From 1882176489a31f42f0a6d15be88e821521e43157 Mon Sep 17 00:00:00 2001
From: "B. Petersen" <r10s@b44t.com>
Date: Sun, 9 Feb 2020 01:44:17 +0100
Subject: [PATCH] let dc_check_qr() accept DCACCOUNT-schemes

---
 deltachat-ffi/deltachat.h |  3 ++-
 src/lot.rs                |  3 +++
 src/qr.rs                 | 50 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/deltachat-ffi/deltachat.h b/deltachat-ffi/deltachat.h
index bb883edaf..d7b1c426d 100644
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -2111,6 +2111,7 @@ void            dc_stop_ongoing_process      (dc_context_t* context);
 #define         DC_QR_FPR_OK                 210 // id=contact
 #define         DC_QR_FPR_MISMATCH           220 // id=contact
 #define         DC_QR_FPR_WITHOUT_ADDR       230 // test1=formatted fingerprint
+#define         DC_QR_ACCOUNT                250 // text1=domain
 #define         DC_QR_ADDR                   320 // id=contact
 #define         DC_QR_TEXT                   330 // text1=text
 #define         DC_QR_URL                    332 // text1=URL
@@ -2128,12 +2129,12 @@ void            dc_stop_ongoing_process      (dc_context_t* context);
  * - DC_QR_FPR_OK with dc_lot_t::id=Contact ID
  * - DC_QR_FPR_MISMATCH with dc_lot_t::id=Contact ID
  * - DC_QR_FPR_WITHOUT_ADDR with dc_lot_t::test1=Formatted fingerprint
+ * - DC_QR_ACCOUNT allows creation of an account, dc_lot_t::text1=domain
  * - DC_QR_ADDR with dc_lot_t::id=Contact ID
  * - DC_QR_TEXT with dc_lot_t::text1=Text
  * - DC_QR_URL with dc_lot_t::text1=URL
  * - DC_QR_ERROR with dc_lot_t::text1=Error string
  *
- *
  * @memberof dc_context_t
  * @param context The context object.
  * @param qr The text of the scanned QR code.
diff --git a/src/lot.rs b/src/lot.rs
index e1c14e6e3..c1f27eae0 100644
--- a/src/lot.rs
+++ b/src/lot.rs
@@ -86,6 +86,9 @@ pub enum LotState {
     /// test1=formatted fingerprint
     QrFprWithoutAddr = 230,
 
+    /// text1=domain
+    QrAccount = 250,
+
     /// id=contact
     QrAddr = 320,
 
diff --git a/src/qr.rs b/src/qr.rs
index 76bd9c6f1..1f93dcded 100644
--- a/src/qr.rs
+++ b/src/qr.rs
@@ -13,8 +13,10 @@ use crate::key::dc_normalize_fingerprint;
 use crate::lot::{Lot, LotState};
 use crate::param::*;
 use crate::peerstate::*;
+use reqwest::Url;
 
 const OPENPGP4FPR_SCHEME: &str = "OPENPGP4FPR:"; // yes: uppercase
+const DCACCOUNT_SCHEME: &str = "DCACCOUNT:";
 const MAILTO_SCHEME: &str = "mailto:";
 const MATMSG_SCHEME: &str = "MATMSG:";
 const VCARD_SCHEME: &str = "BEGIN:VCARD";
@@ -43,6 +45,8 @@ pub fn check_qr(context: &Context, qr: impl AsRef<str>) -> Lot {
 
     if qr.starts_with(OPENPGP4FPR_SCHEME) {
         decode_openpgp(context, qr)
+    } else if qr.starts_with(DCACCOUNT_SCHEME) {
+        decode_account(context, qr)
     } else if qr.starts_with(MAILTO_SCHEME) {
         decode_mailto(context, qr)
     } else if qr.starts_with(SMTP_SCHEME) {
@@ -179,6 +183,28 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
     lot
 }
 
+/// scheme: `DCACCOUNT:https://example.org/new_email?t=1w_7wDjgjelxeX884x96v3`
+fn decode_account(_context: &Context, qr: &str) -> Lot {
+    let payload = &qr[DCACCOUNT_SCHEME.len()..];
+
+    let mut lot = Lot::new();
+
+    if let Ok(url) = Url::parse(payload) {
+        if url.scheme() == "https" {
+            lot.state = LotState::QrAccount;
+            lot.text1 = url.host_str().map(|x| x.to_string());
+        } else {
+            lot.state = LotState::QrError;
+            lot.text1 = Some(format!("Bad scheme for account url: {}", payload));
+        }
+    } else {
+        lot.state = LotState::QrError;
+        lot.text1 = Some(format!("Invalid account url: {}", payload));
+    }
+
+    lot
+}
+
 /// Extract address for the mailto scheme.
 ///
 /// Scheme: `mailto:addr...?subject=...&body=..`
@@ -493,4 +519,28 @@ mod tests {
         assert_eq!(res.get_state(), LotState::QrError);
         assert_eq!(res.get_id(), 0);
     }
+
+    #[test]
+    fn test_decode_account() {
+        let ctx = dummy_context();
+
+        let res = check_qr(
+            &ctx.ctx,
+            "DCACCOUNT:https://example.org/new_email?t=1w_7wDjgjelxeX884x96v3",
+        );
+        assert_eq!(res.get_state(), LotState::QrAccount);
+        assert_eq!(res.get_text1().unwrap(), "example.org");
+    }
+
+    #[test]
+    fn test_decode_account_bad_scheme() {
+        let ctx = dummy_context();
+
+        let res = check_qr(
+            &ctx.ctx,
+            "DCACCOUNT:http://example.org/new_email?t=1w_7wDjgjelxeX884x96v3",
+        );
+        assert_eq!(res.get_state(), LotState::QrError);
+        assert!(res.get_text1().is_some());
+    }
 }