/// <reference types="node"/>
/// <reference types="vinyl"/>

declare module "gulp-insert" {
    import File = require("vinyl");

    interface Transformer {
        (contents: string, file: File): string;
    }

    namespace Insert {
        /**
         * Prepends a string onto the contents
         * @param {string} content
         * @returns {NodeJS.ReadWriteStream}
         */
        function prepend(content: string): NodeJS.ReadWriteStream;

        /**
         * Appends a string onto the contents
         * @param {string} content
         * @returns {NodeJS.ReadWriteStream}
         */
        function append(content: string): NodeJS.ReadWriteStream;

        /**
         * Wraps the contents with two strings
         * @param {string} prepend
         * @param {string} append
         * @returns {NodeJS.ReadWriteStream}
         */
        function wrap(prepend: string, append: string): NodeJS.ReadWriteStream;

        /**
         * Calls a function with the contents of the file
         * @param {Transformer} transformer
         * @returns {NodeJS.ReadWriteStream}
         */
        function transform(transformer: Transformer): NodeJS.ReadWriteStream;
    }

    namespace Insert {}
    export = Insert;
}