file read, json parse

.idea/ArduinoHABridge.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="EMPTY_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/ArduinoHABridge.iml" filepath="$PROJECT_DIR$/.idea/ArduinoHABridge.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="VcsDirectoryMappings" defaultProject="true" />
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
 </project>

Cargo.lock

@@ -5,3 +5,12 @@ version = 4
 [[package]]
 name = "ArduinoHABridge"
 version = "0.1.0"
+dependencies = [
+ "json",
+]
+
+[[package]]
+name = "json"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "078e285eafdfb6c4b434e0d31e8cfcb5115b651496faca5749b88fafd4f23bfd"

Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+json = "0.12.4"

src/main.rs

@@ -1,3 +1,46 @@
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::{ErrorKind, Read};
+use std::path::Path;
+use std::process::exit;
+
 fn main() {
-    println!("Hello, world!");
+    let data_file = Path::new("data.json");
+    get_json(data_file);
+    
 }
+
+fn get_json(path: &Path) -> HashMap<String, String> {
+    let mut data = HashMap::new();
+    let json_data = read_file(path);
+    
+    // fixme
+    let parsed_data = json::parse(json_data.as_str()).unwrap();
+    println!("{}", parsed_data);
+    
+    data
+}
+
+fn read_file(path: &Path) -> String {
+    let read_result = File::open(path);
+    let mut result= String::new();
+    
+    match read_result {
+        Ok(mut t) => {
+            // file exists
+            println!("[INFO] JSON file located, reading ...");
+            match t.read_to_string(&mut result) { 
+                // handling the reading
+                Ok(_r) => result,
+                Err(e) => panic!("[ERROR] While reading the file: {e}"),
+            }
+        },
+        Err(err) => match err.kind() {
+            ErrorKind::NotFound => {
+                println!("[ERROR] {} does not exist", path.display());
+                exit(1);
+            },
+            _ => panic!("[ERROR] Unexpected error, closing ..."),
+        }
+    }
+}