DefinitelyTyped/types/esquery/index.d.ts

// Type definitions for esquery 1.0
// Project: https://github.com/jrfeenst/esquery
// Definitions by: cherryblossom000 <https://github.com/cherryblossom000>
//                 Brad Zacher <https://github.com/bradzacher>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

import { Node } from 'estree';

export as namespace esquery;

export = query;

/** Query the code AST using the selector string. */
declare function query(ast: Node, selector: string): Node[];

declare namespace query {
    /** Parse a selector and return its AST. */
    function parse(selector: string): Selector;
    /** From a JS AST and a selector AST, collect all JS AST nodes that match the selector. */
    function match(ast: Node, selector: Selector): Node[];
    /** Given a `node` and its ancestors, determine if `node` is matched by `selector`. */
    function matches(node: Node, selector: Selector, ancestry: Node[]): boolean;
    /** Query the code AST using the selector string. */
    function query(ast: Node, selector: string): Node[];

    //
    // Unions
    //
    type Selector =  Field
        | Type
        | Sequence
        | Identifier
        | Wildcard
        | Attribute
        | NthChild
        | NthLastChild
        | Descendant
        | Child
        | Sibling
        | Adjacent
        | Negation
        | Matches
        | Has
        | Class;
    type MultiSelector = Sequence
        | Negation
        | Matches
        | Has;
    type BinarySelector = Descendant
        | Child
        | Sibling
        | Adjacent;
    type NthSelector = NthChild
        | NthLastChild;
    type SubjectSelector = NthSelector
        | BinarySelector
        | MultiSelector
        | Identifier
        | Wildcard
        | Attribute;
    type Literal = StringLiteral
        | NumericLiteral;

    //
    // Base Atoms
    //
    interface Atom {
        type: string;
    }
    interface SubjectSelectorAtom extends Atom {
        subject?: boolean;
    }
    interface NthSelectorAtom extends SubjectSelectorAtom {
        index: NumericLiteral;
    }
    interface BinarySelectorAtom extends SubjectSelectorAtom {
        type: 'child' | 'sibling' | 'adjacent' | 'descendant';
        left: SubjectSelector;
        right: SubjectSelector;
    }
    interface MultiSelectorAtom extends SubjectSelectorAtom {
        selectors: SubjectSelector[];
    }
    interface LiteralAtom extends Atom {
        type: 'literal';
        value: string | number;
    }

    //
    // Literals
    //
    interface StringLiteral extends LiteralAtom {
        value: string;
    }
    interface NumericLiteral extends LiteralAtom {
        value: number;
    }
    interface RegExpLiteral extends Atom {
        type: 'regexp';
        value: RegExp;
    }

    //
    // Atoms
    //
    interface Field extends Atom {
        type: 'field';
        name: string;
    }
    interface Type extends Atom {
        type: 'type';
        value: string;
    }
    interface Sequence extends MultiSelectorAtom {
        type: 'compound';
    }
    interface Identifier extends SubjectSelectorAtom {
        type: 'identifier';
        value: string;
    }
    interface Wildcard extends SubjectSelectorAtom {
        type: 'wildcard';
        value: '*';
    }
    interface Attribute extends SubjectSelectorAtom {
        type: 'attribute';
        name: string;
        operator?: '=' | '!=' | '>' | '<' | '>=' | '<=';
        value?: Literal | RegExpLiteral | Type;
    }
    interface NthChild extends NthSelectorAtom {
        type: 'nth-child';
    }
    interface NthLastChild extends NthSelectorAtom {
        type: 'nth-last-child';
    }
    interface Descendant extends BinarySelectorAtom {
        type: 'descendant';
    }
    interface Child extends BinarySelectorAtom {
        type: 'child';
    }
    interface Sibling extends BinarySelectorAtom {
        type: 'sibling';
    }
    interface Adjacent extends BinarySelectorAtom {
        type: 'adjacent';
    }
    interface Negation extends MultiSelectorAtom {
        type: 'not';
    }
    interface Matches extends MultiSelectorAtom {
        type: 'matches';
    }
    interface Has extends MultiSelectorAtom {
        type: 'has';
    }
    interface Class extends Atom {
        type: 'class';
        name: 'declaration' | 'expression' | 'function' | 'pattern' | 'statement';
    }
}