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555 lines
17 KiB
Rust
555 lines
17 KiB
Rust
use crate::{
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blogs::Blog,
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schema::{blogs, list_elems, lists, users},
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users::User,
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Connection, Error, Result,
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};
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use diesel::{self, ExpressionMethods, QueryDsl, RunQueryDsl};
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use std::convert::{TryFrom, TryInto};
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/// Represent what a list is supposed to store. Represented in database as an integer
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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pub enum ListType {
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User,
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Blog,
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Word,
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Prefix,
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}
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impl TryFrom<i32> for ListType {
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type Error = ();
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fn try_from(i: i32) -> std::result::Result<Self, ()> {
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match i {
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0 => Ok(ListType::User),
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1 => Ok(ListType::Blog),
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2 => Ok(ListType::Word),
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3 => Ok(ListType::Prefix),
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_ => Err(()),
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}
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}
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}
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impl Into<i32> for ListType {
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fn into(self) -> i32 {
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match self {
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ListType::User => 0,
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ListType::Blog => 1,
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ListType::Word => 2,
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ListType::Prefix => 3,
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}
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}
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}
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#[derive(Clone, Queryable, Identifiable)]
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pub struct List {
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pub id: i32,
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pub name: String,
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pub user_id: Option<i32>,
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type_: i32,
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}
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#[derive(Default, Insertable)]
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#[table_name = "lists"]
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struct NewList<'a> {
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pub name: &'a str,
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pub user_id: Option<i32>,
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type_: i32,
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}
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macro_rules! func {
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(@elem User $id:expr, $value:expr) => {
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NewListElem {
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list_id: $id,
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user_id: Some(*$value),
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blog_id: None,
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word: None,
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}
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};
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(@elem Blog $id:expr, $value:expr) => {
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NewListElem {
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list_id: $id,
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user_id: None,
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blog_id: Some(*$value),
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word: None,
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}
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};
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(@elem Word $id:expr, $value:expr) => {
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NewListElem {
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list_id: $id,
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user_id: None,
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blog_id: None,
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word: Some($value),
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}
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};
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(@elem Prefix $id:expr, $value:expr) => {
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NewListElem {
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list_id: $id,
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user_id: None,
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blog_id: None,
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word: Some($value),
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}
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};
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(@in_type User) => { i32 };
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(@in_type Blog) => { i32 };
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(@in_type Word) => { &str };
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(@in_type Prefix) => { &str };
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(@out_type User) => { User };
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(@out_type Blog) => { Blog };
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(@out_type Word) => { String };
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(@out_type Prefix) => { String };
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(add: $fn:ident, $kind:ident) => {
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pub fn $fn(&self, conn: &Connection, vals: &[func!(@in_type $kind)]) -> Result<()> {
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if self.kind() != ListType::$kind {
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return Err(Error::InvalidValue);
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}
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diesel::insert_into(list_elems::table)
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.values(
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vals
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.iter()
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.map(|u| func!(@elem $kind self.id, u))
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.collect::<Vec<_>>(),
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)
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.execute(conn)?;
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Ok(())
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}
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};
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(list: $fn:ident, $kind:ident, $table:ident) => {
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pub fn $fn(&self, conn: &Connection) -> Result<Vec<func!(@out_type $kind)>> {
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if self.kind() != ListType::$kind {
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return Err(Error::InvalidValue);
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}
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list_elems::table
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.filter(list_elems::list_id.eq(self.id))
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.inner_join($table::table)
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.select($table::all_columns)
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.load(conn)
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.map_err(Error::from)
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}
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};
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(set: $fn:ident, $kind:ident, $add:ident) => {
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pub fn $fn(&self, conn: &Connection, val: &[func!(@in_type $kind)]) -> Result<()> {
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if self.kind() != ListType::$kind {
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return Err(Error::InvalidValue);
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}
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self.clear(conn)?;
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self.$add(conn, val)
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}
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}
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}
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#[derive(Clone, Queryable, Identifiable)]
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struct ListElem {
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pub id: i32,
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pub list_id: i32,
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pub user_id: Option<i32>,
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pub blog_id: Option<i32>,
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pub word: Option<String>,
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}
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#[derive(Default, Insertable)]
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#[table_name = "list_elems"]
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struct NewListElem<'a> {
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pub list_id: i32,
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pub user_id: Option<i32>,
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pub blog_id: Option<i32>,
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pub word: Option<&'a str>,
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}
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impl List {
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last!(lists);
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get!(lists);
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fn insert(conn: &Connection, val: NewList<'_>) -> Result<Self> {
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diesel::insert_into(lists::table)
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.values(val)
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.execute(conn)?;
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List::last(conn)
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}
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pub fn list_for_user(conn: &Connection, user_id: Option<i32>) -> Result<Vec<Self>> {
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if let Some(user_id) = user_id {
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lists::table
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.filter(lists::user_id.eq(user_id))
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.load::<Self>(conn)
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.map_err(Error::from)
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} else {
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lists::table
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.filter(lists::user_id.is_null())
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.load::<Self>(conn)
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.map_err(Error::from)
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}
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}
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pub fn find_for_user_by_name(
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conn: &Connection,
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user_id: Option<i32>,
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name: &str,
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) -> Result<Self> {
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if let Some(user_id) = user_id {
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lists::table
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.filter(lists::user_id.eq(user_id))
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.filter(lists::name.eq(name))
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.first(conn)
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.map_err(Error::from)
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} else {
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lists::table
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.filter(lists::user_id.is_null())
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.filter(lists::name.eq(name))
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.first(conn)
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.map_err(Error::from)
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}
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}
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pub fn new(conn: &Connection, name: &str, user: Option<&User>, kind: ListType) -> Result<Self> {
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Self::insert(
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conn,
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NewList {
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name,
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user_id: user.map(|u| u.id),
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type_: kind.into(),
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},
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)
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}
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/// Returns the kind of a list
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pub fn kind(&self) -> ListType {
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self.type_.try_into().expect("invalid list was constructed")
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}
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/// Return Ok(true) if the list contain the given user, Ok(false) otherwiser,
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/// and Err(_) on error
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pub fn contains_user(&self, conn: &Connection, user: i32) -> Result<bool> {
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private::ListElem::user_in_list(conn, self, user)
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}
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/// Return Ok(true) if the list contain the given blog, Ok(false) otherwiser,
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/// and Err(_) on error
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pub fn contains_blog(&self, conn: &Connection, blog: i32) -> Result<bool> {
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private::ListElem::blog_in_list(conn, self, blog)
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}
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/// Return Ok(true) if the list contain the given word, Ok(false) otherwiser,
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/// and Err(_) on error
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pub fn contains_word(&self, conn: &Connection, word: &str) -> Result<bool> {
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private::ListElem::word_in_list(conn, self, word)
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}
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/// Return Ok(true) if the list match the given prefix, Ok(false) otherwiser,
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/// and Err(_) on error
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pub fn contains_prefix(&self, conn: &Connection, word: &str) -> Result<bool> {
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private::ListElem::prefix_in_list(conn, self, word)
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}
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/// Insert new users in a list
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func! {add: add_users, User}
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/// Insert new blogs in a list
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func! {add: add_blogs, Blog}
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/// Insert new words in a list
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func! {add: add_words, Word}
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/// Insert new prefixes in a list
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func! {add: add_prefixes, Prefix}
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/// Get all users in the list
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func! {list: list_users, User, users}
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/// Get all blogs in the list
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func! {list: list_blogs, Blog, blogs}
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/// Get all words in the list
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pub fn list_words(&self, conn: &Connection) -> Result<Vec<String>> {
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self.list_stringlike(conn, ListType::Word)
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}
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/// Get all prefixes in the list
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pub fn list_prefixes(&self, conn: &Connection) -> Result<Vec<String>> {
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self.list_stringlike(conn, ListType::Prefix)
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}
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#[inline(always)]
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fn list_stringlike(&self, conn: &Connection, t: ListType) -> Result<Vec<String>> {
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if self.kind() != t {
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return Err(Error::InvalidValue);
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}
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list_elems::table
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.filter(list_elems::list_id.eq(self.id))
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.filter(list_elems::word.is_not_null())
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.select(list_elems::word)
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.load::<Option<String>>(conn)
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.map_err(Error::from)
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.map(|r| r.into_iter().filter_map(|o| o).collect::<Vec<String>>())
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}
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pub fn clear(&self, conn: &Connection) -> Result<()> {
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diesel::delete(list_elems::table.filter(list_elems::list_id.eq(self.id)))
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.execute(conn)
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.map(|_| ())
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.map_err(Error::from)
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}
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func! {set: set_users, User, add_users}
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func! {set: set_blogs, Blog, add_blogs}
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func! {set: set_words, Word, add_words}
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func! {set: set_prefixes, Prefix, add_prefixes}
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}
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mod private {
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pub use super::*;
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use diesel::{
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dsl,
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sql_types::{Nullable, Text},
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IntoSql, TextExpressionMethods,
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};
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impl ListElem {
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insert!(list_elems, NewListElem<'_>);
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pub fn user_in_list(conn: &Connection, list: &List, user: i32) -> Result<bool> {
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dsl::select(dsl::exists(
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list_elems::table
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.filter(list_elems::list_id.eq(list.id))
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.filter(list_elems::user_id.eq(Some(user))),
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))
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.get_result(conn)
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.map_err(Error::from)
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}
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pub fn blog_in_list(conn: &Connection, list: &List, blog: i32) -> Result<bool> {
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dsl::select(dsl::exists(
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list_elems::table
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.filter(list_elems::list_id.eq(list.id))
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.filter(list_elems::blog_id.eq(Some(blog))),
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))
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.get_result(conn)
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.map_err(Error::from)
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}
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pub fn word_in_list(conn: &Connection, list: &List, word: &str) -> Result<bool> {
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dsl::select(dsl::exists(
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list_elems::table
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.filter(list_elems::list_id.eq(list.id))
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.filter(list_elems::word.eq(word)),
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))
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.get_result(conn)
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.map_err(Error::from)
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}
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pub fn prefix_in_list(conn: &Connection, list: &List, word: &str) -> Result<bool> {
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dsl::select(dsl::exists(
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list_elems::table
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.filter(
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word.into_sql::<Nullable<Text>>()
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.like(list_elems::word.concat("%")),
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)
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.filter(list_elems::list_id.eq(list.id)),
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))
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.get_result(conn)
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.map_err(Error::from)
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::{blogs::tests as blog_tests, tests::db};
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use diesel::Connection;
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#[test]
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fn list_type() {
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for i in 0..4 {
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assert_eq!(i, Into::<i32>::into(ListType::try_from(i).unwrap()));
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}
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ListType::try_from(4).unwrap_err();
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}
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#[test]
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fn list_lists() {
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let conn = &db();
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conn.test_transaction::<_, (), _>(|| {
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let (users, _) = blog_tests::fill_database(conn);
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let l1 = List::new(conn, "list1", None, ListType::User).unwrap();
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let l2 = List::new(conn, "list2", None, ListType::Blog).unwrap();
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let l1u = List::new(conn, "list1", Some(&users[0]), ListType::Word).unwrap();
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let l_eq = |l1: &List, l2: &List| {
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assert_eq!(l1.id, l2.id);
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assert_eq!(l1.user_id, l2.user_id);
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assert_eq!(l1.name, l2.name);
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assert_eq!(l1.type_, l2.type_);
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};
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let l1bis = List::get(conn, l1.id).unwrap();
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l_eq(&l1, &l1bis);
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let l_inst = List::list_for_user(conn, None).unwrap();
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let l_user = List::list_for_user(conn, Some(users[0].id)).unwrap();
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assert_eq!(2, l_inst.len());
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assert_eq!(1, l_user.len());
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assert!(l_inst.iter().all(|l| l.id != l1u.id));
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l_eq(&l1u, &l_user[0]);
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if l_inst[0].id == l1.id {
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l_eq(&l1, &l_inst[0]);
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l_eq(&l2, &l_inst[1]);
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} else {
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l_eq(&l1, &l_inst[1]);
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l_eq(&l2, &l_inst[0]);
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}
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l_eq(
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&l1,
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&List::find_for_user_by_name(conn, l1.user_id, &l1.name).unwrap(),
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);
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l_eq(
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&&l1u,
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&List::find_for_user_by_name(conn, l1u.user_id, &l1u.name).unwrap(),
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);
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Ok(())
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});
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}
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#[test]
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fn test_user_list() {
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let conn = &db();
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conn.test_transaction::<_, (), _>(|| {
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let (users, blogs) = blog_tests::fill_database(conn);
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let l = List::new(conn, "list", None, ListType::User).unwrap();
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assert_eq!(l.kind(), ListType::User);
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assert!(l.list_users(conn).unwrap().is_empty());
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assert!(!l.contains_user(conn, users[0].id).unwrap());
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assert!(l.add_users(conn, &[users[0].id]).is_ok());
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assert!(l.contains_user(conn, users[0].id).unwrap());
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assert!(l.add_users(conn, &[users[1].id]).is_ok());
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assert!(l.contains_user(conn, users[0].id).unwrap());
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assert!(l.contains_user(conn, users[1].id).unwrap());
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assert_eq!(2, l.list_users(conn).unwrap().len());
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assert!(l.set_users(conn, &[users[0].id]).is_ok());
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assert!(l.contains_user(conn, users[0].id).unwrap());
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assert!(!l.contains_user(conn, users[1].id).unwrap());
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assert_eq!(1, l.list_users(conn).unwrap().len());
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assert!(users[0] == l.list_users(conn).unwrap()[0]);
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l.clear(conn).unwrap();
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assert!(l.list_users(conn).unwrap().is_empty());
|
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assert!(l.add_blogs(conn, &[blogs[0].id]).is_err());
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Ok(())
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});
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}
|
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|
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#[test]
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fn test_blog_list() {
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let conn = &db();
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conn.test_transaction::<_, (), _>(|| {
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let (users, blogs) = blog_tests::fill_database(conn);
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let l = List::new(conn, "list", None, ListType::Blog).unwrap();
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assert_eq!(l.kind(), ListType::Blog);
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assert!(l.list_blogs(conn).unwrap().is_empty());
|
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assert!(!l.contains_blog(conn, blogs[0].id).unwrap());
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assert!(l.add_blogs(conn, &[blogs[0].id]).is_ok());
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assert!(l.contains_blog(conn, blogs[0].id).unwrap());
|
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assert!(l.add_blogs(conn, &[blogs[1].id]).is_ok());
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assert!(l.contains_blog(conn, blogs[0].id).unwrap());
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assert!(l.contains_blog(conn, blogs[1].id).unwrap());
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assert_eq!(2, l.list_blogs(conn).unwrap().len());
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assert!(l.set_blogs(conn, &[blogs[0].id]).is_ok());
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assert!(l.contains_blog(conn, blogs[0].id).unwrap());
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assert!(!l.contains_blog(conn, blogs[1].id).unwrap());
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assert_eq!(1, l.list_blogs(conn).unwrap().len());
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assert_eq!(blogs[0].id, l.list_blogs(conn).unwrap()[0].id);
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l.clear(conn).unwrap();
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assert!(l.list_blogs(conn).unwrap().is_empty());
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assert!(l.add_users(conn, &[users[0].id]).is_err());
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Ok(())
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});
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}
|
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|
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#[test]
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fn test_word_list() {
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let conn = &db();
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conn.test_transaction::<_, (), _>(|| {
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let l = List::new(conn, "list", None, ListType::Word).unwrap();
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assert_eq!(l.kind(), ListType::Word);
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assert!(l.list_words(conn).unwrap().is_empty());
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assert!(!l.contains_word(conn, "plume").unwrap());
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assert!(l.add_words(conn, &["plume"]).is_ok());
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assert!(l.contains_word(conn, "plume").unwrap());
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assert!(!l.contains_word(conn, "plumelin").unwrap());
|
|
|
|
assert!(l.add_words(conn, &["amsterdam"]).is_ok());
|
|
assert!(l.contains_word(conn, "plume").unwrap());
|
|
assert!(l.contains_word(conn, "amsterdam").unwrap());
|
|
assert_eq!(2, l.list_words(conn).unwrap().len());
|
|
|
|
assert!(l.set_words(conn, &["plume"]).is_ok());
|
|
assert!(l.contains_word(conn, "plume").unwrap());
|
|
assert!(!l.contains_word(conn, "amsterdam").unwrap());
|
|
assert_eq!(1, l.list_words(conn).unwrap().len());
|
|
assert_eq!("plume", l.list_words(conn).unwrap()[0]);
|
|
|
|
l.clear(conn).unwrap();
|
|
assert!(l.list_words(conn).unwrap().is_empty());
|
|
|
|
assert!(l.add_prefixes(conn, &["something"]).is_err());
|
|
Ok(())
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn test_prefix_list() {
|
|
let conn = &db();
|
|
conn.test_transaction::<_, (), _>(|| {
|
|
let l = List::new(conn, "list", None, ListType::Prefix).unwrap();
|
|
|
|
assert_eq!(l.kind(), ListType::Prefix);
|
|
assert!(l.list_prefixes(conn).unwrap().is_empty());
|
|
|
|
assert!(!l.contains_prefix(conn, "plume").unwrap());
|
|
assert!(l.add_prefixes(conn, &["plume"]).is_ok());
|
|
assert!(l.contains_prefix(conn, "plume").unwrap());
|
|
assert!(l.contains_prefix(conn, "plumelin").unwrap());
|
|
|
|
assert!(l.add_prefixes(conn, &["amsterdam"]).is_ok());
|
|
assert!(l.contains_prefix(conn, "plume").unwrap());
|
|
assert!(l.contains_prefix(conn, "amsterdam").unwrap());
|
|
assert_eq!(2, l.list_prefixes(conn).unwrap().len());
|
|
|
|
assert!(l.set_prefixes(conn, &["plume"]).is_ok());
|
|
assert!(l.contains_prefix(conn, "plume").unwrap());
|
|
assert!(!l.contains_prefix(conn, "amsterdam").unwrap());
|
|
assert_eq!(1, l.list_prefixes(conn).unwrap().len());
|
|
assert_eq!("plume", l.list_prefixes(conn).unwrap()[0]);
|
|
|
|
l.clear(conn).unwrap();
|
|
assert!(l.list_prefixes(conn).unwrap().is_empty());
|
|
|
|
assert!(l.add_words(conn, &["something"]).is_err());
|
|
Ok(())
|
|
});
|
|
}
|
|
}
|