From a6a6865e95248dc47e640764a0cb428442519b21 Mon Sep 17 00:00:00 2001
From: tecnovert <tecnovert@tecnovert.net>
Date: Tue, 11 Oct 2022 22:09:20 +0200
Subject: [PATCH] ui: Add repeat offer feature.

Does not transfer the fee values yet.
---
 basicswap/http_server.py       | 13 +++---
 basicswap/templates/offer.html | 13 +++++-
 basicswap/ui/page_offers.py    | 74 +++++++++++++++++++++++++++++++---
 3 files changed, 88 insertions(+), 12 deletions(-)

diff --git a/basicswap/http_server.py b/basicswap/http_server.py
index 6ffb25d..f56b1dc 100644
--- a/basicswap/http_server.py
+++ b/basicswap/http_server.py
@@ -9,7 +9,7 @@ import json
 import traceback
 import threading
 import http.client
-import urllib.parse
+from urllib import parse
 from http.server import BaseHTTPRequestHandler, HTTPServer
 from jinja2 import Environment, PackageLoader
 
@@ -90,10 +90,13 @@ def listExplorerActions(swap_client):
 
 class HttpHandler(BaseHTTPRequestHandler):
 
+    def generate_form_id(self):
+        return os.urandom(8).hex()
+
     def checkForm(self, post_string, name, messages):
         if post_string == '':
             return None
-        form_data = urllib.parse.parse_qs(post_string)
+        form_data = parse.parse_qs(post_string)
         form_id = form_data[b'formid'][0].decode('utf-8')
         if self.server.last_form_id.get(name, None) == form_id:
             messages.append('Prevented double submit for form {}.'.format(form_id))
@@ -118,10 +121,11 @@ class HttpHandler(BaseHTTPRequestHandler):
                 if swap_client.debug:
                     swap_client.log.error(traceback.format_exc())
 
+        self.putHeaders(200, 'text/html')
         return bytes(template.render(
             title=self.server.title,
             h2=self.server.title,
-            form_id=os.urandom(8).hex(),
+            form_id=self.generate_form_id(),
             **args_dict,
         ), 'UTF-8')
 
@@ -535,7 +539,7 @@ class HttpHandler(BaseHTTPRequestHandler):
         self.end_headers()
 
     def handle_http(self, status_code, path, post_string='', is_json=False):
-        parsed = urllib.parse.urlparse(self.path)
+        parsed = parse.urlparse(self.path)
         url_split = parsed.path.split('/')
         if post_string == '' and len(parsed.query) > 0:
             post_string = parsed.query
@@ -595,7 +599,6 @@ class HttpHandler(BaseHTTPRequestHandler):
                 return self.page_error(str(ex))
 
         try:
-            self.putHeaders(status_code, 'text/html')
             if len(url_split) > 1:
                 page = url_split[1]
                 if page == 'active':
diff --git a/basicswap/templates/offer.html b/basicswap/templates/offer.html
index 0ad76ab..473817c 100644
--- a/basicswap/templates/offer.html
+++ b/basicswap/templates/offer.html
@@ -379,13 +379,22 @@ None
     <span>New Bid</span> </button>
 </div>
 
-{% if data.sent == 'True' and data.was_revoked != true %}
+
+{% if data.sent == 'True' %}
+
+<div class="w-full md:w-auto p-1.5 ml-2">
+  <button name="repeat_offer"  value="Repeat Offer" type="submit" class="flex flex-wrap justify-center w-full px-4 py-2.5 font-medium text-sm text-coolGray-500 hover:text-coolGray-600 border border-coolGray-200 hover:border-coolGray-300 bg-white rounded-md shadow-button focus:ring-0 focus:outline-none">
+    <span>Repeat Offer</span> </button>
+</div>
+
+{% if data.was_revoked != true %}
 
 <div class="w-full md:w-auto p-1.5 ml-2">
   <button name="revoke_offer"  value="Revoke Offer" type="submit" onclick="return confirmPopup();" class="flex flex-wrap justify-center w-full px-4 py-2.5 font-medium text-sm text-coolGray-500 hover:text-coolGray-600 border border-coolGray-200 hover:border-coolGray-300 bg-white rounded-md shadow-button focus:ring-0 focus:outline-none">
-    <span>Revoke order</span> </button>
+    <span>Revoke Offer</span> </button>
 </div>
 
+{% endif %}
 {% endif %}
 
 <!-- todo
diff --git a/basicswap/ui/page_offers.py b/basicswap/ui/page_offers.py
index 5b794e1..3b5e074 100644
--- a/basicswap/ui/page_offers.py
+++ b/basicswap/ui/page_offers.py
@@ -6,6 +6,7 @@
 
 import traceback
 
+from urllib import parse
 from .util import (
     PAGE_LIMIT,
     getCoinType,
@@ -44,6 +45,15 @@ def value_or_none(v):
     return v
 
 
+def decode_offer_id(v):
+    try:
+        offer_id = bytes.fromhex(v)
+        ensure(len(offer_id) == 28, 'Bad offer ID')
+        return offer_id
+    except Exception:
+        raise ValueError('Bad offer ID')
+
+
 def parseOfferFormData(swap_client, form_data, page_data, options={}):
     errors = []
     parsed_data = {}
@@ -264,6 +274,51 @@ def postNewOffer(swap_client, form_data):
     return postNewOfferFromParsed(swap_client, parsed_data)
 
 
+def offer_to_post_string(self, swap_client, offer_id):
+
+    offer, xmr_offer = swap_client.getXmrOffer(offer_id)
+    ensure(offer, 'Unknown offer ID')
+
+    ci_from = swap_client.ci(offer.coin_from)
+    ci_to = swap_client.ci(offer.coin_to)
+    offer_data = {
+        'formid': self.generate_form_id(),
+        'addr_to': offer.addr_to,
+        'addr_from': offer.addr_from,
+        'coin_from': offer.coin_from,
+        'coin_to': offer.coin_to,
+        # TODO store fee conf, or pass directly
+        # 'fee_from_conf'
+        # 'fee_to_conf'
+        'amt_from': ci_from.format_amount(offer.amount_from),
+        'amt_bid_min': ci_from.format_amount(offer.min_bid_amount),
+        'rate': ci_to.format_amount(offer.rate),
+        'amt_to': ci_to.format_amount((offer.amount_from * offer.rate) // ci_from.COIN()),
+        'validhrs': offer.time_valid // (60 * 60),
+    }
+
+    swap_client.log.error('[rm] offer.amount_negotiable {}'.format(offer.amount_negotiable))
+    swap_client.log.error('[rm] offer.rate_negotiable {}'.format(offer.rate_negotiable))
+    if offer.amount_negotiable:
+        offer_data['amt_var'] = True
+    if offer.rate_negotiable:
+        offer_data['rate_var'] = True
+
+    if offer.lock_type == TxLockTypes.SEQUENCE_LOCK_TIME or offer.lock_type == TxLockTypes.ABS_LOCK_TIME:
+        if offer.lock_value > 60 * 60:
+            offer_data['lockhrs'] = offer.lock_value // (60 * 60)
+        else:
+            offer_data['lockhrs'] = offer.lock_value // 60
+    try:
+        strategy = swap_client.getLinkedStrategy(Concepts.OFFER, offer.offer_id)
+        swap_client.log.error('[rm] strategy {}'.format(strategy))
+        offer_data['automation_strat_id'] = strategy[0]
+    except Exception:
+        pass  # None found
+
+    return parse.urlencode(offer_data).encode()
+
+
 def page_newoffer(self, url_split, post_string):
     server = self.server
     swap_client = server.swap_client
@@ -283,6 +338,13 @@ def page_newoffer(self, url_split, post_string):
         'automation_strat_id': -1,
         'amt_bid_min': format_amount(1000, 8),
     }
+
+    post_data = parse.parse_qs(post_string)
+    if 'offer_from' in post_data:
+        offer_from_id_hex = post_data['offer_from'][0]
+        offer_from_id = decode_offer_id(offer_from_id_hex)
+        post_string = offer_to_post_string(self, swap_client, offer_from_id)
+
     form_data = self.checkForm(post_string, 'newoffer', err_messages)
 
     if form_data:
@@ -337,11 +399,7 @@ def page_newoffer(self, url_split, post_string):
 
 def page_offer(self, url_split, post_string):
     ensure(len(url_split) > 2, 'Offer ID not specified')
-    try:
-        offer_id = bytes.fromhex(url_split[2])
-        ensure(len(offer_id) == 28, 'Bad offer ID')
-    except Exception:
-        raise ValueError('Bad offer ID')
+    offer_id = decode_offer_id(url_split[2])
     server = self.server
     swap_client = server.swap_client
     summary = swap_client.getSummary()
@@ -373,6 +431,12 @@ def page_offer(self, url_split, post_string):
                 messages.append('Offer revoked')
             except Exception as ex:
                 messages.append('Revoke offer failed: ' + str(ex))
+        elif b'repeat_offer' in form_data:
+            # Can't set the post data here as browsers will always resend the original post data when responding to redirects
+            self.send_response(302)
+            self.send_header('Location', '/newoffer?offer_from=' + offer_id.hex())
+            self.end_headers()
+            return bytes()
         elif b'newbid' in form_data:
             show_bid_form = True
         elif b'sendbid' in form_data: