commit
b4dbb94e27
GPG Key ID:
2C5FD5035250423D
@ -0,0 +1,2 @@ |
||||
/target |
||||
.idea/ |
||||
@ -0,0 +1,222 @@ |
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# This file is automatically @generated by Cargo. |
||||
# It is not intended for manual editing. |
||||
[[package]] |
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name = "anyhow" |
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dependencies = [ |
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] |
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|
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[[package]] |
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name = "serde_derive" |
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dependencies = [ |
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"quote", |
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"syn", |
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|
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[[package]] |
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dependencies = [ |
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"itoa", |
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"ryu", |
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"serde", |
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] |
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[[package]] |
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name = "simple-logging" |
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"log", |
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"thread-id", |
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"quote", |
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"syn", |
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"libc", |
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"redox_syscall", |
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"winapi", |
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dependencies = [ |
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"getrandom", |
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"serde", |
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] |
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[[package]] |
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[[package]] |
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name = "winapi" |
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checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419" |
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dependencies = [ |
||||
"winapi-i686-pc-windows-gnu", |
||||
"winapi-x86_64-pc-windows-gnu", |
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] |
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|
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[[package]] |
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name = "winapi-i686-pc-windows-gnu" |
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version = "0.4.0" |
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source = "registry+https://github.com/rust-lang/crates.io-index" |
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[[package]] |
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name = "winapi-x86_64-pc-windows-gnu" |
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version = "0.4.0" |
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source = "registry+https://github.com/rust-lang/crates.io-index" |
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checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" |
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|
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[[package]] |
||||
name = "yopa" |
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version = "0.1.0" |
||||
dependencies = [ |
||||
"anyhow", |
||||
"log", |
||||
"serde", |
||||
"serde_json", |
||||
"simple-logging", |
||||
"thiserror", |
||||
"uuid", |
||||
] |
||||
@ -0,0 +1,19 @@ |
||||
[package] |
||||
name = "yopa" |
||||
version = "0.1.0" |
||||
authors = ["Ondřej Hruška <ondra@ondrovo.com>"] |
||||
edition = "2018" |
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html |
||||
|
||||
[dependencies] |
||||
log = "0.4.13" |
||||
simple-logging = "2.0.2" |
||||
|
||||
uuid = { version = "0.8", features = ["serde", "v4"] } |
||||
serde_json = "1.0.61" |
||||
serde = { version = "1.0.120", features = ["derive"] } |
||||
|
||||
#parking_lot = "0.11.1" |
||||
anyhow = "1.0.38" |
||||
thiserror = "1.0.23" |
||||
@ -0,0 +1,78 @@ |
||||
#[macro_use] extern crate log; |
||||
|
||||
use log::LevelFilter; |
||||
|
||||
mod yopa; |
||||
use yopa::model; |
||||
use yopa::model::DataType; |
||||
use crate::yopa::model::TypedValue; |
||||
use anyhow::Error; |
||||
|
||||
fn main() { |
||||
simple_logging::log_to_stderr(LevelFilter::Debug); |
||||
|
||||
if let Err(e) = _main() { |
||||
error!("{:?}", e); |
||||
} |
||||
} |
||||
|
||||
fn _main() -> anyhow::Result<()> { |
||||
simple_logging::log_to_stderr(LevelFilter::Debug); |
||||
|
||||
let mut store = yopa::InMemoryStorage::new(); |
||||
|
||||
let recipe_tid = store.insert_object_template(model::ObjectTemplate { |
||||
id: Default::default(), |
||||
name: "recipe".to_string(), |
||||
parent_tpl_id: None |
||||
})?; |
||||
|
||||
store.insert_property_template(model::PropertyTemplate { |
||||
id: Default::default(), |
||||
parent_tpl_id: recipe_tid, |
||||
name: "title".to_string(), |
||||
optional: false, |
||||
multiple: false, |
||||
data_type: DataType::String, |
||||
default: None |
||||
})?; |
||||
|
||||
store.insert_property_template(model::PropertyTemplate { |
||||
id: Default::default(), |
||||
parent_tpl_id: recipe_tid, |
||||
name: "prep_hours".to_string(), |
||||
optional: true, |
||||
multiple: false, |
||||
data_type: DataType::Decimal, |
||||
default: None |
||||
})?; |
||||
|
||||
let book_tid = store.insert_object_template(model::ObjectTemplate { |
||||
id: Default::default(), |
||||
name: "book".to_string(), |
||||
parent_tpl_id: None |
||||
})?; |
||||
|
||||
let br_rid = store.insert_relation_template(model::RelationTemplate { |
||||
id: Default::default(), |
||||
object_tpl_id: recipe_tid, |
||||
name: "book reference".to_string(), |
||||
optional: false, |
||||
multiple: false, |
||||
related_tpl_id: book_tid |
||||
})?; |
||||
|
||||
store.insert_property_template(model::PropertyTemplate { |
||||
id: Default::default(), |
||||
parent_tpl_id: br_rid, |
||||
name: "page".to_string(), |
||||
optional: true, |
||||
multiple: false, |
||||
data_type: DataType::Integer, |
||||
default: None |
||||
})?; |
||||
|
||||
debug!("{:#?}", store); |
||||
|
||||
Ok(()) |
||||
} |
||||
@ -0,0 +1,299 @@ |
||||
use std::collections::{HashMap}; |
||||
use std::iter::Extend; |
||||
use crate::yopa::model::{ObjectTemplate, ID}; |
||||
use thiserror::Error; |
||||
use std::hash::Hash; |
||||
|
||||
/// Data model structs and enums
|
||||
pub mod model { |
||||
use serde::{Serialize, Deserialize}; |
||||
use std::borrow::Cow; |
||||
|
||||
/// Common identifier type
|
||||
#[allow(non_camel_case_types)] |
||||
pub type ID = uuid::Uuid; |
||||
|
||||
/// Object template
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct ObjectTemplate { |
||||
/// PK
|
||||
pub id : ID, |
||||
/// Template name, unique within the database
|
||||
pub name: String, |
||||
/// Parent object template ID
|
||||
pub parent_tpl_id: Option<ID>, |
||||
} |
||||
|
||||
/// Relation between templates
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct RelationTemplate { |
||||
/// PK
|
||||
pub id: ID, |
||||
/// Object template ID
|
||||
pub object_tpl_id: ID, |
||||
/// Relation name, unique within the parent object
|
||||
pub name: String, |
||||
/// Relation is optional
|
||||
pub optional: bool, |
||||
/// Relation can be multiple
|
||||
pub multiple: bool, |
||||
/// Related object template ID
|
||||
pub related_tpl_id: ID, |
||||
} |
||||
|
||||
/// Property definition
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct PropertyTemplate { |
||||
/// PK
|
||||
pub id: ID, |
||||
/// Object or Reference template ID
|
||||
pub parent_tpl_id: ID, |
||||
/// Property name, unique within the parent object or reference
|
||||
pub name: String, |
||||
/// Property is optional
|
||||
pub optional: bool, |
||||
/// Property can be multiple
|
||||
pub multiple: bool, |
||||
/// Property data type
|
||||
pub data_type: DataType, |
||||
/// Default value, used for newly created objects
|
||||
pub default: Option<TypedValue>, |
||||
} |
||||
|
||||
/// Value data type
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub enum DataType { |
||||
/// Text
|
||||
String, |
||||
/// Integer
|
||||
Integer, |
||||
/// Floating point number
|
||||
Decimal, |
||||
/// Boolean yes/no
|
||||
Boolean, |
||||
} |
||||
|
||||
/// Value of a particular type
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub enum TypedValue { |
||||
/// Text
|
||||
String(Cow<'static, str>), |
||||
/// Integer
|
||||
Integer(i64), |
||||
/// Floating point number
|
||||
Decimal(f64), |
||||
/// Boolean yes/no
|
||||
Boolean(bool), |
||||
} |
||||
} |
||||
|
||||
/// Data value structs
|
||||
pub mod data { |
||||
use serde::{Serialize, Deserialize}; |
||||
use crate::yopa::model::{ID, TypedValue}; |
||||
|
||||
/// Instance of an object
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct Object { |
||||
/// PK
|
||||
pub id : ID, |
||||
/// Object template ID
|
||||
pub object_tpl_id: ID, |
||||
} |
||||
|
||||
/// Relation between two objects
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct Relation { |
||||
/// PK
|
||||
pub id : ID, |
||||
/// Source object ID
|
||||
pub object_id : ID, |
||||
/// Relation template ID
|
||||
pub rel_tpl_id: ID, |
||||
/// Related object ID
|
||||
pub related_id : ID, |
||||
} |
||||
|
||||
/// Value attached to an object
|
||||
#[derive(Debug,Clone,Serialize,Deserialize)] |
||||
pub struct Value { |
||||
/// PK
|
||||
pub id : ID, |
||||
/// Owning object ID
|
||||
pub object_id : ID, |
||||
/// Property template ID
|
||||
pub prop_tpl_id: ID, |
||||
/// Property value
|
||||
pub value : TypedValue, |
||||
} |
||||
} |
||||
|
||||
#[derive(Debug, Default)] |
||||
pub struct InMemoryStorage { |
||||
tpl_objects: HashMap<ID, model::ObjectTemplate>, |
||||
tpl_relations: HashMap<ID, model::RelationTemplate>, |
||||
tpl_properties: HashMap<ID, model::PropertyTemplate>, |
||||
|
||||
data_objects: HashMap<ID, data::Object>, |
||||
data_relations: HashMap<ID, data::Relation>, |
||||
data_properties: HashMap<ID, data::Value>, |
||||
} |
||||
|
||||
fn next_id() -> ID { |
||||
uuid::Uuid::new_v4() |
||||
} |
||||
|
||||
pub fn zero_id() -> ID { |
||||
uuid::Uuid::nil() |
||||
} |
||||
|
||||
#[derive(Debug,Error)] |
||||
pub enum StorageError { |
||||
#[error("Referenced {0} does not exist")] |
||||
NotExist(&'static str), |
||||
#[error("Schema constraint violation: {0}")] |
||||
ConstraintViolation(&'static str), |
||||
} |
||||
|
||||
impl InMemoryStorage { |
||||
pub fn new() -> Self { |
||||
Self::default() |
||||
} |
||||
|
||||
pub fn insert_object_template(&mut self, mut tpl : model::ObjectTemplate) -> Result<ID, StorageError> { |
||||
if let Some(pid) = tpl.parent_tpl_id { |
||||
if !self.tpl_objects.contains_key(&pid) { |
||||
return Err(StorageError::NotExist("parent object template")); |
||||
} |
||||
} |
||||
|
||||
if self.tpl_objects.iter().find(|(_, t)| t.name == tpl.name).is_some() { |
||||
return Err(StorageError::ConstraintViolation("object template with this name already exists")); |
||||
} |
||||
|
||||
let id = next_id(); |
||||
tpl.id = id; |
||||
self.tpl_objects.insert(id, tpl); |
||||
Ok(id) |
||||
} |
||||
|
||||
pub fn insert_relation_template(&mut self, mut rel: model::RelationTemplate) -> Result<ID, StorageError> { |
||||
if !self.tpl_objects.contains_key(&rel.object_tpl_id) { |
||||
return Err(StorageError::NotExist("origin object template")); |
||||
} |
||||
if !self.tpl_objects.contains_key(&rel.related_tpl_id) { |
||||
return Err(StorageError::NotExist("related object template")); |
||||
} |
||||
|
||||
if self.tpl_relations.iter().find(|(_, t)| t.name == rel.name && t.object_tpl_id == rel.object_tpl_id).is_some() { |
||||
return Err(StorageError::ConstraintViolation("relation with this name and parent already exists")); |
||||
} |
||||
|
||||
let id = next_id(); |
||||
rel.id = id; |
||||
self.tpl_relations.insert(id, rel); |
||||
Ok(id) |
||||
} |
||||
|
||||
pub fn insert_property_template(&mut self, mut prop: model::PropertyTemplate) -> Result<ID, StorageError> { |
||||
if !self.tpl_objects.contains_key(&prop.parent_tpl_id) { |
||||
// Maybe it's attached to a relation?
|
||||
if !self.tpl_relations.contains_key(&prop.parent_tpl_id) { |
||||
return Err(StorageError::NotExist("object or reference template")); |
||||
} |
||||
} |
||||
|
||||
if self.tpl_properties.iter().find(|(_, t)| t.parent_tpl_id == prop.parent_tpl_id && t.name == prop.name).is_some() { |
||||
return Err(StorageError::ConstraintViolation("property with this name and parent already exists")); |
||||
} |
||||
|
||||
let id = next_id(); |
||||
prop.id = id; |
||||
self.tpl_properties.insert(id, prop); |
||||
Ok(id) |
||||
} |
||||
|
||||
pub fn delete_object_template(&mut self, id : ID) -> Result<ObjectTemplate, StorageError> { |
||||
return if let Some(t) = self.tpl_objects.remove(&id) { |
||||
// Remove relation templates
|
||||
let removed_relation_ids = map_drain_filter(&mut self.tpl_relations, |_k, v| v.object_tpl_id == id || v.related_tpl_id == id) |
||||
.keys(); |
||||
|
||||
// Remove related property templates
|
||||
let removed_prop_ids = map_drain_filter(&mut self.tpl_properties, |_k, v| v.parent_tpl_id == id || removed_relation_ids.contains(&v.parent_tpl_id)) |
||||
.keys(); |
||||
|
||||
// Remove objects
|
||||
let _ = map_drain_filter(&mut self.data_objects, |_k, v| v.object_tpl_id == id); |
||||
|
||||
// Remove property values
|
||||
let _ = map_drain_filter(&mut self.data_properties, |_k, v| removed_prop_ids.contains(&v.prop_tpl_id)); |
||||
|
||||
// Remove relations
|
||||
let _ = map_drain_filter(&mut self.data_relations, |_k, v| removed_relation_ids.contains(&v.rel_tpl_id)); |
||||
|
||||
// Related object remain untouched, so there can be a problem with orphans. This is up to the application to deal with.
|
||||
|
||||
Ok(t) |
||||
} else { |
||||
Err(StorageError::NotExist("object template")) |
||||
} |
||||
} |
||||
|
||||
pub fn delete_relation_template(&mut self, id : ID) -> Result<model::RelationTemplate, StorageError> { |
||||
return if let Some(t) = self.tpl_relations.remove(&id) { |
||||
// Remove relations
|
||||
let _ = map_drain_filter(&mut self.data_relations, |_k, v| v.rel_tpl_id == id).keys(); |
||||
|
||||
// Remove related property templates
|
||||
let removed_prop_tpl_ids = map_drain_filter(&mut self.tpl_properties, |_k, v| v.parent_tpl_id == id).keys(); |
||||
|
||||
let _ = map_drain_filter(&mut self.data_properties, |_k, v| removed_prop_tpl_ids.contains(&v.prop_tpl_id)); |
||||
|
||||
// Related object remain untouched, so there can be a problem with orphans. This is up to the application to deal with.
|
||||
|
||||
Ok(t) |
||||
} else { |
||||
Err(StorageError::NotExist("relation template")) |
||||
} |
||||
} |
||||
|
||||
pub fn delete_property_template(&mut self, id : ID) -> Result<model::PropertyTemplate, StorageError> { |
||||
return if let Some(t) = self.tpl_properties.remove(&id) { |
||||
// Remove relations
|
||||
let _ = map_drain_filter(&mut self.data_properties, |_k, v| v.prop_tpl_id == id); |
||||
Ok(t) |
||||
} else { |
||||
Err(StorageError::NotExist("property template")) |
||||
} |
||||
} |
||||
} |
||||
|
||||
fn map_drain_filter<K : Eq + Hash, V>(map : &mut HashMap<K, V>, filter : impl Fn(&K, &V) -> bool) -> Vec<(K, V)> { |
||||
let mut removed = vec![]; |
||||
let mut retain = vec![]; |
||||
for (k, v) in map.drain() { |
||||
if filter(&k, &v) { |
||||
removed.push((k, v)); |
||||
} else { |
||||
retain.push((k, v)); |
||||
} |
||||
} |
||||
map.extend(retain); |
||||
removed |
||||
} |
||||
|
||||
trait KVVecToKeysOrValues<K, V> { |
||||
fn keys(self) -> Vec<K>; |
||||
fn values(self) -> Vec<V>; |
||||
} |
||||
|
||||
impl<K, V> KVVecToKeysOrValues<K, V> for Vec<(K,V)> { |
||||
fn keys(self) -> Vec<K> { |
||||
self.into_iter().map(|(k, _v)| k).collect() |
||||
} |
||||
|
||||
fn values(self) -> Vec<V> { |
||||
self.into_iter().map(|(_k, v)| v).collect() |
||||
} |
||||
} |
||||
Loading…
Reference in new issue