add provider info function

deltachat-ffi/Cargo.toml

@@ -20,6 +20,9 @@ libc = "0.2"
 human-panic = "1.0.1"
 num-traits = "0.2.6"
 
+deltachat-provider-overview = { git = "https://github.com/deltachat/provider-overview", rev = "e52d915c05232c40284387bfe13862c6a2293060" }
+serde_json = "1.0"
+
 [features]
 default = ["vendored", "nightly", "ringbuf"]
 vendored = ["deltachat/vendored"]

deltachat-ffi/deltachat.h

@@ -441,7 +441,11 @@ char*           dc_get_info                  (dc_context_t* context);
  */
 char*           dc_get_oauth2_url            (dc_context_t* context, const char* addr, const char* redirect_uri);
 
+/**
+ * Get the provider information from our provider overview as json object.
+ */
 
+char*           dc_get_json_provider_info_from_email  (char* email);
 
 // connect
 

deltachat-ffi/src/lib.rs

@@ -16,6 +16,8 @@ use std::convert::TryInto;
 use std::ptr;
 use std::str::FromStr;
 
+extern crate deltachat_provider_overview;
+
 use deltachat::contact::Contact;
 use deltachat::dc_tools::{as_str, dc_strdup, StrExt};
 use deltachat::*;
@@ -2530,6 +2532,20 @@ fn as_opt_str<'a>(s: *const libc::c_char) -> Option<&'a str> {
     Some(dc_tools::as_str(s))
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn dc_get_json_provider_info_from_email (
+    email: *const libc::c_char,
+) -> *mut libc::c_char {
+    let option = deltachat_provider_overview::get_provider_info(
+        deltachat_provider_overview::get_domain_from_email(dc_tools::as_str(email)),
+    );
+    if let Some(provider) = option {
+        serde_json::to_string(provider.0).unwrap().strdup()
+    } else {
+        dc_strdup(ptr::null())
+    }
+} 
+
 pub trait ResultExt<T> {
     fn unwrap_or_log_default(self, context: &context::Context, message: &str) -> T;
     fn log_err(&self, context: &context::Context, message: &str);