From 8903dedaf556d0032b4f72e76b78fc0b58b44e0d Mon Sep 17 00:00:00 2001
From: edouard <m@edouard.paris>
Date: Tue, 8 Nov 2022 18:11:05 +0100
Subject: [PATCH] fix installer: check if setup exists before install

---
 gui/src/installer/mod.rs      |  2 +-
 gui/src/installer/step/mod.rs | 19 ++++++++++---------
 gui/src/installer/view.rs     | 16 ++++++++++------
 3 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/gui/src/installer/mod.rs b/gui/src/installer/mod.rs
index 60d52124..4b425bcc 100644
--- a/gui/src/installer/mod.rs
+++ b/gui/src/installer/mod.rs
@@ -50,7 +50,7 @@ impl Installer {
                 should_exit: false,
                 current: 0,
                 steps: vec![
-                    Welcome::new(network).into(),
+                    Welcome::new(network, destination_path.clone()).into(),
                     DefineDescriptor::new().into(),
                     RegisterDescriptor::default().into(),
                     DefineBitcoind::new().into(),
diff --git a/gui/src/installer/step/mod.rs b/gui/src/installer/step/mod.rs
index f8add589..38ab8c2a 100644
--- a/gui/src/installer/step/mod.rs
+++ b/gui/src/installer/step/mod.rs
@@ -63,11 +63,18 @@ impl Context {
 
 pub struct Welcome {
     network: bitcoin::Network,
+    data_dir: PathBuf,
 }
 
 impl Welcome {
-    pub fn new(network: bitcoin::Network) -> Self {
-        Self { network }
+    pub fn new(network: bitcoin::Network, data_dir: PathBuf) -> Self {
+        Self { network, data_dir }
+    }
+
+    fn valid(&self) -> bool {
+        let mut network_datadir = self.data_dir.clone();
+        network_datadir.push(self.network.to_string());
+        !network_datadir.exists()
     }
 }
 
@@ -83,13 +90,7 @@ impl Step for Welcome {
         true
     }
     fn view(&self) -> Element<Message> {
-        view::welcome(&self.network)
-    }
-}
-
-impl Default for Welcome {
-    fn default() -> Self {
-        Self::new(bitcoin::Network::Bitcoin)
+        view::welcome(&self.network, self.valid())
     }
 }
 
diff --git a/gui/src/installer/view.rs b/gui/src/installer/view.rs
index 93047802..6940dbea 100644
--- a/gui/src/installer/view.rs
+++ b/gui/src/installer/view.rs
@@ -27,17 +27,21 @@ const NETWORKS: [bitcoin::Network; 4] = [
     bitcoin::Network::Regtest,
 ];
 
-pub fn welcome(network: &bitcoin::Network) -> Element<Message> {
+pub fn welcome(network: &bitcoin::Network, valid: bool) -> Element<Message> {
     container(container(
         column()
             .push(container(
                 pick_list(&NETWORKS[..], Some(*network), message::Message::Network).padding(10),
             ))
-            .push(
-                button::primary(None, "Install")
-                    .on_press(Message::Next)
-                    .width(Length::Units(200)),
-            )
+            .push(if valid {
+                container(
+                    button::primary(None, "Start the install")
+                        .on_press(Message::Next)
+                        .width(Length::Units(200)),
+                )
+            } else {
+                card::warning("A data directory already exists for this network")
+            })
             .width(Length::Fill)
             .height(Length::Fill)
             .padding(100)