adding basic presentation_model.rs

build.rs

@@ -9,5 +9,6 @@ fn main() {
         .file("src/rust/slide_model.rs")
         .file("src/rust/image_model.rs")
         .file("src/rust/video_model.rs")
+        .file("src/rust/presentation_model.rs")
         .build();
 }

src/rust/lib.rs

@@ -17,6 +17,7 @@
 mod file_helper;
 pub mod image_model;
 pub mod models;
+pub mod presentation_model;
 pub mod schema;
 mod service_thing;
 mod settings;

src/rust/models.rs

@@ -16,3 +16,11 @@ pub struct Video {
     pub end_time: Option<f32>,
     pub looping: bool,
 }
+
+#[derive(Queryable)]
+pub struct Presentation {
+    pub id: i32,
+    pub title: String,
+    pub path: String,
+    pub page_count: Option<i32>,
+}

src/rust/presentation_model.rs

@@ -0,0 +1,323 @@
+#[cxx_qt::bridge]
+mod presentation_model {
+    use crate::models::*;
+    use crate::presentation_model::presentation_model::Presentation;
+    use crate::schema::presentations::dsl::*;
+    use diesel::sqlite::SqliteConnection;
+    use diesel::{delete, insert_into, prelude::*};
+    use std::path::{Path, PathBuf};
+
+    unsafe extern "C++" {
+        include!(< QAbstractListModel >);
+        include!("cxx-qt-lib/qhash.h");
+        type QHash_i32_QByteArray = cxx_qt_lib::QHash<cxx_qt_lib::QHashPair_i32_QByteArray>;
+        include!("cxx-qt-lib/qmap.h");
+        type QMap_QString_QVariant = cxx_qt_lib::QMap<cxx_qt_lib::QMapPair_QString_QVariant>;
+        include!("cxx-qt-lib/qvariant.h");
+        type QVariant = cxx_qt_lib::QVariant;
+        include!("cxx-qt-lib/qstring.h");
+        type QString = cxx_qt_lib::QString;
+        include!("cxx-qt-lib/qurl.h");
+        type QUrl = cxx_qt_lib::QUrl;
+        include!("cxx-qt-lib/qmodelindex.h");
+        type QModelIndex = cxx_qt_lib::QModelIndex;
+        include!("cxx-qt-lib/qvector.h");
+        type QVector_i32 = cxx_qt_lib::QVector<i32>;
+        include!("cxx-qt-lib/qstringlist.h");
+        type QStringList = cxx_qt_lib::QStringList;
+        include!("cxx-qt-lib/qlist.h");
+        type QList_QString = cxx_qt_lib::QList<QString>;
+    }
+
+    #[derive(Default, Clone, Debug)]
+    pub struct Presentation {
+        id: i32,
+        title: QString,
+        path: QString,
+    }
+
+    #[cxx_qt::qobject(base = "QAbstractListModel")]
+    #[derive(Default, Debug)]
+    pub struct PresentationModel {
+        highest_id: i32,
+        presentations: Vec<self::Presentation>,
+    }
+
+    #[cxx_qt::qsignals(PresentationModel)]
+    pub enum Signals<'a> {
+        #[inherit]
+        DataChanged {
+            top_left: &'a QModelIndex,
+            bottom_right: &'a QModelIndex,
+            roles: &'a QVector_i32,
+        },
+    }
+
+    enum Role {
+        IdRole,
+        PathRole,
+        TitleRole,
+    }
+
+    // use crate::entities::{presentations, prelude::Presentations};
+    // use sea_orm::{ConnectionTrait, Database, DbBackend, DbErr, Statement, ActiveValue};
+    impl qobject::PresentationModel {
+        #[qinvokable]
+        pub fn clear(mut self: Pin<&mut Self>) {
+            unsafe {
+                self.as_mut().begin_reset_model();
+                self.as_mut().presentations_mut().clear();
+                self.as_mut().end_reset_model();
+            }
+        }
+
+        #[qinvokable]
+        pub fn test_database(mut self: Pin<&mut Self>) {
+            let db = &mut self.as_mut().get_db();
+            let results = presentations
+                .load::<crate::models::Presentation>(db)
+                .expect("Error loading presentations");
+            self.as_mut().set_highest_id(0);
+
+            println!("SHOWING PRESENTATIONS");
+            println!("--------------");
+            for presentation in results {
+                println!("{}", presentation.title);
+                println!("{}", presentation.id);
+                println!("{}", presentation.path);
+                println!("--------------");
+                if self.as_mut().highest_id() < &presentation.id {
+                    self.as_mut().set_highest_id(presentation.id);
+                }
+
+                let img = self::Presentation {
+                    id: presentation.id,
+                    title: QString::from(&presentation.title),
+                    path: QString::from(&presentation.path),
+                };
+
+                self.as_mut().add_presentation(img);
+            }
+            println!("--------------------------------------");
+            println!("{:?}", self.as_mut().presentations());
+            println!("--------------------------------------");
+        }
+
+        #[qinvokable]
+        pub fn remove_item(mut self: Pin<&mut Self>, index: i32) -> bool {
+            if index < 0 || (index as usize) >= self.presentations().len() {
+                return false;
+            }
+            let db = &mut self.as_mut().get_db();
+
+            let presentation_id = self.presentations().get(index as usize).unwrap().id;
+
+            let result = delete(presentations.filter(id.eq(presentation_id))).execute(db);
+
+            match result {
+                Ok(_i) => {
+                    unsafe {
+                        self.as_mut()
+                            .begin_remove_rows(&QModelIndex::default(), index, index);
+                        self.as_mut().presentations_mut().remove(index as usize);
+                        self.as_mut().end_remove_rows();
+                    }
+                    println!("removed-item-at-index: {:?}", presentation_id);
+                    println!("new-Vec: {:?}", self.as_mut().presentations());
+                    true
+                }
+                Err(_e) => {
+                    println!("Cannot connect to database");
+                    false
+                }
+            }
+        }
+
+        fn get_db(self: Pin<&mut Self>) -> SqliteConnection {
+            const DATABASE_URL: &str = "sqlite:///home/chris/.local/share/librepresenter/Libre Presenter/library-db.sqlite3";
+
+            SqliteConnection::establish(DATABASE_URL)
+                .unwrap_or_else(|_| panic!("error connecting to {}", DATABASE_URL))
+            // self.rust().db = db;
+        }
+
+        #[qinvokable]
+        pub fn new_item(mut self: Pin<&mut Self>, url: QUrl) {
+            println!("LETS INSERT THIS SUCKER!");
+            let file_path = PathBuf::from(url.path().to_string());
+            let name = file_path.file_stem().unwrap().to_str().unwrap();
+            let presentation_id = self.rust().highest_id + 1;
+            let presentation_title = QString::from(name);
+            let presentation_path = url.to_qstring();
+
+            if self
+                .as_mut()
+                .add_item(presentation_id, presentation_title, presentation_path)
+            {
+                println!("filename: {:?}", name);
+                self.as_mut().set_highest_id(presentation_id);
+            } else {
+                println!("Error in inserting item");
+            }
+        }
+
+        #[qinvokable]
+        pub fn add_item(
+            mut self: Pin<&mut Self>,
+            presentation_id: i32,
+            presentation_title: QString,
+            presentation_path: QString,
+        ) -> bool {
+            let db = &mut self.as_mut().get_db();
+            // println!("{:?}", db);
+            let presentation = self::Presentation {
+                id: presentation_id,
+                title: presentation_title.clone(),
+                path: presentation_path.clone(),
+            };
+            println!("{:?}", presentation);
+
+            let result = insert_into(presentations)
+                .values((
+                    id.eq(&presentation_id),
+                    title.eq(&presentation_title.to_string()),
+                    path.eq(&presentation_path.to_string()),
+                ))
+                .execute(db);
+            println!("{:?}", result);
+
+            match result {
+                Ok(_i) => {
+                    self.as_mut().add_presentation(presentation);
+                    println!("{:?}", self.as_mut().presentations());
+                    true
+                }
+                Err(_e) => {
+                    println!("Cannot connect to database");
+                    false
+                }
+            }
+        }
+
+        fn add_presentation(mut self: Pin<&mut Self>, presentation: self::Presentation) {
+            let index = self.as_ref().presentations().len() as i32;
+            println!("{:?}", presentation);
+            unsafe {
+                self.as_mut()
+                    .begin_insert_rows(&QModelIndex::default(), index, index);
+                self.as_mut().presentations_mut().push(presentation);
+                self.as_mut().end_insert_rows();
+            }
+        }
+
+        #[qinvokable]
+        pub fn get_item(self: Pin<&mut Self>, index: i32) -> QMap_QString_QVariant {
+            println!("{index}");
+            let mut qvariantmap = QMap_QString_QVariant::default();
+            let idx = self.index(index, 0, &QModelIndex::default());
+            if !idx.is_valid() {
+                return qvariantmap;
+            }
+            let role_names = self.as_ref().role_names();
+            let role_names_iter = role_names.iter();
+            if let Some(presentation) = self.rust().presentations.get(index as usize) {
+                for i in role_names_iter {
+                    qvariantmap.insert(
+                        QString::from(&i.1.to_string()),
+                        self.as_ref().data(&idx, *i.0),
+                    );
+                }
+            };
+            qvariantmap
+        }
+
+        fn get_role(&self, role: Role) -> i32 {
+            match role {
+                Role::IdRole => 0,
+                Role::TitleRole => 1,
+                Role::PathRole => 2,
+                _ => 0,
+            }
+        }
+    }
+
+    // Create Rust bindings for C++ functions of the base class (QAbstractItemModel)
+    #[cxx_qt::inherit]
+    extern "C++" {
+        unsafe fn begin_insert_rows(
+            self: Pin<&mut qobject::PresentationModel>,
+            parent: &QModelIndex,
+            first: i32,
+            last: i32,
+        );
+        unsafe fn end_insert_rows(self: Pin<&mut qobject::PresentationModel>);
+
+        unsafe fn begin_remove_rows(
+            self: Pin<&mut qobject::PresentationModel>,
+            parent: &QModelIndex,
+            first: i32,
+            last: i32,
+        );
+        unsafe fn end_remove_rows(self: Pin<&mut qobject::PresentationModel>);
+
+        unsafe fn begin_reset_model(self: Pin<&mut qobject::PresentationModel>);
+        unsafe fn end_reset_model(self: Pin<&mut qobject::PresentationModel>);
+    }
+
+    #[cxx_qt::inherit]
+    unsafe extern "C++" {
+        #[cxx_name = "canFetchMore"]
+        fn base_can_fetch_more(self: &qobject::PresentationModel, parent: &QModelIndex) -> bool;
+
+        fn index(
+            self: &qobject::PresentationModel,
+            row: i32,
+            column: i32,
+            parent: &QModelIndex,
+        ) -> QModelIndex;
+    }
+
+    // QAbstractListModel implementation
+    impl qobject::PresentationModel {
+        #[qinvokable(cxx_override)]
+        fn data(&self, index: &QModelIndex, role: i32) -> QVariant {
+            if let Some(presentation) = self.presentations().get(index.row() as usize) {
+                return match role {
+                    0 => QVariant::from(&presentation.id),
+                    1 => QVariant::from(&presentation.title),
+                    2 => QVariant::from(&presentation.path),
+                    _ => QVariant::default(),
+                };
+            }
+
+            QVariant::default()
+        }
+
+        // Example of overriding a C++ virtual method and calling the base class implementation.
+        #[qinvokable(cxx_override)]
+        pub fn can_fetch_more(&self, parent: &QModelIndex) -> bool {
+            self.base_can_fetch_more(parent)
+        }
+
+        #[qinvokable(cxx_override)]
+        pub fn role_names(&self) -> QHash_i32_QByteArray {
+            let mut roles = QHash_i32_QByteArray::default();
+            roles.insert(0, cxx_qt_lib::QByteArray::from("id"));
+            roles.insert(1, cxx_qt_lib::QByteArray::from("title"));
+            roles.insert(2, cxx_qt_lib::QByteArray::from("filePath"));
+            roles
+        }
+
+        #[qinvokable(cxx_override)]
+        pub fn row_count(&self, _parent: &QModelIndex) -> i32 {
+            let cnt = self.rust().presentations.len() as i32;
+            // println!("row count is {cnt}");
+            cnt
+        }
+
+        #[qinvokable]
+        pub fn count(&self) -> i32 {
+            self.rust().presentations.len() as i32
+        }
+    }
+}

src/rust/schema.rs

@@ -13,8 +13,10 @@ diesel::table! {
     presentations (id) {
         id -> Integer,
         title -> Text,
-        filePath -> Text,
+        #[sql_name = "filePath"]
-        pageCount -> Nullable<Integer>,
+        path -> Text,
+        #[sql_name = "pageCount"]
+        page_count -> Nullable<Integer>,
     }
 }