Simple input parser

.gitignore

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+/target

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/modules.xml

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

.idea/sqlite_clone.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_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/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "sqlite_clone"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "sqlite_clone"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io;
+use std::io::Write;
+use std::process::exit;
+
+struct InputBuffer {
+    buffer: Option<String>,
+}
+
+impl InputBuffer {
+    pub fn new() -> Self {
+        return Self {
+            buffer: None
+        };
+    }
+
+    pub(crate) fn print_prompt(&mut self) -> &mut Self {
+        print!("db > ");
+        if let Err(_) = io::stdout().flush() {
+            panic!("could not print to stdout")
+        }
+        self
+    }
+
+    pub(crate) fn read_input(&mut self) -> Result<&mut Self, String> {
+        self.buffer = Some(String::new());
+        match &mut self.buffer {
+            Some(input_buffer) => {
+                if let Ok(_) = io::stdin().read_line(input_buffer) {
+                    Ok(self)
+                } else {
+                    Err(String::from("could not handle input"))
+                }
+            }
+            _ => { Err(String::from("Could not initialize buffer")) }
+        }
+    }
+
+    pub(crate) fn parse(&self) {
+        match &self.buffer {
+            Some(command) => {
+                match command.as_str().replace("\n", "").trim() {
+                    ".exit" => {
+                        exit(0);
+                    }
+                    cmd => {
+                        println!("Could not handle command: {cmd}")
+                    }
+                }
+            }
+            None => {}
+        }
+    }
+}
+
+
+fn main() -> Result<(), String> {
+    let mut input_buffer = InputBuffer::new();
+
+    loop {
+        input_buffer
+            .print_prompt()
+            .read_input()?
+            .parse()
+    }
+}