Add package yaml

.github/workflows/package.yml

@@ -0,0 +1,51 @@
+name: Build Packages
+
+on:
+  push:
+    tags:
+      - "v*"  # Triggers on tags starting with 'v'
+
+permissions:
+  contents: write  # Needed for creating releases
+
+jobs:
+  build_and_release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - name: Install packaging tools
+        run: |
+          cargo install cargo-deb
+          cargo install cargo-generate-rpm
+
+      - name: Build Debian package
+        run: cargo deb
+
+      - id: get_tag_info
+        name: Get Tag Info
+        run: |
+          tag="${GITHUB_REF##*/}"
+          echo "Found tag: $tag"
+          message=$(git tag -l --format='%(contents)' "$tag")
+          # Set outputs using the recommended environment files approach
+          echo "tag=$tag" >> $GITHUB_OUTPUT
+          echo "message=$message" >> $GITHUB_OUTPUT
+
+      - name: Create GitHub Release
+        uses: ncipollo/release-action@v1
+        with:
+          tag: ${{ steps.get_tag_info.outputs.tag }}
+          name: Release ${{ steps.get_tag_info.outputs.tag }}
+          body: ${{ steps.get_tag_info.outputs.message }}
+          artifacts: |
+            target/debian/*.deb
+          token: ${{ secrets.GITHUB_TOKEN }}
+          allowUpdates: true

Cargo.lock

@@ -252,7 +252,7 @@ dependencies = [
 
 [[package]]
 name = "ecb-rates"
-version = "0.1.0"
+version = "1.0.0"
 dependencies = [
  "anyhow",
  "chrono",

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "ecb-rates"
 description = "Query exchange rates from the European Central Bank (ECB)"
-version = "0.1.0"
+version = "1.0.0"
 edition = "2021"
 authors = ["Love Billenius <lovebillenius@disroot.org>"]
 license-file = "LICENSE"

README.md

@@ -1,45 +1,85 @@
 # ECB Rates
 
-A cli utility to fetch the currency rates against the Euro from the ECB.
+<p style="text-align: center">
+  <img
+    src="images/Logo_European_Central_Bank.svg"
+    width="200"
+    alt="European Central Bank Logo"
+    align="left"
+  />
+  A CLI utility to fetch exchange reates from the European Central Bank.
+  <br />
+  <br />
+  <br />
+  <br />
+  <br />
+  <br />
+  <br />
+</p>
 
 ## Install
 
 First, make sure that you have the rust toolchain installed. If not, then go to [rustup](https://rustup.rs) to install it.
 
-Now, Git clone the project, then cd into the projects root-dir. Thereafter run:
+Now, run the following cargo command:
 
 ```sh
-cargo install --path .
+cargo install --git https://github.com/lov3b/ecb-rates.git
 ```
 
 Congratulations! Now the cli binary `ecb-rates` will be in your cargo bin folder.
 
 ## Features
 
-- Fetch and display select currencies:
+#### Fetch as many days as you want
-  - as an ASCII table
-  - in JSON prettified
-  - in JSON minified
-- Fetch in different "resolutions":
-  - Last available day.
-  - Since the dawn of the *EUR*
-    - in day resolution
-    - in 90 day resolution
 
-### Example
+It will fetch any of the following api nodes, and reduce them for you.
 
-```sh
+- Last available day.
-ecb-rates -c sek -c nok -c usd
+- Last 90 days
-```
+- Since the dawn of the *EUR*
 
-```plain
+#### Display select currencies
-     2025-01-07
+
-Currency         Rate
+- as an ASCII table
----------------------
+- in JSON prettified
-USD            1.0393
+- in JSON minified
-SEK            11.475
+
-NOK           11.7385
+#### Cache
-```
+
+It features an extensive cache, which will [calculate hollidays](src/holiday.rs) in order to know whether to invalidate it or not.
+
+#### Show the rates in your way
+
+Change the rates for the perspective of any currency with the `--perspective` or `-p` flag.
+
+Flip it from `EUR to ALL` to `ALL to EUR` with the `--invert` or `-i` flag. It will work as expected with the *perspective* option.
+
+#### Fast
+
+It wouldn't be a rust project without being *BLAZINGLY FAST*! When the cache is valid a single day will on my computer be shown in 3 ms. When the cache isn't being used it will be ~90ms. The cache speed will largely depend on your drive, the latter will depend on your network speed. Both options are fast enought to be in a `.bashrc` or `.zshrc`
+
+### Examples
+
+#### Show the original data from ECB
+
+![eur-to-all](images/eur-to-all.png)
+
+#### ...with only select currencies
+
+![eur-to-all](images/eur-to-all-select.png)
+
+#### Put the exchange rate in the perspective of any currency
+
+![usd-to-all](images/usd-to-all.png)
+
+#### Flip it
+
+![all-to-usd](images/all-to-usd.png)
+
+#### Show multiple days
+
+![eur-to-all-multiple-days](images/eur-to-all-multiple-days.png)
 
 ## Acknowledgment
 

images/Logo_European_Central_Bank.svg

@@ -0,0 +1,154 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:i="http://ns.adobe.com/AdobeIllustrator/10.0/"
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="398.5"
+   height="329.42899"
+   id="svg2362"
+   sodipodi:version="0.32"
+   inkscape:version="0.92.1 r15371"
+   version="1.0"
+   sodipodi:docname="Logo_European_Central_Bank.svg"
+   inkscape:output_extension="org.inkscape.output.svg.inkscape">
+  <defs
+     id="defs3" />
+  <sodipodi:namedview
+     inkscape:document-units="mm"
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.70710678"
+     inkscape:cx="-3.3417132"
+     inkscape:cy="39.599076"
+     inkscape:current-layer="layer1"
+     inkscape:window-width="1600"
+     inkscape:window-height="837"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     showgrid="false"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata4">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-150.75,-367.64768)">
+    <g
+       id="g2384">
+      <path
+         i:knockout="Off"
+         d="M 496.009,494.23968 C 496.071,495.97068 496.267,497.65768 496.267,499.40768 C 496.267,579.87268 430.849,645.29868 350.388,645.29868 C 269.915,645.29868 204.476,579.87268 204.476,499.40768 C 204.476,497.65768 204.679,495.97068 204.742,494.23968 L 150.75,494.23968 L 150.75,697.07668 L 549.25,697.07668 L 549.25,494.23968 L 496.009,494.23968"
+         id="path13"
+         style="fill:#003399;fill-opacity:1" />
+      <path
+         i:knockout="Off"
+         d="M 218.624,499.40768 C 218.624,426.74068 277.712,367.64768 350.388,367.64768 C 423.056,367.64768 482.14,426.74068 482.14,499.40768 C 482.14,572.07468 423.056,631.15868 350.388,631.15868 C 277.712,631.15868 218.624,572.07468 218.624,499.40768"
+         id="path15"
+         style="fill:#003399;fill-opacity:1" />
+      <polygon
+         i:knockout="Off"
+         points="893.164,12.178 890.506,20.424 881.746,20.424 888.885,25.756 886.117,34.219 893.164,29.002 900.223,34.219 897.48,25.756 904.553,20.424 895.758,20.424 893.164,12.178 "
+         id="polygon17"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="839.947,26.717 837.285,34.972 828.518,34.972 835.674,40.304 832.889,48.766 839.947,43.55 847.002,48.766 844.242,40.304 851.346,34.972 842.537,34.972 839.947,26.717 "
+         id="polygon19"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="800.373,64.744 797.717,72.99 788.949,72.99 796.092,78.322 793.32,86.785 800.373,81.577 807.42,86.785 804.674,78.322 811.764,72.99 802.969,72.99 800.373,64.744 "
+         id="polygon21"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="784.711,120.441 782.053,128.696 773.285,128.687 780.432,134.027 777.656,142.49 784.711,137.273 791.77,142.49 789.02,134.027 796.1,128.696 787.305,128.696 784.711,120.441 "
+         id="polygon23"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="801.535,172.971 798.877,181.217 790.117,181.217 797.266,186.558 794.48,195.012 801.535,189.804 808.594,195.012 805.844,186.558 812.938,181.217 804.139,181.217 801.535,172.971 "
+         id="polygon25"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="837.967,211.207 835.311,219.453 826.541,219.453 833.686,224.784 830.904,233.247 837.967,228.04 845.014,233.247 842.275,224.784 849.357,219.453 840.562,219.453 837.967,211.207 "
+         id="polygon27"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="892.584,229.292 889.936,237.539 881.166,237.539 888.314,242.879 885.537,251.342 892.584,246.125 899.65,251.342 896.9,242.879 903.986,237.539 895.188,237.539 892.584,229.292 "
+         id="polygon29"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="947.262,211.517 944.613,219.763 935.854,219.763 942.984,225.103 940.221,233.566 947.262,228.349 954.33,233.566 951.584,225.103 958.66,219.763 949.857,219.763 947.262,211.517 "
+         id="polygon31"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="983.902,173.48 981.246,181.722 972.486,181.722 979.633,187.067 976.854,195.525 983.902,190.313 990.953,195.525 988.217,187.067 995.293,181.722 986.498,181.722 983.902,173.48 "
+         id="polygon33"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="1001.059,121.021 998.402,129.267 989.625,129.267 996.781,134.607 994,143.062 1001.059,137.854 1008.1,143.062 1005.363,134.607 1012.449,129.267 1003.645,129.267 1001.059,121.021 "
+         id="polygon35"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="985.684,65.262 983.018,73.517 974.258,73.517 981.404,78.849 978.623,87.312 985.684,82.095 992.732,87.312 989.988,78.849 997.072,73.517 988.277,73.517 985.684,65.262 "
+         id="polygon37"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <polygon
+         i:knockout="Off"
+         points="946.322,27.018 943.666,35.259 934.896,35.259 942.035,40.6 939.256,49.054 946.322,43.851 953.363,49.054 950.619,40.6 957.713,35.259 948.908,35.259 946.322,27.018 "
+         id="polygon39"
+         style="fill:#ffcc00;fill-opacity:1"
+         transform="translate(-542.487,367.64768)" />
+      <path
+         i:knockout="Off"
+         clip-rule="evenodd"
+         d="M 357.036,558.23968 C 333.548,558.23968 313.673,540.80068 306.972,516.75868 L 379.452,516.75868 L 384.456,504.87768 L 304.823,504.87768 C 304.651,502.92868 304.55,500.93168 304.55,498.93468 C 304.55,496.92468 304.652,494.94468 304.823,492.98768 L 389.452,492.98768 L 394.456,481.10668 L 306.972,481.10668 C 313.673,457.06468 333.548,439.63368 357.036,439.63368 C 373.173,439.63368 390.647,447.84868 403.003,460.77968 L 407.696,449.58868 C 393.684,436.06868 374.917,427.65868 357.036,427.65868 C 327.647,427.65868 302.956,450.36768 295.954,481.10568 L 279.511,481.10568 L 274.511,492.98668 L 294.183,492.98668 C 294.029,494.95268 293.966,496.93268 293.966,498.93368 C 293.966,500.93168 294.028,502.91968 294.183,504.87668 L 279.454,504.87668 L 274.458,516.75768 L 295.954,516.75768 C 302.956,547.50468 327.647,570.20468 357.036,570.20468 C 372.995,570.20468 389.647,563.49968 403.02,552.45468 L 403.02,537.13668 L 403.002,537.08768 C 390.648,550.01668 373.173,558.23968 357.036,558.23968"
+         id="path41"
+         style="fill:#ffec00;fill-rule:evenodd" />
+      <path
+         i:knockout="Off"
+         d="M 357.036,558.23968 C 333.548,558.23968 313.673,540.80068 306.972,516.75868 L 379.452,516.75868 L 384.456,504.87768 L 304.823,504.87768 C 304.651,502.92868 304.55,500.93168 304.55,498.93468 C 304.55,496.92468 304.652,494.94468 304.823,492.98768 L 389.452,492.98768 L 394.456,481.10668 L 306.972,481.10668 C 313.673,457.06468 333.548,439.63368 357.036,439.63368 C 373.173,439.63368 390.647,447.84868 403.003,460.77968 L 407.696,449.58868 C 393.684,436.06868 374.917,427.65868 357.036,427.65868 C 327.647,427.65868 302.956,450.36768 295.954,481.10568 L 279.511,481.10568 L 274.511,492.98668 L 294.183,492.98668 C 294.029,494.95268 293.966,496.93268 293.966,498.93368 C 293.966,500.93168 294.028,502.91968 294.183,504.87668 L 279.454,504.87668 L 274.458,516.75768 L 295.954,516.75768 C 302.956,547.50468 327.647,570.20468 357.036,570.20468 C 372.995,570.20468 389.647,563.49968 403.02,552.45468 L 403.02,537.13668 L 403.002,537.08768 C 390.648,550.01668 373.173,558.23968 357.036,558.23968 z "
+         id="path43"
+         style="fill:#ffcc00;stroke:#ffec00;stroke-width:0.1;fill-opacity:1" />
+    </g>
+  </g>
+</svg>

src/cache/cache.rs

@@ -1,26 +1,19 @@
 use std::fs;
 use std::io::{BufReader, BufWriter};
-use std::path::Path;
+use std::path::{Path, PathBuf};
-
-use anyhow::Context;
-use serde::{Deserialize, Serialize};
-
-use crate::cli::Resolution;
-use crate::os::Os;
 
 use super::CacheLine;
+use crate::os::Os;
+use crate::View;
 
-const FILE_NAME: &'static str = "cache.json";
+#[derive(Debug)]
-
-#[derive(Serialize, Deserialize, Debug)]
 pub struct Cache {
-    day: Option<CacheLine>,
+    cache_line: Option<CacheLine>,
-    hist_90: Option<CacheLine>,
+    config_path: PathBuf,
-    hist_day: Option<CacheLine>,
 }
 
 impl Cache {
-    pub fn load() -> Option<Self> {
+    pub fn load(view: &View) -> Option<Self> {
         let config_opt = Os::get_current()?.get_config_path();
         let mut config_path = match config_opt {
             Ok(k) => k,
@@ -33,17 +26,19 @@ impl Cache {
             eprintln!("Failed to create config dir: {:?}", e);
             return None;
         }
-        config_path.push(FILE_NAME);
+        config_path.push(format!("{}.json", view.get_name()));
         if !config_path.try_exists().unwrap_or_default() {
             return Some(Self {
-                day: None,
+                cache_line: None,
-                hist_90: None,
+                config_path,
-                hist_day: None,
             });
         }
 
         match Self::read_config(&config_path) {
-            Ok(k) => Some(k),
+            Ok(cache_line) => Some(Self {
+                cache_line: Some(cache_line),
+                config_path,
+            }),
             Err(e) => {
                 eprintln!("Config path is invalid, or cannot be created: {:?}", e);
                 None
@@ -51,44 +46,28 @@ impl Cache {
         }
     }
 
-    pub fn get_cache_line(&self, resolution: Resolution) -> Option<&CacheLine> {
+    pub fn get_cache_line(&self) -> Option<&CacheLine> {
-        match resolution {
+        self.cache_line.as_ref()
-            Resolution::TODAY => self.day.as_ref(),
-            Resolution::HistDays90 => self.hist_90.as_ref(),
-            Resolution::HistDaysAll => self.hist_day.as_ref(),
-        }
     }
 
-    pub fn set_cache_line(&mut self, resolution: Resolution, cache_line: CacheLine) {
+    pub fn set_cache_line(&mut self, cache_line: CacheLine) {
-        let cache_line_opt = Some(cache_line);
+        self.cache_line = Some(cache_line);
-        match resolution {
-            Resolution::TODAY => self.day = cache_line_opt,
-            Resolution::HistDays90 => self.hist_90 = cache_line_opt,
-            Resolution::HistDaysAll => self.hist_day = cache_line_opt,
-        }
     }
 
     pub fn save(&self) -> anyhow::Result<()> {
-        let mut config_path = Os::get_current()
-            .context("Failed to get config home")?
-            .get_config_path()?;
-        fs::create_dir_all(&config_path)?;
-
-        config_path.push(FILE_NAME);
-
         let file = fs::File::options()
             .write(true)
             .create(true)
             .truncate(true)
-            .open(&config_path)?;
+            .open(&self.config_path)?;
 
         let writer = BufWriter::new(file);
-        serde_json::to_writer(writer, self)?;
+        serde_json::to_writer(writer, &self.cache_line)?;
 
         Ok(())
     }
 
-    fn read_config(path: &Path) -> anyhow::Result<Self> {
+    fn read_config(path: &Path) -> anyhow::Result<CacheLine> {
         let file = fs::File::open(path)?;
         let reader = BufReader::new(file);
         Ok(serde_json::from_reader(reader)?)

src/cli/cli_t.rs

@@ -1,6 +1,6 @@
 use clap::{arg, Parser, ValueEnum};
 
-use crate::ecb_url;
+use super::{ShowDays, SortBy};
 
 #[derive(Debug, Parser)]
 #[command(author, version, about)]
@@ -30,7 +30,7 @@ pub struct Cli {
     pub force_color: bool,
 
     /// Sort by the currency name (in alphabetical order), or by the rate value (low -> high)
-    #[arg(value_enum, long = "sort-by", short = 's', default_value_t = SortBy::Currency)]
+    #[arg(value_enum, long = "sort-by", default_value_t = SortBy::Currency)]
     pub sort_by: SortBy,
 
     /// Recalculate to the perspective from an included currency
@@ -46,42 +46,8 @@ pub struct Cli {
     pub max_decimals: u8,
 
     /// Amount of data
-    #[arg(value_enum, default_value_t = Resolution::TODAY, long="resolution", short='r')]
+    #[arg(default_value_t = ShowDays::Days(1), long="show-days", short='s')]
-    pub resolution: Resolution,
+    pub show_days: ShowDays,
-}
-
-#[derive(Debug, Clone, Copy, ValueEnum)]
-pub enum SortBy {
-    Currency,
-    Rate,
-}
-
-#[derive(Debug, Clone, Copy, ValueEnum)]
-pub enum Resolution {
-    TODAY,
-    #[clap(name = "hist-90-days")]
-    HistDays90,
-    #[clap(name = "hist-all-days")]
-    HistDaysAll,
-}
-
-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::HistDaysAll => ecb_url::hist::DAYS_ALL,
-        }
-    }
-}
-
-impl SortBy {
-    pub fn get_comparer(&self) -> fn(&(&str, f64), &(&str, f64)) -> std::cmp::Ordering {
-        match self {
-            Self::Currency => |a, b| a.0.cmp(&b.0),
-            Self::Rate => |a, b| a.1.total_cmp(&b.1),
-        }
-    }
 }
 
 #[derive(Debug, Clone, Copy, ValueEnum)]

src/cli/mod.rs

@@ -0,0 +1,7 @@
+mod cli_t;
+mod since;
+mod sort_by;
+
+pub use cli_t::{Cli, FormatOption};
+pub use since::ShowDays;
+pub use sort_by::SortBy;

src/cli/since.rs

@@ -0,0 +1,54 @@
+use crate::View;
+use std::{fmt, str::FromStr};
+
+#[derive(Debug, Clone, Copy)]
+pub enum ShowDays {
+    Days(usize),
+    All,
+}
+
+impl FromStr for ShowDays {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.eq_ignore_ascii_case("all") {
+            return Ok(ShowDays::All);
+        }
+        s.parse::<usize>().map(ShowDays::Days).map_err(|_| {
+            format!(
+                "Invalid value for since: '{}'. Use a positive integer or 'start'.",
+                s
+            )
+        })
+    }
+}
+impl fmt::Display for ShowDays {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            ShowDays::Days(days) => write!(f, "{}", days),
+            ShowDays::All => write!(f, "all"),
+        }
+    }
+}
+
+impl ShowDays {
+    /// None represents infinity
+    pub fn to_option(&self) -> Option<usize> {
+        match self {
+            ShowDays::Days(d) => Some(*d),
+            ShowDays::All => None,
+        }
+    }
+
+    pub fn to_view(&self) -> Option<View> {
+        match self {
+            ShowDays::Days(d) => match d {
+                0 => None,
+                1 => Some(View::TODAY),
+                2..=90 => Some(View::HistDays90),
+                91.. => Some(View::HistDaysAll),
+            },
+            ShowDays::All => Some(View::HistDaysAll),
+        }
+    }
+}

src/cli/sort_by.rs

@@ -0,0 +1,16 @@
+use clap::ValueEnum;
+
+#[derive(Debug, ValueEnum, Clone)]
+pub enum SortBy {
+    Currency,
+    Rate,
+}
+
+impl SortBy {
+    pub fn get_comparer(&self) -> fn(&(&str, f64), &(&str, f64)) -> std::cmp::Ordering {
+        match self {
+            Self::Currency => |a, b| a.0.cmp(&b.0),
+            Self::Rate => |a, b| a.1.total_cmp(&b.1),
+        }
+    }
+}

src/lib.rs

@@ -7,9 +7,11 @@ pub mod os;
 pub mod parsing;
 pub mod table;
 pub mod utils_calc;
+mod view;
 
 pub use header_description::HeaderDescription;
 pub use holiday::Hollidays;
+pub use view::View;
 
 const APP_NAME: &'static str = "ECB-rates";
 const DEFAULT_WIDTH: usize = 20;

src/main.rs

@@ -25,25 +25,29 @@ async fn main() -> ExitCode {
 
     let mut header_description = HeaderDescription::new();
     let use_cache = !cli.no_cache;
-    let mut cache = if use_cache { Cache::load() } else { None };
+    let view = match cli.show_days.to_view() {
+        Some(v) => v,
+        None => {
+            eprintln!("It doesn't make any sence to fetch 0 days right?");
+            return ExitCode::SUCCESS;
+        }
+    };
+    let mut cache = if use_cache { Cache::load(&view) } else { None };
     let cache_ok = cache.as_ref().map_or_else(
         || false,
-        |c| {
+        |c| c.get_cache_line().map_or_else(|| false, |cl| cl.is_valid()),
-            c.get_cache_line(cli.resolution)
-                .map_or_else(|| false, |cl| cl.is_valid())
-        },
     );
     let mut parsed = if cache_ok {
         // These are safe unwraps
         cache
             .as_ref()
             .unwrap()
-            .get_cache_line(cli.resolution)
+            .get_cache_line()
             .unwrap()
             .exchange_rate_results
             .clone()
     } else {
-        let parsed = match get_and_parse(cli.resolution.to_ecb_url()).await {
+        let parsed = match get_and_parse(view.to_ecb_url()).await {
             Ok(k) => k,
             Err(e) => {
                 eprintln!("Failed to get/parse data from ECB: {}", e);
@@ -56,7 +60,7 @@ async fn main() -> ExitCode {
                 || true,
                 |cache_local| {
                     cache_local
-                        .get_cache_line(cli.resolution)
+                        .get_cache_line()
                         .map_or_else(|| true, |cache_line| cache_line == &parsed)
                 },
             );
@@ -64,7 +68,7 @@ async fn main() -> ExitCode {
             if not_equal_cache {
                 if let Some(cache_safe) = cache.as_mut() {
                     let cache_line = CacheLine::new(parsed.clone());
-                    cache_safe.set_cache_line(cli.resolution, cache_line);
+                    cache_safe.set_cache_line(cache_line);
                     if let Err(e) = cache_safe.save() {
                         eprintln!("Failed to save to cache with: {:?}", e);
                     }
@@ -101,6 +105,18 @@ async fn main() -> ExitCode {
         filter_currencies(&mut parsed, &currencies);
     }
 
+    parsed.reverse();
+    let parsed = match cli.show_days.to_option() {
+        Some(n) => {
+            if parsed.len() <= n {
+                parsed.as_slice()
+            } else {
+                &parsed[0..n]
+            }
+        }
+        None => parsed.as_slice(),
+    };
+
     let output = match cli.command {
         FormatOption::Json => {
             let mut json_values = parsed

src/view.rs

@@ -0,0 +1,25 @@
+use crate::ecb_url;
+
+pub enum View {
+    TODAY,
+    HistDays90,
+    HistDaysAll,
+}
+
+impl View {
+    pub fn to_ecb_url(&self) -> &'static str {
+        match self {
+            Self::TODAY => ecb_url::TODAY,
+            Self::HistDays90 => ecb_url::hist::DAYS_90,
+            Self::HistDaysAll => ecb_url::hist::DAYS_ALL,
+        }
+    }
+
+    pub fn get_name(&self) -> &'static str {
+        match self {
+            Self::TODAY => "today",
+            Self::HistDays90 => "last-90-days",
+            Self::HistDaysAll => "all-days",
+        }
+    }
+}