Core is done

src/cli.rs

@@ -1,4 +1,6 @@
-use clap::{arg, Parser, Subcommand};
+use clap::{arg, Parser, ValueEnum};
+
+use crate::ecb_url;
 
 #[derive(Debug, Parser)]
 #[command(author, version, about)]
@@ -7,25 +9,44 @@ pub struct Cli {
     /// Which currencies do you want to fetch rates for?
     #[arg(long = "currencies", short = 'c')]
     pub currencies: Vec<String>,
-    /// Which subcommand (output format) we are using
-    #[command(subcommand)]
-    pub command: FormatCommand,
+
+    #[arg(value_enum, default_value_t = FormatOption::Plain)]
+    pub command: FormatOption,
+
+    /// Show the time in the output
+    #[arg(long = "display-time")]
+    pub display_time: bool,
+
+    /// Print currencies in a compact single line
+    #[arg(long = "compact")]
+    pub compact: bool,
+
+    /// Amount of data
+    #[arg(value_enum, default_value_t = Resolution::TODAY, long="resolution", short='r')]
+    pub resolution: Resolution,
 }
 
-/// Subcommand enum for output format
-#[derive(Debug, Subcommand)]
-pub enum FormatCommand {
-    /// Minimal JSON output
-    JSONMin,
-    /// Pretty-printed JSON output
-    JSONPretty,
-    /// Plain line-by-line output (with extra flags)
-    Plain {
-        /// Show the time in the output
-        #[arg(long = "display-time")]
-        display_time: bool,
-        /// Print currencies in a compact single line
-        #[arg(long = "compact")]
-        compact: bool,
-    },
+#[derive(Debug, Clone, Copy, ValueEnum)]
+pub enum Resolution {
+    TODAY,
+    HistDays90,
+    HistDay,
+}
+
+impl Resolution {
+    pub fn to_ecb_url(&self) -> &'static str {
+        match self {
+            Resolution::TODAY => ecb_url::TODAY,
+            Resolution::HistDays90 => ecb_url::hist::DAYS_90,
+            Resolution::HistDay => ecb_url::hist::DAILY,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, ValueEnum)]
+pub enum FormatOption {
+    /// JSON output
+    Json,
+    /// Plain line-by-line output (with extra flags)
+    Plain,
 }