From adf3889863b002cb79500f38f34019d34e22c22d Mon Sep 17 00:00:00 2001
From: Ruben Rosario <rubenrosario@dev.local>
Date: Sat, 20 Jun 2026 19:35:19 +0100
Subject: [PATCH] chore: initial project setup

- Cargo init with dependencies (ratatui, crossterm, tokio, reqwest, rusqlite, serde, chrono, dirs)
- Module structure: domain/, ui/, infrastructure/
- Domain models (TaskList, Task, TaskStatus, SyncAction, SyncQueueItem)
- .gitignore for target/ and *.db
- Rustls-based TLS (no OpenSSL dependency)
---
 .gitignore                     |    2 +
 Cargo.lock                     | 1958 ++++++++++++++++++++++++++++++++
 Cargo.toml                     |   16 +
 requisitos_app_google_tasks.md |   60 +
 src/domain/mod.rs              |    1 +
 src/domain/models.rs           |   43 +
 src/infrastructure/api.rs      |    1 +
 src/infrastructure/db.rs       |    1 +
 src/infrastructure/mod.rs      |    2 +
 src/main.rs                    |    7 +
 src/ui/components.rs           |    1 +
 src/ui/mod.rs                  |    1 +
 12 files changed, 2093 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 requisitos_app_google_tasks.md
 create mode 100644 src/domain/mod.rs
 create mode 100644 src/domain/models.rs
 create mode 100644 src/infrastructure/api.rs
 create mode 100644 src/infrastructure/db.rs
 create mode 100644 src/infrastructure/mod.rs
 create mode 100644 src/main.rs
 create mode 100644 src/ui/components.rs
 create mode 100644 src/ui/mod.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bd7ebb0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+target/
+*.db
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a385a02
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1958 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3295c9c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "task_app"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+ratatui = "0.28"
+crossterm = "0.28"
+tokio = { version = "1", features = ["full"] }
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
+rusqlite = { version = "0.32", features = ["bundled"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+chrono = { version = "0.4", features = ["serde"] }
+dirs = "6"
+url = "2"
diff --git a/requisitos_app_google_tasks.md b/requisitos_app_google_tasks.md
new file mode 100644
index 0000000..5e432e3
--- /dev/null
+++ b/requisitos_app_google_tasks.md
@@ -0,0 +1,60 @@
+# Contexto do Projeto
+Atua como um programador Rust sénior e especialista em interfaces de terminal (TUI). O teu objetivo é implementar uma aplicação de gestão de tarefas de linha de comandos (CLI/TUI) que se integra com o Google Tasks. 
+
+A aplicação deve adotar a filosofia "Offline-First", guardando as tarefas localmente e sincronizando com a cloud em pano de fundo quando houver ligação à internet.
+
+# Stack Tecnológica
+* **Linguagem:** Rust
+* **UI:** `ratatui` + `crossterm`
+* **Assincronismo:** `tokio`
+* **HTTP:** `reqwest`
+* **Autenticação:** `yup-oauth2` (usando o Device Authorization Flow)
+* **Base de Dados Local:** `rusqlite` (SQLite local para guardar tarefas e fila de sincronização)
+* **Serialização:** `serde` + `serde_json`
+
+# Arquitetura de Ficheiros (Clean Architecture + MVU)
+Organiza o código estritamente com a seguinte estrutura:
+
+```text
+src/
+├── main.rs            # Ponto de entrada, inicialização do terminal e DB
+├── app.rs             # Estado da aplicação (App struct) e processamento de eventos
+├── domain/            # Lógica pura e modelos de dados
+│   ├── mod.rs
+│   └── models.rs      # Structs de Tarefa, Lista e Eventos de Sincronização
+├── ui/                # Renderização Ratatui
+│   ├── mod.rs         # Layout principal
+│   └── components.rs  # Widgets (Tabs, Listas, Pop-ups)
+└── infrastructure/    # Efeitos colaterais e I/O
+    ├── mod.rs
+    ├── db.rs          # Inicialização do SQLite, queries CRUD e fila offline
+    └── api.rs         # Integração com Google Tasks API e OAuth2
+```
+
+# Requisitos Principais
+
+## 1. Interface de Utilizador (UI) e Layout
+* O ecrã deve estar dividido numa grelha rigorosa:
+  * **Topo (Tabs):** Uma linha horizontal a representar as **Listas de Tarefas**. Deve ser possível navegar entre elas e adicionar novas listas.
+  * **Corpo Principal (Split View):** Abaixo das listas, o ecrã divide-se em dois painéis verticais:
+    * **Painel da Esquerda (Lista de Tasks):** Apresenta as tarefas da lista atualmente selecionada. A data e hora dos lembretes (`due dates`) devem ser visíveis diretamente nesta lista, ao lado ou por baixo do título da tarefa.
+    * **Painel da Direita (Detalhes):** Mostra as notas, descrição longa e/ou sub-tarefas da tarefa atualmente selecionada no painel esquerdo.
+
+## 2. Interação e Atalhos (UX)
+* **Navegação de Painéis:** A mudança de foco entre os três grandes blocos (Tabs no Topo, Painel Esquerdo e Painel Direito) deve ser feita usando a combinação de teclas `Tab + Setas`. 
+* **Navegação Interna:** Uma vez dentro de um painel, a navegação entre os itens faz-se apenas com as setas do teclado (não usar atalhos tipo Vim com `j/k`).
+* **Reordenação Persistente:** O utilizador deve conseguir organizar as tarefas na lista usando o atalho `Alt + Setas` (Cima/Baixo). Esta ordenação customizada tem de ficar gravada na base de dados para se manter exatamente igual entre sessões.
+* **Operações CRUD:** Deve ser possível Adicionar, Editar e Apagar qualquer Lista ou Tarefa.
+* **Edição de Datas (Pop-up):** Quando o utilizador for editar a data/hora de uma tarefa, a aplicação deve abrir um modal/Pop-up interativo sobreposto ao centro do ecrã para facilitar a introdução desses dados.
+* O estado da rede ("Online" / "Offline" / "A Sincronizar...") deve ser apresentado num rodapé discreto.
+
+## 3. Base de Dados Local (Offline-First)
+* Usa o SQLite para criar um ficheiro local (ex: `tasks.db`).
+* **Tabela `tasks`:** Deve espelhar a estrutura de uma Google Task (ID, Title, Notes, Status, Due, Position/Order). A coluna de posição é crítica para garantir que a ordenação do utilizador não se perde ao reiniciar a aplicação.
+* **Tabela `sync_queue`:** Fundamental para o funcionamento offline. Deve registar a ação pendente (CREATE, UPDATE, DELETE, REORDER), o ID local/remoto e o payload em JSON.
+* A interface (`app.rs` e `ui/`) lê **exclusivamente** do SQLite, garantindo que o carregamento da interface é imediato e não bloqueia à espera de respostas de rede.
+
+## 4. Motor de Sincronização (Sync Engine)
+* Quando o utilizador cria, edita, apaga ou reordena uma tarefa, a ação e a nova ordem (position) são registadas no SQLite.
+* Uma *task* assíncrona do Tokio processa a fila de sincronização em pano de fundo quando deteta ligação à internet, chamando a API oficial do Google Tasks via `reqwest`. A reordenação deve refletir-se também na cloud.
+* Se não houver token de acesso guardado, a TUI deve apresentar um Pop-up a pedir para o utilizador visitar o URL de autorização e introduzir o código gerado pelo `yup-oauth2`.
\ No newline at end of file
diff --git a/src/domain/mod.rs b/src/domain/mod.rs
new file mode 100644
index 0000000..c446ac8
--- /dev/null
+++ b/src/domain/mod.rs
@@ -0,0 +1 @@
+pub mod models;
diff --git a/src/domain/models.rs b/src/domain/models.rs
new file mode 100644
index 0000000..0769681
--- /dev/null
+++ b/src/domain/models.rs
@@ -0,0 +1,43 @@
+use chrono::NaiveDateTime;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct TaskList {
+    pub id: String,
+    pub title: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct Task {
+    pub id: String,
+    pub list_id: String,
+    pub title: String,
+    pub notes: Option<String>,
+    pub status: TaskStatus,
+    pub due: Option<NaiveDateTime>,
+    pub position: i64,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub enum TaskStatus {
+    NeedsAction,
+    Completed,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub enum SyncAction {
+    Create,
+    Update,
+    Delete,
+    Reorder,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SyncQueueItem {
+    pub id: i64,
+    pub action: SyncAction,
+    pub task_id: String,
+    pub list_id: String,
+    pub payload: String,
+    pub created_at: String,
+}
diff --git a/src/infrastructure/api.rs b/src/infrastructure/api.rs
new file mode 100644
index 0000000..0116a35
--- /dev/null
+++ b/src/infrastructure/api.rs
@@ -0,0 +1 @@
+// TODO: Fase 5 - Google Tasks API integration
diff --git a/src/infrastructure/db.rs b/src/infrastructure/db.rs
new file mode 100644
index 0000000..ca8365d
--- /dev/null
+++ b/src/infrastructure/db.rs
@@ -0,0 +1 @@
+// TODO: Fase 2 - SQLite storage implementation
diff --git a/src/infrastructure/mod.rs b/src/infrastructure/mod.rs
new file mode 100644
index 0000000..e52e187
--- /dev/null
+++ b/src/infrastructure/mod.rs
@@ -0,0 +1,2 @@
+pub mod db;
+pub mod api;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..e29e268
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,7 @@
+mod domain;
+mod ui;
+mod infrastructure;
+
+fn main() {
+    println!("Task App - Google Tasks TUI");
+}
diff --git a/src/ui/components.rs b/src/ui/components.rs
new file mode 100644
index 0000000..f88397e
--- /dev/null
+++ b/src/ui/components.rs
@@ -0,0 +1 @@
+// TODO: Fase 3 - Ratatui widgets
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
new file mode 100644
index 0000000..f188f2c
--- /dev/null
+++ b/src/ui/mod.rs
@@ -0,0 +1 @@
+pub mod components;