www.gittip.com/www/%participant_id/tip.json

"""Get or change the authenticated user's tip to this person.
"""
from decimal import InvalidOperation

from aspen import Response

# ========================================================================== ^L

out = {}
if not user.ANON:

    # Get tipper and tippee.
    # ======================
    # XXX We could/should enforce that tips cannot be pledged at all to locked
    # accounts.

    tipper = user.id
    tippee = path['participant_id']


    # Get and maybe set amount.
    # =========================

    if tippee == tipper:
        amount = None
    elif POST and 'amount' in body:
        try:
            amount = user.set_tip_to(tippee, body['amount'])
        except (InvalidOperation, ValueError):
            raise Response(400, "bad amount")
    else:
        amount = user.get_tip_to(tippee)

    total_giving = user.get_dollars_giving()

    out = {"amount": str(amount), "total_giving": str(total_giving)}


response.body = out