      console.error(msg);
      ret = { code: -22, data: msg };
      break;
    }
  }

  return ret;
};

const get_index_json = async function (docInP, table_obj) {
  try {
    var keysArr = [];
    var index_json = [];
    var key_val = [];

    if (docInP.udfData && table_obj) {
      // check for udf data array
      if (table_obj.tableIndexes) {
        // console.log(udfDicIndexT.rows);
        for await (var valIndex of table_obj.tableIndexes) {
          // run on index rows
          keysArr = valIndex.data.keys; // create array from keys string segment
          key_val = [];
          for await (var valSegment of keysArr) {
            // run on key segment
            // find keys values
            if (docInP.udfData.data[valSegment]) {
              key_val.push(docInP.udfData.data[valSegment]);
              continue;
            }
            // put the value
            // debugger;
            const field_obj = find_item_by_key(table_obj.tableFields, 'field_id', valSegment);
            if (!field_obj) {
              throw 'field not found in key: ' + valSegment;
            }

            let _val = await get_cast_val('get_index_json', field_obj.id, field_obj.props.fieldType, null);
            key_val.push(_val);
          }

          index_json.push({
            fileId: docInP.udfData.udffileid,
            indexId: valIndex.id,
            keySegments: keysArr,
            keyValue: key_val,
          });
        }
        // );
      }
    }
    return { code: 1, data: index_json };
  } catch (msg) {
    return { code: -1, data: msg };
  }
};

const find_item_by_key_root = function (arr, key, val) {
  return _.find(arr, function (e) {
    return e[key] === val;
  });
};

const find_item_by_key = function (arr, key, val) {
  return _.find(arr, function (e) {
    return e.data[key] === val;
  });
};

const get_cast_val = async function (source, attributeP, typeP, valP) {
  const module = require('@xuda.io/xu_cast');

  return module.cast(
    typeP,
    valP,
    function (res) {
      var msg = `error converting  ${attributeP} from ${valP} to ${typeP}`;
      console.error(source, msg);
    },
    function (res) {
      var msg = `type mismatch auto conversion made to ${attributeP} from value ${valP} to ${typeP}`;
      console.warn(source, msg);
    },
  );
};

const get_opt = function (e, table_obj) {
  var limit = 99999;
  var skip = 0;

  if (e.limit) {
    limit = Number(e.limit);
  }

  if (e.skip) {
    skip = JSON.parse(e.skip);
  }

  var fields = [];
  if (e.fields) {
    for (const [key, val] of Object.entries(typeof e.fields === 'string' ? e.fields.split(',') : e.fields)) {
      fields.push(val);
    }
  } else {
    for (const [key, val] of Object.entries(table_obj.tableFields)) {
      fields.push(val.data.field_id);
    }
  }

  var data = {};
  var from = e.filter_from ? JSON.parse(e.filter_from) : {};
  var to = e.filter_to ? JSON.parse(e.filter_to) : {};
  var sort = [];
  for (const [key, val] of Object.entries(from)) {
    var field_name = key;

    sort.push(field_name);

    if (val === to[key]) {
      data[field_name] = val;
    } else {
      data[field_name] = { $gte: val };
    }
  }

  for (const [key, val] of Object.entries(to)) {
    var field_name = key;

    if (val !== from[key]) {
      data[field_name]['$lte'] = val;
    }
  }

  var selector = {};

  if (from && !_.isEmpty(from)) {
    selector = data;
  }

  var opt = {
    selector,
    limit,
    skip,
    fields,
  };

  if (sort.length) {
    opt.sort = sort;
  }

  let _sortModel = e?.sortModel || [];
  if (typeof _sortModel === 'string') {
    _sortModel = JSON.parse(e.sortModel);
  }

  if (_sortModel.length) {
    opt.sort = _sortModel;
    if (opt.sort) {
      for (const [key, val] of Object.entries(opt.sort)) {
        var field_name = val.field_id || val.colId;
        opt.sort[key] = {
          ['udfData.data.' + field_name]: val.sort_dir || val.sort,
        };
      }
    }
  }

  if (e.total_fields_info) {
    fields = [];
    for (const [key, val] of Object.entries(JSON.parse(e.total_fields_info))) {
      var field_name = val.field_id;

      fields.push(field_name);
    }
    opt.fields = fields;
  }
  // fix names

  for (const [key, val] of Object.entries(opt.fields)) {
    opt.fields[key] = 'udfData.data.' + val;
  }

  const _sort_model = typeof e.sortModel === 'string' ? JSON.parse(e.sortModel) : e.sortModel;

  // if (!e?.sortModel || !JSON.parse(e.sortModel).length) {
  if (!e?.sortModel || !_sort_model.length) {
    // added 2021 09 10
    if (opt.sort) {
      for (const [key, val] of Object.entries(opt.sort)) {
        opt.sort[key] = {
          ['udfData.data.' + val]: e.sortOrder === 'des' ? 'desc' : 'asc',
        };
      }
    }
  }

  var selector_new = {};

  function replaceKeysInQuery(query) {
    const keys_to_replace = table_obj.tableFields.map((e) => {
      return e?.data?.field_id;
    });

    // Helper function to recursively process the query object
    function recursiveReplace(obj) {
      if (typeof obj === 'object' && obj !== null) {
        // Create a new object to store the modified query
        let newObj = Array.isArray(obj) ? [] : {};

        // Traverse through the object
        for (let key in obj) {
          if (obj.hasOwnProperty(key)) {
            // If the key is in the keys_to_replace array, replace it
            let newKey = keys_to_replace.includes(key) ? `udfData.data.${key}` : key;

            // Recursively process nested objects
            newObj[newKey] = recursiveReplace(obj[key]);
          }
        }

        return newObj;
      } else {
        // If it's not an object or array, return the value as is
        return obj;
      }
    }

    // Start the recursive replacement
    return recursiveReplace(query);
  }

  function replaceRegexOptions(query) {
    // Helper function to recursively process the query object
    function recursiveReplace(obj) {
      if (typeof obj === 'object' && obj !== null) {
        // Create a new object to store the modified query
        let newObj = Array.isArray(obj) ? [] : {};

        // Traverse through the object
        for (let key in obj) {
          if (obj.hasOwnProperty(key)) {
            if (key === '$regex') {
              newObj[key] = obj.$options ? `(?${obj.$options})${obj[key]}` : obj[key];
              return newObj;
            }

            // Recursively process nested objects

            newObj[key] = recursiveReplace(obj[key]);
          }
        }

        return newObj;
      } else {
        // If it's not an object or array, return the value as is
        return obj;
      }
    }

    // Start the recursive replacement
    return recursiveReplace(query);
  }

  if (e.dataSourceFilterModelType === 'query' && e.filterModelMongo) {
    // selector_new['$and'] = [replaceRegexOptions(replaceKeysInQuery(JSON.parse(e.filterModelMongo)))];
    selector_new['$and'] = [replaceRegexOptions(replaceKeysInQuery(typeof e.filterModelMongo === 'string' ? JSON.parse(e.filterModelMongo) : e.filterModelMongo))];
  }

  const _filterModelUserMongo = typeof e.filterModelUserMongo === 'string' ? JSON.parse(e.filterModelUserMongo) : e.filterModelUserMongo;

  if (!_.isEmpty(_filterModelUserMongo)) {
    if (!selector_new['$and']) {
      selector_new['$and'] = [];
    }
    selector_new['$and'].push(replaceRegexOptions(replaceKeysInQuery(_filterModelUserMongo)));
  }

  if (e.dataSourceFilterModelType === 'index') {
    for (const [key, val] of Object.entries(opt.selector)) {
      selector_new['udfData.data.' + key] = val;
    }
  }

  opt.selector = selector_new;
  opt.selector['udfData.udffileid'] = e.table_id;
  opt.selector['docType'] = 'database';
  opt.selector.stat = e.archived ? 4 : 3;

  opt.fields.push('_id');
  opt.fields.push('_rev');

  if (e.selector) {
    opt.selector = { ...e.selector, ...opt.selector };
  }

  return opt;
};

const query_db = async function (e, db, app_id_reference, table_obj) {
  var key = undefined;
  var opt = get_opt(e, table_obj);
  const runtime_get_mango_data = async function () {
    const done = async function (body) {
      const raw_data = async function () {
        var rows = [];

        for (var val of body.docs) {
          var data = {};
          if (e.fields) {
            for (const [key2, val2] of Object.entries(typeof e.fields === 'string' ? e.fields.split(',') : e.fields)) {
              if (val.udfData) {
                data[val2] = val['udfData']['data'][val2];
              } else {
                data[val2] = null;
              }
            }
          } else {
            for (const [key2, val2] of Object.entries(table_obj.tableFields)) {
              if (val.udfData) {
                data[val2.data.field_id] = val['udfData']['data'][val2.data.field_id];
              } else {
                data[val2.data.field_id] = null;
              }
            }
          }

          rows.push({
            id: val._id,
            value: data,
          });
        }

        return { code: 1, data: { rows: rows, total_rows: rows.length, opt } };
      };
      const count_data = async function () {
        var rows = [];
        var keys_obj = {};
        const table_index = find_item_by_key_root(table_obj.tableIndexes, 'id', e.indexId);
        if (e.indexId && table_index) {
          var index_keys = table_index.data.keys;
          var index_id = e.indexId;

          for (var val of body.docs) {
            var data = {};
            const _tableFieldsObj = find_item_by_key(table_obj.tableFields, 'field_id', e.field_id);

            for (const [key2, val2] of Object.entries(table_obj.tableFields)) {
              data[val2.data.field_id] = val['udfData']['data'][val2.data.field_id];
            }

            var key_arr = [];

            for (const [key_idx, key_name] of Object.entries(index_keys)) {
              key_arr.push(data[key_name]);
            }
            keys_obj[key_arr]++;
          }

          for (const [key_arr, key_count] of Object.entries(keys_obj)) {
            rows.push({
              key: [e.key, index_id, key_arr],
              value: body.docs.length,
            });
          }
        } else {
          // no index
          rows.push({ key: '', value: body.docs.length });
        }
        return { code: 1, data: { rows: rows, total_rows: rows.length, opt } };
      };

      const totals = async function () {
        const median = (arr) => {
          const mid = Math.floor(arr.length / 2),
            nums = [...arr].sort((a, b) => a - b);
          return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
        };

        var total_fields_info = JSON.parse(e.total_fields_info);
        var totals_prop = {};
        var totals_obj = {};
        var totals_counts = {};
        var totals_arr = {};
        var totals_sums = {};
        var totals_group_obj = {};

        for (const [key, val] of Object.entries(total_fields_info)) {
          totals_counts[val.field_id] = 0;
          totals_prop[val.field_id] = val;
          totals_arr[val.field_id] = [];
          totals_sums[val.field_id] = 0;
          totals_group_obj[val.field_id] = {};
        }

        for (var row_data of body.docs) {
          for (const [key, val] of Object.entries(row_data.udfData.data)) {
            var field_id = key;
            var value = val;
            totals_counts[field_id]++;

            switch (totals_prop[field_id].sum_type) {
              case 'sum':
                if (typeof totals_obj[field_id] === 'undefined') {
                  totals_obj[field_id] = value;
                } else {
                  totals_obj[field_id] += value;
                }
                break;

              case 'average':
                totals_sums[field_id] += value;
                totals_obj[field_id] = totals_sums[field_id] / totals_counts[field_id];
                break;

              case 'median':
                if (!totals_arr[field_id].includes(value)) {
                  totals_arr[field_id].push(value);
                }
                totals_obj[field_id] = median(totals_arr[field_id]);
                break;
              case 'min':
                if (typeof totals_obj[field_id] === 'undefined' || value < totals_obj[field_id]) {
                  totals_obj[field_id] = value;
                }
                break;
              case 'max':
                if (typeof totals_obj[field_id] === 'undefined' || value > totals_obj[field_id]) {
                  totals_obj[field_id] = value;
                }
                break;
              case 'count':
                if (typeof totals_obj[field_id] === 'undefined') {
                  totals_obj[field_id] = 1;
                } else {
                  totals_obj[field_id]++;
                }
                break;
              case 'distinct':
                if (!totals_arr[field_id].includes(value)) {
                  totals_arr[field_id].push(value);
                }
                totals_obj[field_id] = totals_arr[field_id].length;
                break;

              case 'group':
                if (!totals_obj[field_id]) {
                  totals_obj[field_id] = {};
                }

                if (typeof totals_obj[field_id][value] === 'undefined') {
                  totals_obj[field_id][value] = 1; //value;
                } else {
                  totals_obj[field_id][value]++; //+= value;
                }

                break;
              default:
                totals_obj[field_id] = null;
            }
          }
        }
        return { code: 1, data: totals_obj };
      };
      if (e.count) {
        return count_data();
      }
      if (e.total_fields_info) {
        return totals();
      }
      return raw_data();
    };

    // xuda

    try {
      try {
        // console.log("opt", opt);
        const doc = await db.find(opt);
        var mango_index_obj;
        if (doc?.warning?.includes('No matching index found')) {
          const index_name = `index_${e.table_id}_${new Date().valueOf().toString()}`;
          var index = [];

          for (const [key, val] of Object.entries(opt.selector)) {
            index.push(key);
          }
          mango_index_obj = {
            index: {
              fields: index,
            },
            name: index_name,
            ddoc: `mango_index_table_${e.table_id}`,
          };
          db.createIndex(mango_index_obj).then((result) => {
            console.log(result);
          });
        }
        return await done(doc);
      } catch (err) {
        if (err.error === 'no_usable_index') {
          const index_name = `index_${e.table_id}_${new Date().valueOf().toString()}`;
          const _selector = _.cloneDeep(opt.selector);
          delete _selector['$and'];
          const _sort = _.cloneDeep(opt.sort);
          mango_index_obj = {
            index: {
              fields: Object.keys(
                _.reduce(
                  _sort,
                  (ret, val) => {
                    ret[Object.keys(val)[0]] = val;
                    return ret;
                  },
                  _selector,
                ),
              ),
            },
            name: index_name,
            ddoc: `mango_index_table_${e.table_id}`,
          };

          try {
            const result = await db.createIndex(mango_index_obj);

            const doc = await db.find(opt);
            return await done(doc);
          } catch (err) {
            return { code: -1, data: err.message };
          }
        } else {
          return { code: -1, data: err.message, opt };
        }
      }
    } catch (err) {
      return { code: -1, data: err.message };
    }
  };

  const runtime_get_query_data = async function () {
    var limit = 99999999;
    var skip = 0;

    if (e.limit) {
      limit = e.limitP;
    }

    if (e.skipP) {
      skip = e.skipP;
    }

    var view_opt = undefined;
    if (key) {
      view_opt = {
        key,
        include_docs: !e.ids && view !== 'db_index_reduce',
        limit,
        skip,
      };
    } else {
      if (e.reduce) {
        view_opt = {
          startkey: e.startkey ? JSON.parse(e.startkey) : '',
          endkey: e.endkey ? JSON.parse(e.endkey) : '',
          include_docs: false,
          reduce: true,
          group_level: 3,

          descending: e.desc,
        };
      } else {
        view_opt = {
          startkey: e.startkey ? JSON.parse(e.startkey) : '',
          endkey: e.endkey ? JSON.parse(e.endkey) : '',
          include_docs: !e.ids,
          limit,
          skip,
          descending: e.desc,
        };
      }
    }

    try {
      const body = await db.view(`xuda`, view, view_opt);
      if (e.reduce) {
        let rows = [];

        const table_index = find_item_by_key_root(table_obj.tableIndexes, 'id', e.indexId);

        for await (var val of body.rows) {
          const arr = val.key[2];

          var obj = {};
          for await (const [arr_key, arr_val] of Object.entries(arr)) {
            let field_id = table_index.data.keys[Number(arr_key)];

            const _tableFieldsObj = find_item_by_key(table_obj.tableFields, 'field_id', field_id);

            let field_value = await get_cast_val('dbs_update', e.field_id, _tableFieldsObj.props.fieldType, arr_val);

            obj[field_id] = field_value;
          }
          obj['REDUCE_VALUE'] = val.value;

          rows.push({ id: crypto.randomUUID(), value: obj });
        }
        return { code: 1, data: { rows, opt } };
      }

      var rows = [];

      for await (var val of body.rows) {
        if (e.ids) {
          rows.push({ id: val.id, value: val.value._id });
          continue;
        }
        rows.push({
          id: val.id,
          value: val.doc.udfData,
          // value: { udfData: val.doc.udfData, _id: val.id },
        });
      }

      // const reduce_rows = () => {
      // const reduce_obj = body.docs.reduce(
      //   (params, data) => {
      //     const fx = (val, idx) => {
      //       const group_by_field = data[params.sort[idx]];

      //       if (params.sort[idx + 1]) {
      //         val[group_by_field] = val[group_by_field] ?? {};
      //         val[group_by_field][data[params.sort[idx + 1]]] = 0;
      //         idx++;
      //         fx(val[group_by_field], idx);
      //         return;
      //       }

      //       val[group_by_field] = val[group_by_field] ?? 0;
      //       val[group_by_field] += 1;
      //     };
      //     fx(params.group, 0);

      //     return params;
      //   },
      //   { sort: opt.sort, group: {} }
      // );}

      return { code: 1, data: { rows: rows, total_rows: rows.length, opt } };
    } catch (err) {
      return { code: -1, data: err.message };
    }
  };

  const count_tables = async function () {
    var opt = {
      reduce: true,
      group_level: 1,
    };

    if (e.table_id) {
      opt.key = e.table_id;
    }

    const body = await db.view(`xuda`, 'db_table_counts', opt);

    return { code: 1, data: body };
  };
  var view;
  if (e.reduce && JSON.parse(e.reduce)) {
    view = 'db_index_reduce';
    return await runtime_get_query_data();
  }
  if (e.view === 'db_index') {
    key = e.key;
    view = e.view;
    return await runtime_get_query_data();
  }

  if (e.count && !e.filter_from) {
    // count tables
    return await count_tables();
  }

  return await runtime_get_mango_data();
};

exports.create = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;

  const create_data_obj = async function (table_data) {
    var doc = {};
    for await (const val of table_obj.tableFields) {
      doc[val.data.field_id] = await get_cast_val('dbs_create', val.data.field_id, val.props.fieldType, table_data[val.data.field_id]);
    }

    return doc;
  };

  const get_uuid = function (table_id) {
    return 'dbs-' + table_id + '_' + crypto.randomUUID();
  };
  const batch = async function () {
    var docs = [];
    try {
      for await (var val of e.table_data) {
        var doc = {
          _id: get_uuid(e.table_id),
          docType: 'database',
          user: e.uid,
          app_id: e.app_id,
          stat: 3,
          udfData: {
            udffileid: e.table_id,
            data: await create_data_obj(val),
            error: {},
          },

          ts: Date.now(),
          date: Date.now(),
        };
        const index_ret = await get_index_json(doc, table_obj);
        if (index_ret < 0) throw index_ret.data;
        doc.udfIndex = index_ret.data;

        const ret = await check_unique(e, doc, table_obj, db, app_id_reference);
        if (ret.code < 0) {
          throw ret;
        }
        docs.push(doc);
      }
      try {
        const body = await db.bulk({ docs: docs });
        return resolve(body);
      } catch (error) {
        return reject(error);
      }
    } catch (msg) {
      return reject(msg);
    }
  };
  const single = async function () {
    var doc = {
      _id: get_uuid(e.table_id),
      docType: 'database',
      user: e.uid,
      app_id: e.app_id,
      stat: 3,
      udfData: {
        udffileid: e.table_id,
        data: await create_data_obj(e.table_data),
        error: {},
      },

      ts: Date.now(),
      date: Date.now(),
    };
    const index_ret = await get_index_json(doc, table_obj);
    if (index_ret.code < 0) {
      return index_ret;
    }
    doc.udfIndex = index_ret.data;
    const ret = await check_unique(e, doc, table_obj, db, app_id_reference);
    if (ret.code < 0) {
      return reject(ret.data);
    }
    try {
      const body = await db.insert(doc);
      return resolve(body);
    } catch (error) {
      return reject(error);
    }
  };
  if (Array.isArray(e.table_data)) {
    return await batch();
  }
  return await single();
};
exports.read = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;

  const ret = await query_db(e, db, app_id_reference, table_obj);
  if (ret.code < 0) {
    return reject(ret.data);
  }

  return resolve(ret.data);
};
exports.update = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;
  try {
    if (e.row_id === 'newRecord') {
      return this.create(params, setup_doc, resolve, reject);
    }
    var doc = await db.get(e.row_id, {});
    // let data = doc.udfData.data;
    var error = undefined;
    if (!e.field_id && !e.table_data) {
      error = 'Invalid field_id or table_data object to save';
      return reject(error);
    }
    // single value save
    if (e.field_id) {
      let _tableFieldsObj = find_item_by_key(table_obj.tableFields, 'field_id', e.field_id);
      if (!_tableFieldsObj || _.isEmpty(_tableFieldsObj)) {
        return reject('Error: ' + e.field_id + ' - field not found');
      }

      doc.udfData.data[e.field_id] = await get_cast_val('dbs_update', e.field_id, _tableFieldsObj.props.fieldType, e.field_value);
    }

    // object value save
    if (e.table_data) {
      // data = {};
      for await (const [key, val] of Object.entries(e.table_data)) {
        let _tableFieldsObj = find_item_by_key(table_obj.tableFields, 'field_id', key);
        if (!_tableFieldsObj || _.isEmpty(_tableFieldsObj)) {
          reject('Error: ' + key + ' - field not found');
          break;
        }

        doc.udfData.data[key] = await get_cast_val('dbs_update', key, _tableFieldsObj.props.fieldType, val);
      }
    }

    if (error) {
      return reject(error);
    }
    doc.ts = Date.now();
    const index_ret = await get_index_json(doc, table_obj);
    if (index_ret.code < 0) {
      return index_ret;
    }
    doc.udfIndex = index_ret.data;
    const ret = await check_unique(e, doc, table_obj, db, app_id_reference);
    if (ret.code < 0) {
      return ret;
    }
    try {
      const body = await db.insert(doc);
      return resolve(body);
    } catch (error) {
      return reject(error);
    }
  } catch (error) {
    return reject(error);
  }
};
exports.delete = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;
  const data = await db.fetch({ keys: e.ids });
  var docs_to_delete = [];

  for await (var val of data.rows) {
    var doc = val.doc;

    if (doc && doc._id) {
      if (e.permanent) {
        docs_to_delete.push({
          _id: doc._id,
          _rev: doc._rev,
          _deleted: true,
        });
      } else {
        doc.stat = 4;
        doc.ts = Date.now();
        docs_to_delete.push(doc);
      }
    }
  }
  try {
    await db.bulk({ docs: docs_to_delete });
    resolve(docs_to_delete);
  } catch (error) {
    return { code: -110, data: error };
  }
};

exports.restore = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;
  var docs_to_restore = [];
  const data = await db.fetch({ keys: e.ids });

  for await (var val of data.rows) {
    var doc = val.doc;

    if (doc && doc._id) {
      doc.stat = 3;
      doc.ts = Date.now();
      docs_to_restore.push(doc);
    }
  }

  try {
    await db.bulk({ docs: docs_to_restore });
    resolve(docs_to_restore);
  } catch (error) {
    return reject(error);
  }
};
exports.check_unique = async (params, setup_doc, resolve, reject) => {
  const e = params.e;
  const db = params.db;
  const app_id_reference = params.app_id_reference;
  const table_obj = params.table_obj;
  const doc = params.e.doc;
  try {
    const ret = await check_unique(e, doc, table_obj, db, app_id_reference);
    if (ret.code < 0) {
      throw ret;
    }

    resolve(ret);
  } catch (error) {
    return reject(error);
  }
};
exports.get_connection = async (params, setup_doc, resolve, reject) => {
  try {
    if (!setup_doc.db_connection_string) throw 'db_connection_string missing';
    const nano = require('nano')(setup_doc.db_connection_string);

    if (!nano) {
      return reject('connection error');
    }
    await nano.get('_design/xuda');
    resolve(nano);
  } catch (err) {
    return reject(err.message || err);
  }
};