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Implement get/set functionality for database

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This commit is contained in:
Anton Tarasenko 2020-11-21 23:53:03 +07:00
parent 185f7ced8d
commit 1572d7fb5a
3 changed files with 385 additions and 64 deletions
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285
src/database/mod.rs
View File

@ -1,52 +1,48 @@
#[cfg(test)]
mod tests;
use log::warn;
use serde_json;
use serde_json::json;
use std::collections::HashMap;
use std::error::Error;
use std::fs;
use std::fmt;
use std::fs;
use std::path;
extern crate custom_error;
use custom_error::custom_error;
custom_error! {DatabaseError
const JSON_POINTER_SEPARATOR: &str = "/";
custom_error! {DBError
NotDirectory{path: String} = "Path to database should point at the directory: {path}",
NoFile{group_name: String, file_name: String} = r#"There is no "{file_name}" file in group "{group_name}"."#,
IncorrectPointer{pointer: String} = "Incorrect pointer is specified: {pointer}.",
}
struct File {
name: String,
contents: serde_json::Value,
enum ValueReference<'a> {
Object(&'a mut serde_json::Map<String, serde_json::Value>, String),
Array(&'a mut Vec<serde_json::Value>, usize),
}
struct Group {
name: String,
files: Vec<File>,
}
type FileID<'a> = (&'a str, &'a str);
struct Category {
pub struct Group {
name: String,
groups: Vec<Group>,
files: HashMap<String, serde_json::Value>,
}
pub struct Database {
storage: path::PathBuf,
contents: Vec<Category>,
storage_path: path::PathBuf,
groups: Vec<Group>,
}
impl fmt::Display for Group {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, " ({})", self.name)?;
for file in self.files.iter() {
writeln!(f, r#" File "{}": {}"#, file.name, file.contents.to_string())?;
}
Ok(())
}
}
impl fmt::Display for Category {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "[{}]", self.name)?;
for g in self.groups.iter() {
write!(f, "{}", g)?;
for (name, contents) in self.files.iter() {
writeln!(f, r#" File "{}": {}"#, name, contents.to_string())?;
}
Ok(())
}
@ -54,45 +50,23 @@ impl fmt::Display for Category {
impl fmt::Display for Database {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "DB: {}", self.storage.display())?;
for c in self.contents.iter() {
writeln!(f, "{}", c)?;
writeln!(f, "DB: {}", self.storage_path.display())?;
for g in self.groups.iter() {
writeln!(f, "{}", g)?;
}
Ok(())
}
}
impl Database {
pub fn new(storage: &path::Path) -> Result<Database, Box<dyn Error>> {
if !storage.is_dir() {
return Err(Box::new(DatabaseError::NotDirectory {
path: storage.display().to_string(),
pub fn new(storage_path: &path::Path) -> Result<Database, Box<dyn Error>> {
if !storage_path.is_dir() {
return Err(Box::new(DBError::NotDirectory {
path: storage_path.display().to_string(),
}));
}
let mut contents = Vec::new();
for entry in fs::read_dir(storage)? {
let entry = entry?;
let path = entry.path();
if !path.is_dir() {
warn!(
r#"File {} found where only category directories are supposed to be"#,
path.display()
);
} else {
let category = load_category(&path)?;
contents.push(category);
}
}
Ok(Database {
storage: storage.to_path_buf(),
contents,
})
}
}
fn load_category(category_path: &path::Path) -> Result<Category, Box<dyn Error>> {
let mut groups = Vec::new();
for entry in fs::read_dir(category_path)? {
for entry in fs::read_dir(storage_path)? {
let entry = entry?;
let path = entry.path();
if !path.is_dir() {
@ -105,14 +79,124 @@ fn load_category(category_path: &path::Path) -> Result<Category, Box<dyn Error>>
groups.push(group);
}
}
Ok(Category {
name: get_file_name(category_path),
Ok(Database {
storage_path: storage_path.to_path_buf(),
groups,
})
}
pub fn group_names(&self) -> Vec<String> {
self.groups.iter().map(|x| x.name.clone()).collect()
}
pub fn file_names_in(&self, group_name: &str) -> Vec<String> {
match self.groups.iter().find(|x| x.name.eq(group_name)) {
Some(group) => group.files.keys().map(|x| x.clone()).collect(),
None => Vec::new(),
}
}
fn group_index(&self, group_name: &str) -> Option<usize> {
self.groups.iter().position(|x| x.name.eq(group_name))
}
fn as_json_mut(&mut self, (group_name, file_name): FileID) -> Option<&mut serde_json::Value> {
match self.group_index(group_name) {
Some(index) => self.groups[index].files.get_mut(&file_name.to_owned()),
_ => None,
}
}
pub fn as_json(&self, (group_name, file_name): FileID) -> Option<&serde_json::Value> {
match self.group_index(group_name) {
Some(index) => self.groups[index].files.get(&file_name.to_owned()),
_ => None,
}
}
pub fn as_string(&self, file_id: FileID) -> Option<String> {
self.as_json(file_id).map(|x| x.to_string())
}
pub fn get_json(&self, file_id: FileID, pointer: &str) -> Option<&serde_json::Value> {
match self.as_json(file_id) {
Some(v) => v.pointer(pointer),
_ => None,
}
}
pub fn get_string(&self, file_id: FileID, pointer: &str) -> Option<String> {
self.get_json(file_id, pointer).map(|x| x.to_string())
}
pub fn contains(&self, file_id: FileID, pointer: &str) -> bool {
self.get_json(file_id, pointer) != None
}
pub fn set_json(
&mut self,
(group_name, file_name): FileID,
pointer: &str,
new_value: serde_json::Value,
) -> Result<(), Box<dyn Error>> {
let file_json = match self.as_json_mut((group_name, file_name)) {
Some(file_json) => file_json,
_ => {
return Err(Box::new(DBError::NoFile {
group_name: group_name.to_owned(),
file_name: file_name.to_owned(),
}))
}
};
touch(file_json, pointer)?;
match file_json.pointer_mut(pointer) {
Some(v) => *v = new_value,
_ => {
// If after `touch()` call we still don't have an existing value -
// something is wrong with the `pointer`
return Err(Box::new(DBError::IncorrectPointer {
pointer: pointer.to_owned(),
}));
}
};
Ok(())
}
pub fn remove(
&mut self,
(group_name, file_name): FileID,
pointer: &str,
) -> Result<(), Box<dyn Error>> {
let file_json = match self.as_json_mut((group_name, file_name)) {
Some(file_json) => file_json,
_ => {
return Err(Box::new(DBError::NoFile {
group_name: group_name.to_owned(),
file_name: file_name.to_owned(),
}))
}
};
match pointer_to_reference(file_json, pointer) {
Some(ValueReference::Object(map, variable_name)) => {
map.remove(&variable_name);
}
Some(ValueReference::Array(vec, variable_index)) => {
if variable_index < vec.len() {
vec.remove(variable_index);
}
}
_ => {
return Err(Box::new(DBError::IncorrectPointer {
pointer: pointer.to_owned(),
}))
}
};
Ok(())
}
}
fn load_group(group_path: &path::Path) -> Result<Group, Box<dyn Error>> {
let mut files = Vec::new();
let mut files = HashMap::new();
for entry in fs::read_dir(group_path)? {
let entry = entry?;
let path = entry.path();
@ -123,10 +207,9 @@ fn load_group(group_path: &path::Path) -> Result<Group, Box<dyn Error>> {
);
} else {
let file_contents = fs::read_to_string(&path)?;
files.push(File {
name: get_file_name(path.as_path()),
contents: serde_json::from_str(&file_contents)?,
});
let file_name = get_file_name(path.as_path());
let file_contents = serde_json::from_str(&file_contents)?;
files.insert(file_name, file_contents);
}
}
Ok(Group {
@ -135,9 +218,87 @@ fn load_group(group_path: &path::Path) -> Result<Group, Box<dyn Error>> {
})
}
fn touch(json_root: &mut serde_json::Value, pointer: &str) -> (Result<(), Box<dyn Error>>) {
if pointer.is_empty() || json_root.pointer_mut(pointer).is_some() {
return Ok(());
}
match pointer_to_reference(json_root, pointer) {
Some(ValueReference::Object(map, variable_name)) => {
map.insert(variable_name, json!(null));
}
Some(ValueReference::Array(vec, variable_index)) => {
// Since values at the index does not exist - resize will increase the sizeof the array
vec.resize(variable_index + 1, json!(null));
}
_ => {
return Err(Box::new(DBError::IncorrectPointer {
pointer: pointer.to_owned(),
}))
}
};
Ok(())
}
fn pointer_to_reference<'a>(
json_root: &'a mut serde_json::Value,
pointer: &str,
) -> Option<ValueReference<'a>> {
if pointer.is_empty() {
return None;
}
let container_variable_pair =
pop_json_pointer(pointer).and_then(move |(path, variable_name)| {
match json_root.pointer_mut(&path) {
Some(v) => Some((v, variable_name)),
_ => None,
}
});
let (json_container, variable_name) = match container_variable_pair {
Some(v) => v,
_ => return None,
};
match json_container {
serde_json::Value::Object(map) => Some(ValueReference::Object(map, variable_name)),
serde_json::Value::Array(vec) => {
let index: usize = match variable_name.parse() {
Ok(v) => v,
_ => return None,
};
Some(ValueReference::Array(vec, index))
}
_ => None,
}
}
fn pop_json_pointer(pointer: &str) -> Option<(String, String)> {
let mut pointer = pointer.to_string();
let last_separator_index = match pointer.rfind(JSON_POINTER_SEPARATOR) {
Some(v) => v,
_ => {
return None;
}
};
if last_separator_index >= pointer.len() {
pointer.pop();
return Some((pointer, String::new()));
}
let var_name = pointer.split_off(last_separator_index + 1);
pointer.pop();
Some((pointer, var_name))
}
fn get_file_name(path: &path::Path) -> String {
path.file_stem()
.and_then(|x| x.to_str())
.unwrap_or_default()
.to_string()
}
// TODO add tests for remove
// TODO add tests for panics (both add and remove)
// TODO add file addition/removal
// TODO add db saving
// TODO make sure file's main value not being an object won't break anything
// TODO check that file name is appropriate
// TODO handle parsing errors differently
// TODO add logs

160
src/database/tests.rs Normal file
View File

@ -0,0 +1,160 @@
use super::*;
use serde_json::json;
use std::path;
const TEST_DB_PATH: &str = "./fixtures/database";
const NO_DB_MESSAGE: &str = "Can not find/load test database";
#[test]
fn group_names() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let names = db.group_names();
assert!(names.contains(&"administration".to_owned()));
assert!(names.contains(&"game".to_owned()));
assert_eq!(names.len(), 2);
}
#[test]
fn file_names() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let names_admin = db.file_names_in("administration");
let names_game = db.file_names_in("game");
assert!(names_admin.contains(&"registered".to_owned()));
assert!(names_game.contains(&"general".to_owned()));
assert!(names_game.contains(&"perks".to_owned()));
assert_eq!(names_admin.len(), 1);
assert_eq!(names_game.len(), 2);
}
#[test]
fn db_json_contents() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let registered = db.as_json(("administration", "registered")).unwrap();
let user_map = registered
.as_object()
.expect("Read value is not an object.");
assert_eq!(user_map.len(), 2);
assert!(user_map.contains_key("76561198025127722"));
let user_record = user_map
.get("76561198044316328")
.unwrap()
.as_object()
.unwrap();
assert_eq!(user_record.len(), 3);
assert_eq!(user_record.get("ip_lock").unwrap().as_bool(), Some(false));
assert_eq!(
user_record.get("password_hash").unwrap().as_str(),
Some("fce798e0804dfb217f929bdba26745024f37f6b6ba7406f3775176e20dd5089d")
);
let groups_arrays = user_record.get("groups").unwrap().as_array().unwrap();
assert_eq!(groups_arrays.len(), 1);
assert_eq!(groups_arrays[0], "admin");
}
#[test]
fn db_string_contents() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let general = db.as_string(("game", "general")).unwrap();
assert!(general.contains(r#""dosh_thrown":527624"#));
assert!(general
.contains(r#""achievements":["kf:LabCleaner","kf:ChickenFarmer","scrn:playedscrn"]"#));
}
#[test]
fn db_json_sub_contents() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
// Test empty path
let file_id = ("administration", "registered");
assert_eq!(db.as_json(file_id), db.get_json(file_id, ""));
// Test complex path
let received = db
.get_json(file_id, "/76561198025127722/allowed_ips/1")
.unwrap();
assert_eq!(received.as_str().unwrap(), "192.168.0.100");
// Test bad paths
assert!(db.get_json(file_id, "/777") == None);
assert!(db.get_json(file_id, "/76561198025127722/allowed_ips/2") == None);
}
#[test]
fn db_string_sub_contents() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
// Test empty path
let file_id = ("administration", "registered");
assert_eq!(db.as_string(file_id), db.get_string(file_id, ""));
// Test complex path
let received = db
.get_string(file_id, "/76561198025127722/allowed_ips/0")
.unwrap();
assert_eq!(received, r#""127.0.0.1""#);
}
#[test]
fn db_contains_check() {
let db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let registered_id = ("administration", "registered");
let perks_id = ("game", "perks");
// These exist
assert!(db.contains(registered_id, "/76561198025127722/password_hash"));
assert!(db.contains(registered_id, "/76561198044316328/groups"));
assert!(db.contains(perks_id, "/76561198025127722/headshots"));
assert!(db.contains(perks_id, "/76561198044316328"));
// These do not exist
assert!(!db.contains(registered_id, "/76561198025127722/password/"));
assert!(!db.contains(registered_id, "/76561198044316328/groups/2"));
assert!(!db.contains(perks_id, "/76561198025127722/assault_rifle_damage/9067"));
assert!(!db.contains(perks_id, "/76561198044316328/headshots"));
}
#[test]
fn db_set_success() -> Result<(), Box<dyn Error>> {
let mut db = Database::new(path::Path::new(TEST_DB_PATH)).expect(NO_DB_MESSAGE);
let file_id = ("administration", "registered");
// Modify existing
db.set_json(file_id, "/76561198025127722/ip_lock", json!(false))?;
assert_eq!(
db.get_string(file_id, "/76561198025127722/ip_lock")
.unwrap(),
"false"
);
db.set_json(
file_id,
"/76561198044316328/password_hash",
json!({"var":13524}),
)?;
assert_eq!(
db.get_string(file_id, "/76561198044316328/password_hash")
.unwrap(),
r#"{"var":13524}"#
);
// Reset whole file
db.set_json(file_id, "", json!({}))?;
assert_eq!(db.as_json(file_id).unwrap().to_string(), "{}");
// Add new values
db.set_json(file_id, "/new_var", json!([42, {"word":"life"}, null]))?;
assert_eq!(
db.as_json(file_id).unwrap().to_string(),
r#"{"new_var":[42,{"word":"life"},null]}"#
);
Ok(())
}
#[test]
fn test_pop_json_pointer() {
assert_eq!(
pop_json_pointer("/a/b/c/d"),
Some(("/a/b/c".to_owned(), "d".to_owned()))
);
assert_eq!(pop_json_pointer("/"), Some(("".to_owned(), "".to_owned())));
assert_eq!(
pop_json_pointer("/a/b/"),
Some(("/a/b".to_owned(), "".to_owned()))
);
assert_eq!(pop_json_pointer(""), None);
// This pointer is incorrect
assert_eq!(pop_json_pointer("var"), None);
}

4
src/main.rs
View File

@ -5,8 +5,8 @@ mod database;
fn main() {
let args: Vec<String> = env::args().collect();
let filename = &args[1];
let config = database::Database::new(Path::new(filename));
match config {
let db = database::Database::new(Path::new(filename));
match db {
Ok(db) => print!("{}", db),
Err(error) => println!("OH NO: {}", error),
}