Initial adapotion to postgres

Cargo.toml

@@ -35,3 +35,7 @@ bcrypt = "0.3"
 [dependencies.serde_json]
 version = "1.0.20"
 features = ["preserve_order"]
+
+[dependencies.postgres]
+version = "0.15"
+features = ["with-time"]
\ No newline at end of file

src/configreader_yaml.rs

@@ -56,7 +56,7 @@ pub fn parse_yaml(content: &str, filename: &str, directory: &str) -> Option<Cont
                             if let Some(serde_yaml::Value::Number(cstars)) =
                                 taskinfo.get(&serde_yaml::Value::String("stars".to_string()))
                             {
-                                stars = cstars.as_u64().unwrap() as u8;
+                                stars = cstars.as_u64().unwrap() as i8;
                             }
                             let task = Task::new(taskdir, stars);
                             taskgroup.tasks.push(task);

src/db_objects.rs

@@ -25,7 +25,7 @@ pub struct SessionUser {
     pub zip: Option<String>,
     pub city: Option<String>,
     pub nation: Option<String>,
-    pub grade: u8,
+    pub grade: i8,
 
     pub is_teacher: bool,
     pub managed_by: Option<u32>,
@@ -81,16 +81,16 @@ pub struct Task {
     pub id: Option<u32>,
     pub taskgroup: u32,
     pub location: String,
-    pub stars: u8,
+    pub stars: i8,
 }
 
 pub struct Submission {
     pub id: Option<u32>,
     pub session_user: u32,
     pub task: u32,
-    pub grade: u8,
+    pub grade: i8,
     pub validated: bool,
-    pub nonvalidated_grade: u8,
+    pub nonvalidated_grade: i8,
     pub needs_validation: bool,
     pub subtask_identifier: Option<String>,
     pub value: String,
@@ -101,7 +101,7 @@ pub struct Submission {
 pub struct Grade {
     pub taskgroup: u32,
     pub user: u32,
-    pub grade: Option<u8>,
+    pub grade: Option<i8>,
     pub validated: bool,
 }
 
@@ -227,7 +227,7 @@ impl Taskgroup {
 }
 
 impl Task {
-    pub fn new(location: String, stars: u8) -> Self {
+    pub fn new(location: String, stars: i8) -> Self {
         Task { id: None, taskgroup: 0, location: location, stars: stars }
     }
 }

src/functions.rs

@@ -368,7 +368,7 @@ pub fn load_submission<T: MedalConnection>(conn: &T, task_id: u32, session_token
 }
 
 pub fn save_submission<T: MedalConnection>(conn: &T, task_id: u32, session_token: &str, csrf_token: &str,
-                                           data: String, grade: u8, subtask: Option<String>)
+                                           data: String, grade: i8, subtask: Option<String>)
                                            -> MedalResult<String>
 {
     let session = conn.get_session(&session_token)
@@ -499,7 +499,7 @@ pub struct MemberInfo {
     pub id: u32,
     pub firstname: String,
     pub lastname: String,
-    pub grade: u8,
+    pub grade: i8,
     pub logincode: String,
 }
 
@@ -674,7 +674,7 @@ impl std::convert::Into<String> for ProfileStatus {
 pub fn edit_profile<T: MedalConnection>(conn: &T, session_token: &str, user_id: Option<u32>, csrf_token: &str,
                                         firstname: String, lastname: String, street: Option<String>,
                                         zip: Option<String>, city: Option<String>, password: Option<String>,
-                                        password_repeat: Option<String>, grade: u8)
+                                        password_repeat: Option<String>, grade: i8)
                                         -> MedalResult<ProfileStatus>
 {
     let mut session = conn.get_session(&session_token)

src/main.rs

@@ -27,6 +27,7 @@ use rusqlite::Connection;
 mod db_apply_migrations;
 mod db_conn;
 mod db_conn_sqlite;
+mod db_conn_postgres;
 mod db_objects;
 
 use db_conn::{MedalConnection, MedalObject};

src/webfw_iron.rs

@@ -460,7 +460,7 @@ fn submission_post(req: &mut Request) -> IronResult<Response> {
         let formdata = iexpect!(req.get_ref::<UrlEncodedBody>().ok());
         (iexpect!(formdata.get("csrf"),(status::BadRequest, mime!(Text/Html), format!("400 Bad Request")))[0].to_owned(),
          iexpect!(formdata.get("data"),(status::BadRequest, mime!(Text/Html), format!("400 Bad Request")))[0].to_owned(),
-         iexpect!(formdata.get("grade").unwrap_or(&vec!["0".to_owned()])[0].parse::<u8>().ok(),(status::BadRequest, mime!(Text/Html), format!("400 Bad Request"))),
+         iexpect!(formdata.get("grade").unwrap_or(&vec!["0".to_owned()])[0].parse::<i8>().ok(),(status::BadRequest, mime!(Text/Html), format!("400 Bad Request"))),
          formdata.get("subtask").map(|x| x[0].to_owned()),
         )
     };
@@ -560,7 +560,7 @@ fn profile_post(req: &mut Request) -> IronResult<Response> {
          formdata.get("city").map(|x| x[0].to_owned()),
          formdata.get("password").map(|x| x[0].to_owned()),
          formdata.get("password_repeat").map(|x| x[0].to_owned()),
-         iexpect!(formdata.get("grade"))[0].parse::<u8>().unwrap_or(0))
+         iexpect!(formdata.get("grade"))[0].parse::<i8>().unwrap_or(0))
     };
 
     let profilechangeresult = with_conn![functions::edit_profile,
@@ -609,7 +609,7 @@ fn user_post(req: &mut Request) -> IronResult<Response> {
          formdata.get("city").map(|x| x[0].to_owned()),
          formdata.get("password").map(|x| x[0].to_owned()),
          formdata.get("password_repeat").map(|x| x[0].to_owned()),
-         iexpect!(formdata.get("grade"))[0].parse::<u8>().unwrap_or(0))
+         iexpect!(formdata.get("grade"))[0].parse::<i8>().unwrap_or(0))
     };
 
     let profilechangeresult = with_conn![functions::edit_profile,