aboutsummaryrefslogtreecommitdiff
path: root/content_scripts/notify.ts
blob: d300dbc0305f674602ae1d7227c0788800bc577e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 This file is part of TALER
 (C) 2015 GNUnet e.V.

 TALER is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 TALER is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
 */

/// <reference path="../lib/decl/chrome/chrome.d.ts" />

"use strict";


/**
 * Script that is injected into (all!) pages to allow them
 * to interact with the GNU Taler wallet via DOM Events.
 */

// Make sure we don't pollute the namespace too much.
namespace TalerNotify {
  const PROTOCOL_VERSION = 1;

  console.log("Taler injected");

  function subst(url: string, H_contract) {
    url = url.replace("${H_contract}", H_contract);
    url = url.replace("${$}", "$");
    return url;
  }

  let $ = (x) => document.getElementById(x);

  document.addEventListener("taler-probe", function(e) {
    let evt = new CustomEvent("taler-wallet-present", {
      detail: {
        walletProtocolVersion: PROTOCOL_VERSION
      }
    });
    document.dispatchEvent(evt);
    console.log("handshake done");
  });

  document.addEventListener("taler-create-reserve", function(e: CustomEvent) {
    console.log("taler-create-reserve with " + JSON.stringify(e.detail));
    let params = {
      amount: JSON.stringify(e.detail.amount),
      callback_url: URI(e.detail.callback_url).absoluteTo(document.location.href),
      bank_url: document.location.href,
      suggested_mint: e.detail.suggested_mint,
    };
    let uri = URI(chrome.extension.getURL("pages/confirm-create-reserve.html"));
    document.location.href = uri.query(params).href();
  });

  document.addEventListener("taler-confirm-reserve", function(e: CustomEvent) {
    console.log("taler-confirm-reserve with " + JSON.stringify(e.detail));
    let msg = {
      type: "confirm-reserve",
      detail: {
        reservePub: e.detail.reserve_pub
      }
    };
    chrome.runtime.sendMessage(msg, (resp) => {
      console.log("confirm reserve done");
    });
  });


  document.addEventListener("taler-contract", function(e: CustomEvent) {
    // XXX: the merchant should just give us the parsed data ...
    let offer = JSON.parse(e.detail);

    if (!offer.contract) {
      console.error("contract field missing");
      return;
    }

    let msg = {
      type: "check-repurchase",
      detail: {
        contract: offer.contract
      },
    };

    chrome.runtime.sendMessage(msg, (resp) => {
      if (resp.error) {
        console.error("wallet backend error", resp);
        return;
      }
      if (resp.isRepurchase) {
        console.log("doing repurchase");
        console.assert(resp.existingFulfillmentUrl);
        console.assert(resp.existingContractHash);
        window.location.href = subst(resp.existingFulfillmentUrl,
                                     resp.existingContractHash);

      } else {
        let uri = URI(chrome.extension.getURL("pages/confirm-contract.html"));
        let params = {
          offer: JSON.stringify(offer),
          merchantPageUrl: document.location.href,
        };
        document.location.href = uri.query(params).href();
      }
    });
  });


  document.addEventListener('taler-execute-payment', function(e: CustomEvent) {
    console.log("got taler-execute-payment in content page");
    if (!e.detail.pay_url) {
      console.log("field 'pay_url' missing in taler-execute-payment event");
      return;
    }
    let payUrl = e.detail.pay_url;
    let msg = {
      type: "execute-payment",
      detail: {
        H_contract: e.detail.H_contract,
      },
    };
    chrome.runtime.sendMessage(msg, (resp) => {
      console.log("got resp");
      console.dir(resp);
      if (!resp.success) {
        console.log("got event detial:");
        console.dir(e.detail);
        if (e.detail.offering_url) {
          console.log("offering url", e.detail.offering_url);
          window.location.href = e.detail.offering_url;
        } else {
          console.error("execute-payment failed");
        }
        return;
      }
      let contract = resp.contract;
      if (!contract) {
        throw Error("contract missing");
      }

      console.log("Making request to ", payUrl);
      let r = new XMLHttpRequest();
      r.open('post', payUrl);
      r.send(JSON.stringify(resp.payReq));
      r.onload = () => {
        switch (r.status) {
          case 200:
            console.log("going to", contract.fulfillment_url);
            // TODO: Is this the right thing?  Does the reload
            // TODO: override setting location.href?
            window.location.href = subst(contract.fulfillment_url,
                                         e.detail.H_contract);
            window.location.reload(true);
            break;
          default:
            console.log("Unexpected status code for $pay_url:", r.status);
            break;
        }
      };
    });
  });
}