From 8b4edc46a7ac31e276beb0922e87f0a7f17bc9f7 Mon Sep 17 00:00:00 2001
From: "B. Petersen" <r10s@b44t.com>
Date: Tue, 11 Feb 2020 02:12:44 +0100
Subject: [PATCH] implement dc_set_config_from_qr()

---
 deltachat-ffi/src/lib.rs |  8 ++++++-
 examples/repl/cmdline.rs |  4 ++++
 src/qr.rs                | 51 +++++++++++++++++++++++++++++++++++-----
 3 files changed, 56 insertions(+), 7 deletions(-)

diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 3f13361e1..a37d84db4 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -435,7 +435,13 @@ pub unsafe extern "C" fn dc_set_config_from_qr(
     let qr = to_string_lossy(qr);
     let ffi_context = &*context;
     ffi_context
-        .with_inner(|ctx| qr::set_config_from_qr(ctx, &qr) as libc::c_int)
+        .with_inner(|ctx| match qr::set_config_from_qr(ctx, &qr) {
+            Ok(()) => 1,
+            Err(err) => {
+                error!(ctx, "Failed to create account from QR code: {}", err);
+                0
+            }
+        })
         .unwrap_or(0)
 }
 
diff --git a/examples/repl/cmdline.rs b/examples/repl/cmdline.rs
index b944a9577..79bb8ebe7 100644
--- a/examples/repl/cmdline.rs
+++ b/examples/repl/cmdline.rs
@@ -967,6 +967,10 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                 res.get_text2()
             );
         }
+        "setqr" => {
+            ensure!(!arg1.is_empty(), "Argument <qr-content> missing.");
+            set_config_from_qr(context, arg1);
+        }
         "providerinfo" => {
             ensure!(!arg1.is_empty(), "Argument <addr> missing.");
             match provider::get_provider_info(arg1) {
diff --git a/src/qr.rs b/src/qr.rs
index a8955c78e..15e4cbc69 100644
--- a/src/qr.rs
+++ b/src/qr.rs
@@ -4,6 +4,7 @@ use lazy_static::lazy_static;
 use percent_encoding::percent_decode_str;
 
 use crate::chat;
+use crate::config::*;
 use crate::constants::Blocked;
 use crate::contact::*;
 use crate::context::Context;
@@ -14,6 +15,7 @@ use crate::lot::{Lot, LotState};
 use crate::param::*;
 use crate::peerstate::*;
 use reqwest::Url;
+use serde::Deserialize;
 
 const OPENPGP4FPR_SCHEME: &str = "OPENPGP4FPR:"; // yes: uppercase
 const DCACCOUNT_SCHEME: &str = "DCACCOUNT:";
@@ -205,12 +207,49 @@ fn decode_account(_context: &Context, qr: &str) -> Lot {
     lot
 }
 
-pub fn set_config_from_qr(context: &Context, qr: &str) -> bool {
-    error!(
-        context,
-        "Setting config from QR is not yet implemented :/ QR code: {}", qr
-    );
-    false
+#[derive(Debug, Deserialize)]
+struct CreateAccountResponse {
+    email: String,
+    password: String,
+}
+
+/// take a qr of the type DC_QR_ACCOUNT, parse it's parameters,
+/// download additional information from the contained url and set the parameters.
+/// on success, a configure::configure() should be able to log in to the account
+pub fn set_config_from_qr(context: &Context, qr: &str) -> Result<(), Error> {
+    let url_str = &qr[DCACCOUNT_SCHEME.len()..];
+
+    let response = reqwest::blocking::Client::new().post(url_str).send();
+    if response.is_err() {
+        return Err(format_err!(
+            "Cannot create account, request to {} failed",
+            url_str
+        ));
+    }
+    let response = response.unwrap();
+    if !response.status().is_success() {
+        return Err(format_err!(
+            "Request to {} unsuccessful: {:?}",
+            url_str,
+            response
+        ));
+    }
+
+    let parsed: reqwest::Result<CreateAccountResponse> = response.json();
+    if parsed.is_err() {
+        return Err(format_err!(
+            "Failed to parse JSON response from {}: error: {:?}",
+            url_str,
+            parsed
+        ));
+    }
+    println!("response: {:?}", &parsed);
+    let parsed = parsed.unwrap();
+
+    context.set_config(Config::Addr, Some(&parsed.email))?;
+    context.set_config(Config::MailPw, Some(&parsed.password))?;
+
+    Ok(())
 }
 
 /// Extract address for the mailto scheme.