Fill out the new schema a bit more

sql/SQLite3/7.sql

@@ -3,39 +3,125 @@
 -- See LICENSE and AUTHORS files for details
 
 -- Create a temporary table mapping old article IDs to new article IDs per-user.
--- This will have the result of every article ID being new, which will make the initial sync painful,
--- but it will avoid potential weird behaviour
+-- Any articles which have only one subscription will be unchanged, which will
+-- limit the amount of disruption
 create table arsse_articles_map(
     article int not null,
     subscription int not null,
+    owner text not null,
     id integer primary key autoincrement
 );
-insert into arsse_articles_map(article, subscription) values(1,1);
+insert into arsse_articles_map(article, subscription, owner) values(1, 1, '');
 delete from arsse_articles_map;
 update sqlite_sequence set seq = (select max(id) from arsse_articles) where name = 'arsse_articles_map';
 insert into arsse_articles_map(article, subscription)
-    select arsse_articles.id as article, arsse_subscriptions.id as subscription from arsse_articles cross join arsse_subscriptions using(feed);
+    select 
+        a.id as article, 
+        s.id as subscription,
+        s,owner as owner
+    from arsse_articles as a cross join arsse_subscriptions as s using(feed)
+    where feed in (
+        select feed from (select feed, count(*) as count from arsse_subscriptions group by feed) as c where c.count > 1
+    );
+insert into arsse_articles_map(article, subscription, owner, id)
+    select 
+        a.id as article, 
+        s.id as subscription,
+        s.owner as owner,
+        a.id as id
+    from arsse_articles as a cross join arsse_subscriptions as s using(feed)
+    where feed in (
+        select feed from (select feed, count(*) as count from arsse_subscriptions group by feed) as c where c.count = 1
+    );
 
--- Perform a similar reset for editions
+-- Create a new articles table which combines the marks table but does not include content
+create table arsse_articles_new(
+    id integer primary key,
+    subscription integer not null references arsse_subscriptions(id) on delete cascade on update cascade,
+    read boolean not null default 0,
+    starred boolean not null default 0,
+    hidden boolean not null default 0,
+    published text,
+    edited text,
+    modified text not null default CURRENT_TIMESTAMP,
+    marked text,
+    url text,
+    title text collate nocase,
+    author text collate nocase,
+    guid text,
+    url_title_hash text not null,
+    url_content_hash text not null,
+    title_content_hash text not null,
+    note text not null default ''
+);
+insert into arsse_articles_new
+    select
+        i.id,
+        i.subscription,
+        m.read,
+        m.starred,
+        m.hidden,
+        a.published,
+        a.edited,
+        a.modified,
+        m.modified,
+        a.url,
+        a.title,
+        a.author,
+        a.guid,
+        a.url_title_hash,
+        a_url_content_hash,
+        a.title_content_hash,
+        m.note
+    from arsse_articles_map as i
+    left join arsse_articles as a on a.id = i.article
+    left join arsse_marks as m on a.id = m.article;
+
+-- Create a new table to hold article content
+create table arsse_article_contents(
+    id integer primary key references arsse_articles(id) on delete cascade on update cascade,
+    content text
+);
+insert into arsse_article_contents
+    select
+        i.id,
+        a.content
+    from arsse_articles_map as i
+    left join arsse_articles as a on a.id = i.article;
+
+-- Create a new table for editions
 create table arsse_editions_temp(
     id integer primary key autoincrement,
     article integer
 );
+create table arsse_editions_new(
+    id integer primary key,
+    article integer references arsse_articles(id) on delete cascade on update cascade
+);
 insert into arsse_editions_temp values(1,1);
 delete from arsse_editions_temp;
 update sqlite_sequence set seq = (select max(id) from arsse_editions) where name = 'arsse_editions_temp';
-insert into arsse_editions_temp(article) select id from arsse_articles_map;
+insert into arsse_editions_temp(article) select id from arsse_articles_map where id = article;
+insert into arsse_editions_temp(id, article)
+    select id, article from arsse_editions where article in (select article from arsse_editions_temp where id <> article);
+insert into arsse_editions_new select * from arsse_editions_temp;
 
--- Create a new articles table which combines the marks table
-
--- Create a new table to hold article content
-
--- Fix up the enclosures table
+-- Create a new enclosures table
+create table arsse_enclosures_new(
+    article integer not null references arsse_articles(id) on delete cascade,
+    url text,
+    type text
+);
+insert into arsse_enclosures_new 
+    select
+        i.id,
+        e.url,
+        e.type
+    from arsse_articles_map as i 
+    join arsse_enclosures as e on e.article = i.article;  
 
 -- Fix up the label members table
 
--- Rebuild the editions table
-
 -- Create a new subscriptions table which combines the feeds table
 
 -- Fix up the tag members table