"""A set of common utilities used within the environments. These are
not intended as API functions, and will not remain stable over time.
"""

color2num = dict(
    gray=30,
    red=31,
    green=32,
    yellow=33,
    blue=34,
    magenta=35,
    cyan=36,
    white=37,
    crimson=38
)


def colorize(string, color, bold=False, highlight=False):
    """Return string surrounded by appropriate terminal color codes to
    print colorized text.  Valid colors: gray, red, green, yellow,
    blue, magenta, cyan, white, crimson
    """

    attr = []
    num = color2num[color]
    if highlight:
        num += 10
    attr.append(str(num))
    if bold:
        attr.append('1')
    attrs = ';'.join(attr)
    return '\x1b[%sm%s\x1b[0m' % (attrs, string)