repurchase detection

1 files changed, 33 insertions, 5 deletions

diff --git a/extension/content_scripts/notify.ts b/extension/content_scripts/notify.ts
index 9a64bcf0c..d300dbc03 100644
--- a/extension/content_scripts/notify.ts
+++ b/extension/content_scripts/notify.ts
@@ -77,12 +77,40 @@ namespace TalerNotify {
   document.addEventListener("taler-contract", function(e: CustomEvent) {
     // XXX: the merchant should just give us the parsed data ...
     let offer = JSON.parse(e.detail);
-    let uri = URI(chrome.extension.getURL("pages/confirm-contract.html"));
-    let params = {
-      offer: JSON.stringify(offer),
-      merchantPageUrl: document.location.href,
+
+    if (!offer.contract) {
+      console.error("contract field missing");
+      return;
+    }
+
+    let msg = {
+      type: "check-repurchase",
+      detail: {
+        contract: offer.contract
+      },
     };
-    document.location.href = uri.query(params).href();
+
+    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();
+      }
+    });
   });