descriptiveCounter.ts

function counterDecode(inputId: string, outputId: string) {
    var custom_indent: string = (<HTMLInputElement>document.getElementById(inputId)).value;
    var result: string = descriptiveCounter(custom_indent);
    document.getElementById(outputId).innerHTML = result;
}

export function descriptiveCounter(input: string): string {
    input = input.replace(/\\t/g, "	");
    input = input.replace(/\\r/g, "\r");
    input = input.replace(/\\n/g, "\n");

    var tokens: Array<string> = input.split("");
    var result = "";
    var repeatedCharCount = 0;
    for (var i = 0; i < tokens.length; i++) {
        var char = input.substr(i, 1);
        if (char == input.substr(i + 1, 1)) {
            repeatedCharCount++;
        } else {
            switch (char) {
                case " ":
                    char = "blankspace";
                    break;
                case "\t":
                    char = "tab";
                    break;
                case "\n":
                    char = "\\n";
                    break;
                case "\r":
                    char = "\\r";
                    break;
                default:
                    char = "'" + char + "'";
            }
            repeatedCharCount = repeatedCharCount > 8 ? 8 : repeatedCharCount;
            if (repeatedCharCount > 0) {
                char += "s";
            }
            result += getCountText(repeatedCharCount, char);
            repeatedCharCount = 0;
        }
    }

    if (result.length < 0) {
        switch (char) {
            case " ":
                char = "blankspace";
                break;
            case "\t":
                char = "tab";
        }
        repeatedCharCount = repeatedCharCount > 8 ? 8 : repeatedCharCount;
        result = getCountText(repeatedCharCount, char);
    }

    result = result.replace(/^ & /, "")
    return result;
}

function getCountText(count: number, char: string): string {
    const dict = ["one", "two", "three", "four", "five", "six", "seven", "eight", "many"];
    const ampersand = " & ";
    return ampersand + dict[count] + " " + char;
}