Add support for generic timeline (#525)

* Begin adding support for timeline

* fix some bugs with parser

* fmt

* add error reporting for parser

* add tests for timeline query parser

* add rejection tests for parse

* begin adding support for lists

also run migration before compiling, so schema.rs is up to date

* add sqlite migration

* end adding lists

still miss tests and query integration

* cargo fmt

* try to add some tests

* Add some constraint to db, and fix list test

and refactor other tests to use begin_transaction

* add more tests for lists

* add support for lists in query executor

* add keywords for including/excluding boosts and likes

* cargo fmt

* add function to list lists used by query

will make it easier to warn users when creating timeline with unknown lists

* add lang support

* add timeline creation error message when using unexisting lists

* Update .po files

* WIP: interface for timelines

* don't use diesel for migrations

not sure how it passed the ci on the other branch

* add some tests for timeline

add an int representing the order of timelines (first one will be on
top, second just under...)
use first() instead of limit(1).get().into_iter().nth(0)
remove migrations from build artifacts as they are now compiled in

* cargo fmt

* remove timeline order

* fix tests

* add tests for timeline creation failure

* cargo fmt

* add tests for timelines

* add test for matching direct lists and keywords

* add test for language filtering

* Add a more complex test for Timeline::matches, and fix TQ::matches for TQ::Or

* Make the main crate compile + FMT

* Use the new timeline system

- Replace the old "feed" system with timelines
- Display all timelines someone can access on their home page (either their personal ones, or instance timelines)
- Remove functions that were used to get user/local/federated feed
- Add new posts to timelines
- Create a default timeline called "My feed" for everyone, and "Local feed"/"Federated feed" with timelines

@fdb-hiroshima I don't know if that's how you pictured it? If you imagined it differently I can of course make changes.

I hope I didn't forgot anything…

* Cargo fmt

* Try to fix the migration

* Fix tests

* Fix the test (for real this time ?)

* Fix the tests ? + fmt

* Use Kind::Like and Kind::Reshare when needed

* Forgot to run cargo fmt once again

* revert translations

* fix reviewed stuff

* reduce code duplication by macros

* cargo fmt

migrations/postgres/2019-06-20-145757_timeline/down.sql

@@ -0,0 +1,6 @@
+-- This file should undo anything in `up.sql`
+
+DROP TABLE timeline;
+DROP TABLE timeline_definition;
+DROP TABLE list_elems;
+DROP TABLE lists;

migrations/postgres/2019-06-20-145757_timeline/up.sql

@@ -0,0 +1,31 @@
+-- Your SQL goes here
+
+CREATE TABLE timeline_definition(
+	id SERIAL PRIMARY KEY,
+	user_id integer REFERENCES users ON DELETE CASCADE,
+	name VARCHAR NOT NULL,
+	query VARCHAR NOT NULL,
+	CONSTRAINT timeline_unique_user_name UNIQUE(user_id, name)
+);
+
+CREATE TABLE timeline(
+	id SERIAL PRIMARY KEY,
+	post_id integer NOT NULL REFERENCES posts ON DELETE CASCADE,
+	timeline_id integer NOT NULL REFERENCES timeline_definition ON DELETE CASCADE
+);
+
+CREATE TABLE lists(
+	id SERIAL PRIMARY KEY,
+	name VARCHAR NOT NULL,
+	user_id integer REFERENCES users ON DELETE CASCADE,
+	type integer NOT NULL,
+	CONSTRAINT list_unique_user_name UNIQUE(user_id, name)
+);
+
+CREATE TABLE list_elems(
+	id SERIAL PRIMARY KEY,
+	list_id integer NOT NULL REFERENCES lists ON DELETE CASCADE,
+	user_id integer REFERENCES users ON DELETE CASCADE,
+	blog_id integer REFERENCES blogs ON DELETE CASCADE,
+	word VARCHAR
+);

migrations/postgres/2019-06-24-101212_use_timelines_for_feed/down.sql

@@ -0,0 +1,4 @@
+-- This file should undo anything in `up.sql`
+DELETE FROM timeline_definition WHERE name = 'Your feed';
+DELETE FROM timeline_definition WHERE name = 'Local feed' AND query = 'local';
+DELETE FROM timeline_definition WHERE name = 'Federared feed' AND query = 'all';

migrations/postgres/2019-06-24-101212_use_timelines_for_feed/up.sql

@@ -0,0 +1,17 @@
+-- Your SQL goes here
+--#!|conn: &Connection, path: &Path| {
+--#!	super::timeline::Timeline::new_for_instance(conn, "Local feed".into(), "local".into()).expect("Local feed creation error");
+--#!	super::timeline::Timeline::new_for_instance(conn, "Federated feed".into(), "all".into()).expect("Federated feed creation error");
+--#!
+--#!	for i in 0.. {
+--#!		if let Some(users) = super::users::User::get_local_page(conn, (i * 20, (i + 1) * 20)).ok().filter(|l| !l.is_empty()) {
+--#!			for u in users {
+--#!				super::timeline::Timeline::new_for_user(conn, u.id, "Your feed".into(), format!("followed or author in [ {} ]", u.fqn)).expect("User feed creation error");
+--#!			}
+--#!		} else {
+--#!			break;
+--#!		}
+--#!	}
+--#!
+--#!	Ok(())
+--#!}