From d01380f7b3efebc9c40a2e71c2ddd635fa936be4 Mon Sep 17 00:00:00 2001
From: DanConwayDev <DanConwayDev@protonmail.com>
Date: Tue, 24 Sep 2024 15:03:58 +0100
Subject: feat(login): login via nip46 QR code

or nostrconnect url string which is a much better UX flow for nip46
---
 src/lib/cli_interactor.rs | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'src/lib/cli_interactor.rs')

diff --git a/src/lib/cli_interactor.rs b/src/lib/cli_interactor.rs
index 4cf6357..dcaccf1 100644
--- a/src/lib/cli_interactor.rs
+++ b/src/lib/cli_interactor.rs
@@ -1,5 +1,6 @@
 use anyhow::{Context, Result};
 use dialoguer::{theme::ColorfulTheme, Confirm, Input, Password};
+use indicatif::TermLike;
 #[cfg(test)]
 use mockall::*;
 
@@ -184,3 +185,50 @@ impl PromptMultiChoiceParms {
         self
     }
 }
+
+#[derive(Debug, Default)]
+pub struct Printer {
+    printed_lines: Vec<String>,
+}
+impl Printer {
+    pub fn println(&mut self, line: String) {
+        eprintln!("{line}");
+        self.printed_lines.push(line);
+    }
+    pub fn println_with_custom_formatting(
+        &mut self,
+        line: String,
+        line_without_formatting: String,
+    ) {
+        eprintln!("{line}");
+        self.printed_lines.push(line_without_formatting);
+    }
+    pub fn printlns(&mut self, lines: Vec<String>) {
+        for line in lines {
+            self.println(line);
+        }
+    }
+    pub fn clear_all(&mut self) {
+        let term = console::Term::stderr();
+        let _ = term.clear_last_lines(count_lines_per_msg_vec(
+            term.width(),
+            &self.printed_lines,
+            0,
+        ));
+        self.printed_lines.drain(..);
+    }
+}
+
+pub fn count_lines_per_msg(width: u16, msg: &str, prefix_len: usize) -> usize {
+    if width == 0 {
+        return 1;
+    }
+    // ((msg_len+prefix) / width).ceil() implemented using Integer Arithmetic
+    ((msg.chars().count() + prefix_len) + (width - 1) as usize) / width as usize
+}
+
+pub fn count_lines_per_msg_vec(width: u16, msgs: &[String], prefix_len: usize) -> usize {
+    msgs.iter()
+        .map(|msg| count_lines_per_msg(width, msg, prefix_len))
+        .sum()
+}
-- 
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