chego-tools

This package contains a bunch of functions used across Chego components.

Install

npm install --save @chego/chego-tools

Short introduction

The functions included in this package have been separated from the core component, so that they can be used in database drivers without any unnecessary and heavy dependencies. As such, they should not be part of the official API.

To find out what Property, Table, SortingData, Alias, RowId, Limit, LogicalOperatorScope, FunctionData are, please check Chego API

Tools

newProperty({ table?: Table, name?: string, alias?: string, type?: QuerySyntaxEnum }): Property

Returns new Property object.

newTable(name: string, alias?: string): Table

Returns new Table object.

newLimit(offsetOrCount: number, count?: number): Limit

Returns new Limit object.

newSortingData(property: Property = null, order: SortingOrderEnum = SortingOrderEnum.ASC): SortingData

Returns new SortingData object.

rowId(alias: string = 'id'): Property

Returns new Property object with the defined type QuerySyntaxEnum.RowId.

alias(name: string, alias: string): Property

Returns new Property object with the defined type QuerySyntaxEnum.Alias.

getLabel(obj: Property | Table):string

Returns label string of given property/table. If alias is set then it will return its value, otherwise it returns name of the property.

parseStringToPropertyIfRequired(key: StringOrProperty):Property

Function checks if a given key is a string, if so, it parses it to a Property object.

mergePropertiesWithLogicalAnd(properties: PropertyOrLogicalOperatorScope[], current: PropertyOrLogicalOperatorScope, i: number): PropertyOrLogicalOperatorScope[]

Array.reduce callback, which checks each element and wraps it within the logical operator scope.

pseudocode

select['foo','bar','baz', or('qux')] ---> select['foo',and('bar'),and('baz'), or('qux')] 

newLogicalOperatorScope(type: QuerySyntaxEnum, properties?: PropertyOrLogicalOperatorScope[]): LogicalOperatorScope

Returns new LogicalOperatorScope object.

isLogicalOperator(value: QuerySyntaxEnum): boolean

Checks if a given enum value is equal to And, Or or Not.

isLogicalOperatorScope(data: any): data is LogicalOperatorScope

Checks if a given prop is a LogicalOperatorScope object.

isFunction(value: any): boolean

Checks if a given prop is a function.

clone(obj: any):any

Performs a deep cloning of an object.

isQuerySchemeElement(obj: any): boolean

Checks if a given prop is a QuerySchemeElement object.

combineReducers(...reducers: Fn[]) => (previous: any, current: any, index: number, org: any[])

Executes Array.reduce callbacks - one by one - in a single iteration.

parseStringToTable(name: string, alias?: string): Table

Converts given string to Table object.

parseStringToProperty(name: string, table?: Table): Property

Converts given string to Property object.

isTableDotKeyString(value: any): boolean

Checks if a given param is a string and matches pattern eg. superheros.name.

isAliasString(value: any): boolean

Checks if a given param is a string and matches pattern eg. writers.name AS author.

isProperty = (value: any): value is Property

Checks if a given param is a Property object.

isRowId = (value: any): boolean

Checks if a given param is a Property object with defined type QuerySyntaxEnum.RowId.

isAlias = (value: any): boolean

Checks if a given param is a Property object with defined type QuerySyntaxEnum.Alias.

isMySQLFunction = (value: any): value is FunctionData

Checks if a given param is a FunctionData object.

isItemWithCustomId = (value: any): value is ItemWithCustomId

Checks if a given param is a ItemWithCustomId object.

Contribute

There is still a lot to do, so if you want to be part of the Chego project and make it better, it's great. Whether you find a bug or have a feature request, please contact us. With your help, we'll make it a great tool.

How to contribute

Follow our kanban boards to be up to date

Kanban boards

Join the team, feel free to catch any task or suggest a new one.

License

Copyright (c) 2019 Chego Team

Licensed under the MIT license.