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const _ = require('lodash');
const util = require('util');
let dseDriver;
try {
// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved
dseDriver = require('dse-driver');
} catch (e) {
dseDriver = null;
}
const cql = Promise.promisifyAll(dseDriver || require('cassandra-driver'));
const buildError = require('../orm/apollo_error.js');
const datatypes = require('../validators/datatypes');
const schemer = require('../validators/schema');
const parser = {};
parser.callback_or_throw = function f(err, callback) {
Eif (typeof callback === 'function') {
callback(err);
return;
}
throw (err);
};
parser.extract_type = function f(val) {
// decompose composite types
const decomposed = val ? val.replace(/[\s]/g, '').split(/[<,>]/g) : [''];
for (let d = 0; d < decomposed.length; d++) {
Eif (_.has(datatypes, decomposed[d])) {
return decomposed[d];
}
}
return val;
};
parser.extract_typeDef = function f(val) {
// decompose composite types
let decomposed = val ? val.replace(/[\s]/g, '') : '';
decomposed = decomposed.substr(decomposed.indexOf('<'), decomposed.length - decomposed.indexOf('<'));
return decomposed;
};
parser.extract_altered_type = function f(normalizedModelSchema, diff) {
const fieldName = diff.path[0];
let type = '';
if (diff.path.length > 1) {
if (diff.path[1] === 'type') {
type = diff.rhs;
if (normalizedModelSchema.fields[fieldName].typeDef) {
type += normalizedModelSchema.fields[fieldName].typeDef;
}
} else {
type = normalizedModelSchema.fields[fieldName].type;
type += diff.rhs;
}
} else {
type = diff.rhs.type;
if (diff.rhs.typeDef) type += diff.rhs.typeDef;
}
return type;
};
parser.get_db_value_expression = function f(schema, fieldName, fieldValue) {
if (fieldValue == null || fieldValue === cql.types.unset) {
return { query_segment: '?', parameter: fieldValue };
}
if (_.isPlainObject(fieldValue) && fieldValue.$db_function) {
return fieldValue.$db_function;
}
const fieldType = schemer.get_field_type(schema, fieldName);
const validators = schemer.get_validators(schema, fieldName);
if (_.isArray(fieldValue) && fieldType !== 'list' && fieldType !== 'set' && fieldType !== 'frozen') {
const val = fieldValue.map((v) => {
const dbVal = parser.get_db_value_expression(schema, fieldName, v);
Eif (_.isPlainObject(dbVal) && dbVal.query_segment) return dbVal.parameter;
return dbVal;
});
return { query_segment: '?', parameter: val };
}
const validationMessage = schemer.get_validation_message(validators, fieldValue);
if (typeof validationMessage === 'function') {
throw (buildError('model.validator.invalidvalue', validationMessage(fieldValue, fieldName, fieldType)));
}
if (fieldType === 'counter') {
let counterQuerySegment = util.format('"%s"', fieldName);
if (fieldValue >= 0) counterQuerySegment += ' + ?';
else counterQuerySegment += ' - ?';
fieldValue = Math.abs(fieldValue);
return { query_segment: counterQuerySegment, parameter: fieldValue };
}
return { query_segment: '?', parameter: fieldValue };
};
parser.unset_not_allowed = function f(operation, schema, fieldName, callback) {
Iif (schemer.is_primary_key_field(schema, fieldName)) {
parser.callback_or_throw(buildError(`model.${operation}.unsetkey`, fieldName), callback);
return true;
}
if (schemer.is_required_field(schema, fieldName)) {
parser.callback_or_throw(buildError(`model.${operation}.unsetrequired`, fieldName), callback);
return true;
}
return false;
};
parser.get_inplace_update_expression = function f(schema, fieldName, fieldValue, updateClauses, queryParams) {
const $add = (_.isPlainObject(fieldValue) && fieldValue.$add) || false;
const $append = (_.isPlainObject(fieldValue) && fieldValue.$append) || false;
const $prepend = (_.isPlainObject(fieldValue) && fieldValue.$prepend) || false;
const $replace = (_.isPlainObject(fieldValue) && fieldValue.$replace) || false;
const $remove = (_.isPlainObject(fieldValue) && fieldValue.$remove) || false;
fieldValue = $add || $append || $prepend || $replace || $remove || fieldValue;
const dbVal = parser.get_db_value_expression(schema, fieldName, fieldValue);
if (!_.isPlainObject(dbVal) || !dbVal.query_segment) {
updateClauses.push(util.format('"%s"=%s', fieldName, dbVal));
return;
}
const fieldType = schemer.get_field_type(schema, fieldName);
if (['map', 'list', 'set'].includes(fieldType)) {
if ($add || $append) {
dbVal.query_segment = util.format('"%s" + %s', fieldName, dbVal.query_segment);
} else if ($prepend) {
Eif (fieldType === 'list') {
dbVal.query_segment = util.format('%s + "%s"', dbVal.query_segment, fieldName);
} else {
throw (buildError(
'model.update.invalidprependop',
util.format('%s datatypes does not support $prepend, use $add instead', fieldType),
));
}
} else if ($remove) {
dbVal.query_segment = util.format('"%s" - %s', fieldName, dbVal.query_segment);
if (fieldType === 'map') dbVal.parameter = Object.keys(dbVal.parameter);
}
}
if ($replace) {
if (fieldType === 'map') {
updateClauses.push(util.format('"%s"[?]=%s', fieldName, dbVal.query_segment));
const replaceKeys = Object.keys(dbVal.parameter);
const replaceValues = _.values(dbVal.parameter);
Eif (replaceKeys.length === 1) {
queryParams.push(replaceKeys[0]);
queryParams.push(replaceValues[0]);
} else {
throw (
buildError('model.update.invalidreplaceop', '$replace in map does not support more than one item')
);
}
} else Eif (fieldType === 'list') {
updateClauses.push(util.format('"%s"[?]=%s', fieldName, dbVal.query_segment));
Eif (dbVal.parameter.length === 2) {
queryParams.push(dbVal.parameter[0]);
queryParams.push(dbVal.parameter[1]);
} else {
throw (buildError(
'model.update.invalidreplaceop',
'$replace in list should have exactly 2 items, first one as the index and the second one as the value',
));
}
} else {
throw (buildError(
'model.update.invalidreplaceop',
util.format('%s datatypes does not support $replace', fieldType),
));
}
} else {
updateClauses.push(util.format('"%s"=%s', fieldName, dbVal.query_segment));
queryParams.push(dbVal.parameter);
}
};
parser.get_update_value_expression = function f(instance, schema, updateValues, callback) {
const updateClauses = [];
const queryParams = [];
if (schema.options && schema.options.timestamps) {
Eif (!updateValues[schema.options.timestamps.updatedAt]) {
updateValues[schema.options.timestamps.updatedAt] = { $db_function: 'toTimestamp(now())' };
}
}
if (schema.options && schema.options.versions) {
Eif (!updateValues[schema.options.versions.key]) {
updateValues[schema.options.versions.key] = { $db_function: 'now()' };
}
}
const errorHappened = Object.keys(updateValues).some((fieldName) => {
Iif (schema.fields[fieldName] === undefined || schema.fields[fieldName].virtual) return false;
const fieldType = schemer.get_field_type(schema, fieldName);
let fieldValue = updateValues[fieldName];
Iif (fieldValue === undefined) {
fieldValue = instance._get_default_value(fieldName);
if (fieldValue === undefined) {
return parser.unset_not_allowed('update', schema, fieldName, callback);
} else if (!schema.fields[fieldName].rule || !schema.fields[fieldName].rule.ignore_default) {
// did set a default value, ignore default is not set
if (instance.validate(fieldName, fieldValue) !== true) {
parser.callback_or_throw(buildError('model.update.invaliddefaultvalue', fieldValue, fieldName, fieldType), callback);
return true;
}
}
}
if (fieldValue === null || fieldValue === cql.types.unset) {
Iif (parser.unset_not_allowed('update', schema, fieldName, callback)) {
return true;
}
}
try {
parser.get_inplace_update_expression(schema, fieldName, fieldValue, updateClauses, queryParams);
} catch (e) {
parser.callback_or_throw(e, callback);
return true;
}
return false;
});
return { updateClauses, queryParams, errorHappened };
};
parser.get_save_value_expression = function fn(instance, schema, callback) {
const identifiers = [];
const values = [];
const queryParams = [];
if (schema.options && schema.options.timestamps) {
if (instance[schema.options.timestamps.updatedAt]) {
instance[schema.options.timestamps.updatedAt] = { $db_function: 'toTimestamp(now())' };
}
}
if (schema.options && schema.options.versions) {
if (instance[schema.options.versions.key]) {
instance[schema.options.versions.key] = { $db_function: 'now()' };
}
}
const errorHappened = Object.keys(schema.fields).some((fieldName) => {
if (schema.fields[fieldName].virtual) return false;
// check field value
const fieldType = schemer.get_field_type(schema, fieldName);
let fieldValue = instance[fieldName];
if (fieldValue === undefined) {
fieldValue = instance._get_default_value(fieldName);
if (fieldValue === undefined) {
return parser.unset_not_allowed('save', schema, fieldName, callback);
} else Eif (!schema.fields[fieldName].rule || !schema.fields[fieldName].rule.ignore_default) {
// did set a default value, ignore default is not set
Iif (instance.validate(fieldName, fieldValue) !== true) {
parser.callback_or_throw(buildError('model.save.invaliddefaultvalue', fieldValue, fieldName, fieldType), callback);
return true;
}
}
}
if (fieldValue === null || fieldValue === cql.types.unset) {
Iif (parser.unset_not_allowed('save', schema, fieldName, callback)) {
return true;
}
}
identifiers.push(util.format('"%s"', fieldName));
try {
const dbVal = parser.get_db_value_expression(schema, fieldName, fieldValue);
if (_.isPlainObject(dbVal) && dbVal.query_segment) {
values.push(dbVal.query_segment);
queryParams.push(dbVal.parameter);
} else {
values.push(dbVal);
}
} catch (e) {
parser.callback_or_throw(e, callback);
return true;
}
return false;
});
return {
identifiers,
values,
queryParams,
errorHappened,
};
};
parser.extract_query_relations = function f(fieldName, relationKey, relationValue, schema, validOperators) {
const queryRelations = [];
const queryParams = [];
Iif (!_.has(validOperators, relationKey.toLowerCase())) {
throw (buildError('model.find.invalidop', relationKey));
}
relationKey = relationKey.toLowerCase();
Iif (relationKey === '$in' && !_.isArray(relationValue)) {
throw (buildError('model.find.invalidinop'));
}
Iif (relationKey === '$token' && !(relationValue instanceof Object)) {
throw (buildError('model.find.invalidtoken'));
}
let operator = validOperators[relationKey];
let whereTemplate = '"%s" %s %s';
const buildQueryRelations = (fieldNameLocal, relationValueLocal) => {
const dbVal = parser.get_db_value_expression(schema, fieldNameLocal, relationValueLocal);
Eif (_.isPlainObject(dbVal) && dbVal.query_segment) {
queryRelations.push(util.format(
whereTemplate,
fieldNameLocal, operator, dbVal.query_segment,
));
queryParams.push(dbVal.parameter);
} else {
queryRelations.push(util.format(
whereTemplate,
fieldNameLocal, operator, dbVal,
));
}
};
const buildTokenQueryRelations = (tokenRelationKey, tokenRelationValue) => {
tokenRelationKey = tokenRelationKey.toLowerCase();
Eif (_.has(validOperators, tokenRelationKey) && tokenRelationKey !== '$token' && tokenRelationKey !== '$in') {
operator = validOperators[tokenRelationKey];
} else {
throw (buildError('model.find.invalidtokenop', tokenRelationKey));
}
if (_.isArray(tokenRelationValue)) {
const tokenKeys = fieldName.split(',');
for (let tokenIndex = 0; tokenIndex < tokenRelationValue.length; tokenIndex++) {
tokenKeys[tokenIndex] = tokenKeys[tokenIndex].trim();
const dbVal = parser.get_db_value_expression(schema, tokenKeys[tokenIndex], tokenRelationValue[tokenIndex]);
Eif (_.isPlainObject(dbVal) && dbVal.query_segment) {
tokenRelationValue[tokenIndex] = dbVal.query_segment;
queryParams.push(dbVal.parameter);
} else {
tokenRelationValue[tokenIndex] = dbVal;
}
}
queryRelations.push(util.format(
whereTemplate,
tokenKeys.join('","'), operator, tokenRelationValue.toString(),
));
} else {
buildQueryRelations(fieldName, tokenRelationValue);
}
};
if (relationKey === '$token') {
whereTemplate = 'token("%s") %s token(%s)';
const tokenRelationKeys = Object.keys(relationValue);
for (let tokenRK = 0; tokenRK < tokenRelationKeys.length; tokenRK++) {
const tokenRelationKey = tokenRelationKeys[tokenRK];
const tokenRelationValue = relationValue[tokenRelationKey];
buildTokenQueryRelations(tokenRelationKey, tokenRelationValue);
}
} else if (relationKey === '$contains') {
const fieldType1 = schemer.get_field_type(schema, fieldName);
Eif (['map', 'list', 'set', 'frozen'].includes(fieldType1)) {
if (fieldType1 === 'map' && _.isPlainObject(relationValue)) {
Object.keys(relationValue).forEach((key) => {
queryRelations.push(util.format(
'"%s"[%s] %s %s',
fieldName, '?', '=', '?',
));
queryParams.push(key);
queryParams.push(relationValue[key]);
});
} else {
queryRelations.push(util.format(
whereTemplate,
fieldName, operator, '?',
));
queryParams.push(relationValue);
}
} else {
throw (buildError('model.find.invalidcontainsop'));
}
} else if (relationKey === '$contains_key') {
const fieldType2 = schemer.get_field_type(schema, fieldName);
Iif (fieldType2 !== 'map') {
throw (buildError('model.find.invalidcontainskeyop'));
}
queryRelations.push(util.format(
whereTemplate,
fieldName, operator, '?',
));
queryParams.push(relationValue);
} else {
buildQueryRelations(fieldName, relationValue);
}
return { queryRelations, queryParams };
};
parser._parse_query_object = function f(schema, queryObject) {
let queryRelations = [];
let queryParams = [];
Object.keys(queryObject).forEach((fieldName) => {
if (fieldName.startsWith('$')) {
// search queries based on lucene index or solr
// escape all single quotes for queries in cassandra
Iif (fieldName === '$expr') {
if (typeof queryObject[fieldName].index === 'string' && typeof queryObject[fieldName].query === 'string') {
queryRelations.push(util.format(
"expr(%s,'%s')",
queryObject[fieldName].index, queryObject[fieldName].query.replace(/'/g, "''"),
));
} else {
throw (buildError('model.find.invalidexpr'));
}
} else Iif (fieldName === '$solr_query') {
if (typeof queryObject[fieldName] === 'string') {
queryRelations.push(util.format(
"solr_query='%s'",
queryObject[fieldName].replace(/'/g, "''"),
));
} else {
throw (buildError('model.find.invalidsolrquery'));
}
}
return;
}
let whereObject = queryObject[fieldName];
// Array of operators
Eif (!_.isArray(whereObject)) whereObject = [whereObject];
for (let fk = 0; fk < whereObject.length; fk++) {
let fieldRelation = whereObject[fk];
const cqlOperators = {
$eq: '=',
$ne: '!=',
$isnt: 'IS NOT',
$gt: '>',
$lt: '<',
$gte: '>=',
$lte: '<=',
$in: 'IN',
$like: 'LIKE',
$token: 'token',
$contains: 'CONTAINS',
$contains_key: 'CONTAINS KEY',
};
if (_.isPlainObject(fieldRelation)) {
const validKeys = Object.keys(cqlOperators);
const fieldRelationKeys = Object.keys(fieldRelation);
for (let i = 0; i < fieldRelationKeys.length; i++) {
if (!validKeys.includes(fieldRelationKeys[i])) {
// field relation key invalid, apply default $eq operator
fieldRelation = { $eq: fieldRelation };
break;
}
}
} else {
fieldRelation = { $eq: fieldRelation };
}
const relationKeys = Object.keys(fieldRelation);
for (let rk = 0; rk < relationKeys.length; rk++) {
const relationKey = relationKeys[rk];
const relationValue = fieldRelation[relationKey];
const extractedRelations = parser.extract_query_relations(
fieldName,
relationKey,
relationValue,
schema,
cqlOperators,
);
queryRelations = queryRelations.concat(extractedRelations.queryRelations);
queryParams = queryParams.concat(extractedRelations.queryParams);
}
}
});
return { queryRelations, queryParams };
};
parser.get_filter_clause = function f(schema, queryObject, clause) {
const parsedObject = parser._parse_query_object(schema, queryObject);
const filterClause = {};
if (parsedObject.queryRelations.length > 0) {
filterClause.query = util.format('%s %s', clause, parsedObject.queryRelations.join(' AND '));
} else {
filterClause.query = '';
}
filterClause.params = parsedObject.queryParams;
return filterClause;
};
parser.get_filter_clause_ddl = function f(schema, queryObject, clause) {
const filterClause = parser.get_filter_clause(schema, queryObject, clause);
let filterQuery = filterClause.query;
filterClause.params.forEach((param) => {
let queryParam;
Iif (typeof param === 'string') {
queryParam = util.format("'%s'", param);
} else Iif (param instanceof Date) {
queryParam = util.format("'%s'", param.toISOString());
} else Iif (param instanceof cql.types.Long
|| param instanceof cql.types.Integer
|| param instanceof cql.types.BigDecimal
|| param instanceof cql.types.TimeUuid
|| param instanceof cql.types.Uuid) {
queryParam = param.toString();
} else Iif (param instanceof cql.types.LocalDate
|| param instanceof cql.types.LocalTime
|| param instanceof cql.types.InetAddress) {
queryParam = util.format("'%s'", param.toString());
} else {
queryParam = param;
}
// TODO: unhandled if queryParam is a string containing ? character
// though this is unlikely to have in materialized view filters, but...
filterQuery = filterQuery.replace('?', queryParam);
});
return filterQuery;
};
parser.get_where_clause = function f(schema, queryObject) {
return parser.get_filter_clause(schema, queryObject, 'WHERE');
};
parser.get_if_clause = function f(schema, queryObject) {
return parser.get_filter_clause(schema, queryObject, 'IF');
};
parser.get_primary_key_clauses = function f(schema) {
const partitionKey = schema.key[0];
let clusteringKey = schema.key.slice(1, schema.key.length);
const clusteringOrder = [];
for (let field = 0; field < clusteringKey.length; field++) {
if (schema.clustering_order
&& schema.clustering_order[clusteringKey[field]]
&& schema.clustering_order[clusteringKey[field]].toLowerCase() === 'desc') {
clusteringOrder.push(util.format('"%s" DESC', clusteringKey[field]));
} else {
clusteringOrder.push(util.format('"%s" ASC', clusteringKey[field]));
}
}
let clusteringOrderClause = '';
Eif (clusteringOrder.length > 0) {
clusteringOrderClause = util.format(' WITH CLUSTERING ORDER BY (%s)', clusteringOrder.toString());
}
let partitionKeyClause = '';
Eif (_.isArray(partitionKey)) {
partitionKeyClause = partitionKey.map((v) => util.format('"%s"', v)).join(',');
} else {
partitionKeyClause = util.format('"%s"', partitionKey);
}
let clusteringKeyClause = '';
Eif (clusteringKey.length) {
clusteringKey = clusteringKey.map((v) => util.format('"%s"', v)).join(',');
clusteringKeyClause = util.format(',%s', clusteringKey);
}
return { partitionKeyClause, clusteringKeyClause, clusteringOrderClause };
};
parser.get_mview_where_clause = function f(schema, viewSchema) {
const clauses = parser.get_primary_key_clauses(viewSchema);
let whereClause = clauses.partitionKeyClause.split(',').join(' IS NOT NULL AND ');
Eif (clauses.clusteringKeyClause) whereClause += clauses.clusteringKeyClause.split(',').join(' IS NOT NULL AND ');
whereClause += ' IS NOT NULL';
const filters = _.cloneDeep(viewSchema.filters);
if (_.isPlainObject(filters)) {
// delete primary key fields defined as isn't null in filters
Object.keys(filters).forEach((filterKey) => {
if (filters[filterKey].$isnt === null
&& (viewSchema.key.includes(filterKey) || viewSchema.key[0].includes(filterKey))) {
delete filters[filterKey].$isnt;
}
});
const filterClause = parser.get_filter_clause_ddl(schema, filters, 'AND');
whereClause += util.format(' %s', filterClause).replace(/IS NOT null/g, 'IS NOT NULL');
}
// remove unnecessarily quoted field names in generated where clause
// so that it matches the where_clause from database schema
const quotedFieldNames = whereClause.match(/"(.*?)"/g);
quotedFieldNames.forEach((fieldName) => {
const unquotedFieldName = fieldName.replace(/"/g, '');
const reservedKeywords = [
'ADD', 'AGGREGATE', 'ALLOW', 'ALTER', 'AND', 'ANY', 'APPLY',
'ASC', 'AUTHORIZE', 'BATCH', 'BEGIN', 'BY', 'COLUMNFAMILY',
'CREATE', 'DELETE', 'DESC', 'DROP', 'EACH_QUORUM', 'ENTRIES',
'FROM', 'FULL', 'GRANT', 'IF', 'IN', 'INDEX', 'INET', 'INFINITY',
'INSERT', 'INTO', 'KEYSPACE', 'KEYSPACES', 'LIMIT', 'LOCAL_ONE',
'LOCAL_QUORUM', 'MATERIALIZED', 'MODIFY', 'NAN', 'NORECURSIVE',
'NOT', 'OF', 'ON', 'ONE', 'ORDER', 'PARTITION', 'PASSWORD', 'PER',
'PRIMARY', 'QUORUM', 'RENAME', 'REVOKE', 'SCHEMA', 'SELECT', 'SET',
'TABLE', 'TIME', 'THREE', 'TO', 'TOKEN', 'TRUNCATE', 'TWO', 'UNLOGGED',
'UPDATE', 'USE', 'USING', 'VIEW', 'WHERE', 'WITH'];
if (unquotedFieldName === unquotedFieldName.toLowerCase()
&& !reservedKeywords.includes(unquotedFieldName.toUpperCase())) {
whereClause = whereClause.replace(fieldName, unquotedFieldName);
}
});
return whereClause.trim();
};
parser.get_orderby_clause = function f(queryObject) {
const orderKeys = [];
Object.keys(queryObject).forEach((k) => {
const queryItem = queryObject[k];
if (k.toLowerCase() === '$orderby') {
Iif (!(queryItem instanceof Object)) {
throw (buildError('model.find.invalidorder'));
}
const orderItemKeys = Object.keys(queryItem);
for (let i = 0; i < orderItemKeys.length; i++) {
const cqlOrderDirection = { $asc: 'ASC', $desc: 'DESC' };
Eif (orderItemKeys[i].toLowerCase() in cqlOrderDirection) {
let orderFields = queryItem[orderItemKeys[i]];
Eif (!_.isArray(orderFields)) {
orderFields = [orderFields];
}
for (let j = 0; j < orderFields.length; j++) {
orderKeys.push(util.format(
'"%s" %s',
orderFields[j], cqlOrderDirection[orderItemKeys[i]],
));
}
} else {
throw (buildError('model.find.invalidordertype', orderItemKeys[i]));
}
}
}
});
return orderKeys.length ? util.format('ORDER BY %s', orderKeys.join(', ')) : '';
};
parser.get_groupby_clause = function f(queryObject) {
let groupbyKeys = [];
Object.keys(queryObject).forEach((k) => {
const queryItem = queryObject[k];
if (k.toLowerCase() === '$groupby') {
Iif (!(queryItem instanceof Array)) {
throw (buildError('model.find.invalidgroup'));
}
groupbyKeys = groupbyKeys.concat(queryItem);
}
});
groupbyKeys = groupbyKeys.map((key) => `"${key}"`);
return groupbyKeys.length ? util.format('GROUP BY %s', groupbyKeys.join(', ')) : '';
};
parser.get_limit_clause = function f(queryObject) {
let limitClause = '';
Object.keys(queryObject).forEach((k) => {
const queryItem = queryObject[k];
if (k.toLowerCase() === '$limit' || k.toLowerCase() === '$per_partition_limit') {
Iif (typeof queryItem !== 'number') throw (buildError('model.find.limittype'));
limitClause = util.format('LIMIT %s', queryItem);
}
if (k.toLowerCase() === '$per_partition_limit') {
limitClause = util.format('PER PARTITION %s', limitClause);
}
});
return limitClause;
};
parser.get_select_clause = function f(options) {
let selectClause = '*';
if (options.select && _.isArray(options.select) && options.select.length > 0) {
const selectArray = [];
for (let i = 0; i < options.select.length; i++) {
// separate the aggregate function and the column name if select is an aggregate function
const selection = options.select[i].split(/[(, )]/g).filter((e) => (e));
if (selection.length === 1) {
Iif (selection[0] === '*') selectArray.push('*');
else selectArray.push(util.format('"%s"', selection[0]));
} else if (selection.length === 2) {
selectArray.push(util.format('%s("%s")', selection[0], selection[1]));
} else if (selection.length >= 3 && selection[selection.length - 2].toLowerCase() === 'as') {
const selectionEndChunk = selection.splice(selection.length - 2);
let selectionChunk = '';
if (selection.length === 1) {
selectionChunk = util.format('"%s"', selection[0]);
} else if (selection.length === 2) {
selectionChunk = util.format('%s("%s")', selection[0], selection[1]);
} else {
selectionChunk = util.format('%s(%s)', selection[0], `"${selection.splice(1).join('","')}"`);
}
selectArray.push(util.format('%s AS "%s"', selectionChunk, selectionEndChunk[1]));
} else Eif (selection.length >= 3) {
selectArray.push(util.format('%s(%s)', selection[0], `"${selection.splice(1).join('","')}"`));
}
}
selectClause = selectArray.join(',');
}
return selectClause.trim();
};
module.exports = parser;
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