From 87d9a931a3b45fe7382f3ac3f4e3d947808a03c1 Mon Sep 17 00:00:00 2001
From: Michael <michael.lindman@gmail.com>
Date: Wed, 27 Oct 2021 02:29:00 +0100
Subject: [PATCH] first commit

Signed-off-by: Michael <michael.lindman@gmail.com>
---
 .gitignore |  1 +
 LICENSE    | 19 +++++++++++++++++++
 README.md  | 39 +++++++++++++++++++++++++++++++++++++++
 go.mod     |  5 +++++
 main.go    | 41 +++++++++++++++++++++++++++++++++++++++++
 5 files changed, 105 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 LICENSE
 create mode 100644 README.md
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c14a297
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+go.sum
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e98fac0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+MIT License Copyright (c) 2021 Michael Lindman
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2aeb3e9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,39 @@
+# Currency
+
+Simple golang currency converter using [fawazahmed0](https://github.com/fawazahmed0)'s [currency-api](https://github.com/fawazahmed0/currency-api).
+
+## Installation
+
+```sh
+go install git.0cd.xyz/michael/currency
+```
+
+## Usage
+
+```sh
+./currency gbp usd 50
+```
+
+## License
+
+```text
+MIT License Copyright (c) 2021 Michael Lindman
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+```
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..ce280c7
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module git.0cd.xyz/michael/currency
+
+go 1.17
+
+require git.0cd.xyz/michael/toolbox v0.0.0-20211024232522-b1a517857097 // indirect
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..4c3978f
--- /dev/null
+++ b/main.go
@@ -0,0 +1,41 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+
+	"git.0cd.xyz/michael/toolbox/req"
+)
+
+const url = "https://cdn.jsdelivr.net/gh/fawazahmed0/currency-api@1/latest/currencies/"
+
+func main() {
+	from, to, value := ui()
+	body, _, err := req.Get(url+from+"/"+to+".json", nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+	var result map[string]interface{}
+	if err := json.Unmarshal(body, &result); err != nil {
+		log.Fatal(err)
+	}
+	v, ok := result[to].(float64)
+	if !ok {
+		log.Fatal("invalid conversion")
+	}
+	fmt.Printf("%.2f %s\n", v*value, to)
+}
+
+func ui() (from, to string, value float64) {
+	if len(os.Args) < 4 {
+		os.Exit(1)
+	}
+	val, err := strconv.ParseFloat(os.Args[3], 64)
+	if err != nil {
+		log.Fatal(err)
+	}
+	return os.Args[1], os.Args[2], val
+}