mitteneer
162341fb5f
The birthday paradox is a real problem with the size of our datasets. i64 is the largest numerical value we can use, and there's a 0.1% chance of collision with ~2,000,000 values, so I feel pretty comfortable with this
424 lines
21 KiB
Zig
424 lines
21 KiB
Zig
// Probably the worst code in the project
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const jetzig = @import("jetzig");
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const TableRow = @import("types.zig").TableRow;
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const HyperlinkData = @import("types.zig").HyperlinkData;
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const std = @import("std");
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pub fn entityQueryResult(request: *jetzig.Request, query: GeneratedQuery, args: anytype) !*jetzig.Data.Value {
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//var result = try request.repo.executeSql(query.query, args);
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//
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var result = try request.repo.connection.?.postgresql.connection.queryOpts(query.query, args, .{ .allocator = request.allocator, .column_names = true });
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defer result.deinit();
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var Data = jetzig.Data.init(request.allocator);
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var artist_list = std.ArrayList(HyperlinkData).init(request.allocator);
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if (query.query_type == .entity_info) {
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var out: *jetzig.Data.Value = try Data.object();
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const entity = try (try result.next()).?.to(EntityInfoResult, .{ .dupe = true, .allocator = request.allocator, .map = .name });
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try out.put("entity_info", entity);
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try result.drain();
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return out.get("entity_info").?;
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}
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var out: *jetzig.Data.Value = try Data.array();
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var mapper = result.mapper(UnifiedResult, .{ .dupe = true, .allocator = request.allocator });
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blk: while (try mapper.next()) |entity| {
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if (entity.artist_id) |_| {
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const last_artist = artist_list.getLastOrNull();
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try artist_list.append(.{ .name = entity.artist_name.?, .id = entity.artist_id.? });
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if (last_artist) |la| {
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if (la.id == entity.artist_id) continue :blk;
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}
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}
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try out.append(TableRow{
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.artist = if (entity.artist_id) |_| .{ .id = entity.artist_id.?, .name = entity.artist_name.? } else null,
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.album = if (entity.album_id) |_| .{ .id = entity.album_id.?, .name = entity.album_name.? } else null,
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.song = if (entity.song_id) |_| .{ .id = entity.song_id.?, .name = entity.song_name.? } else null,
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.artistlist = if (artist_list.getLastOrNull()) |_| try artist_list.toOwnedSlice() else null,
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.scrobbles = if (entity.scrobbles) |scrobbles| scrobbles else null,
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.date = if (entity.date) |date| date else null,
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});
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}
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return out;
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}
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const EntityType = enum { scrobble, song, album, artist };
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const QueryTypeEnum = enum { firstlast, timescale, entities, get_songs, get_albums, get_scrobbles, appears, entity_info, datestreak };
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const GeneratedQuery = struct {
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entity: EntityType,
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query_type: QueryTypeEnum,
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query: []const u8,
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};
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const UnifiedResult = struct {
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album_name: ?[]const u8 = null,
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album_id: ?i64 = null,
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song_name: ?[]const u8 = null,
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song_id: ?i64 = null,
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artist_name: ?[]const u8 = null,
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artist_id: ?i64 = null,
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scrobbles: ?i64 = null,
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date: ?[]const u8 = null,
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};
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const EntityInfoResult = struct {
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album_name: ?[]const u8 = null,
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album_id: ?i64 = null,
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song_name: ?[]const u8 = null,
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song_id: ?i64 = null,
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artist_name: ?[]const u8 = null,
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artist_id: ?i64 = null,
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scrobbles: ?i64 = null,
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date: ?[]const u8 = null,
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rank: []const u8,
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song_num: ?i64 = null,
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album_num: ?i64 = null,
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};
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pub fn loadQuery(entity: EntityType, query_type: QueryTypeEnum) GeneratedQuery {
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return GeneratedQuery{
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.entity = entity,
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.query_type = query_type,
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.query = switch (query_type) {
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.firstlast =>
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//.ResultType = FirstlastResult,
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switch (entity) {
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.scrobble => unreachable,
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.song =>
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime,'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\WHERE albumsongs.song_id = $1
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\\ORDER BY scrobbles.datetime ASC
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\\LIMIT 1)
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\\
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\\UNION ALL
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\\
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\WHERE albumsongs.song_id = $1
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\\ORDER BY scrobbles.datetime DESC
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\\LIMIT 1)
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,
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.album =>
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\WHERE albums.id = $1
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\\ORDER BY scrobbles.datetime ASC
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\\LIMIT 1)
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\\
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\\UNION ALL
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\\
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\WHERE albums.id = $1
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\\ORDER BY scrobbles.datetime DESC
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\\LIMIT 1)
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,
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.artist =>
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\WHERE albumsongsartists.artist_id = $1
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\\ORDER BY scrobbles.datetime ASC
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\\LIMIT 1)
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\\
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\\UNION ALL
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\\
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\\(SELECT songs.name AS song_name, songs.id AS song_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\WHERE albumsongsartists.artist_id = $1
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\\ORDER BY scrobbles.datetime DESC
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\\LIMIT 1)
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,
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},
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.timescale =>
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//.ResultType = TimescaleResult,
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switch (entity) {
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.scrobble => unreachable,
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.song =>
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\\SELECT TO_CHAR(date_trunc('year', datetime), 'YYYY') AS date, COUNT(*) as scrobbles
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\\FROM scrobbles
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\\INNER JOIN albumsongs ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\WHERE songs.id = $1
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\\GROUP BY date
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\\ORDER BY date ASC;
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,
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.album =>
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\\SELECT TO_CHAR(date_trunc('year', datetime), 'YYYY') AS date, COUNT(*) as scrobbles
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\\FROM scrobbles
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\\INNER JOIN albumsongs ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\WHERE albums.id = $1
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\\GROUP BY date
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\\ORDER BY date ASC;
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,
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.artist =>
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\\SELECT y.year AS date, COALESCE(DT.scrobbles, 0) AS scrobbles
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\\FROM (SELECT GENERATE_SERIES(2016,date_part('year',now())::int)::text) AS y(year)
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\\LEFT JOIN (SELECT TO_CHAR(date_trunc('year', datetime), 'YYYY') AS date, COUNT(*) as scrobbles
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\\FROM scrobbles
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\\INNER JOIN albumsongs ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN artists ON artists.id = albumsongsartists.artist_id
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\\WHERE artists.id = $1
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\\GROUP BY date
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\\ORDER BY date ASC) AS DT
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\\ON DT.date = y.year;
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,
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},
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.entities =>
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//.ResultType = EntitiesResult,
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switch (entity) {
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.scrobble =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, albums.name AS album_name, albums.id AS album_id, artists.name AS artist_name, artists.id AS artist_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN artists ON artists.id = albumsongsartists.artist_id
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\\ORDER BY scrobbles.datetime ASC
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,
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.song =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, artists.name AS artist_name, artists.id AS artist_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN songs ON albumsongs.song_id = songs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN artists ON artists.id = albumsongsartists.artist_id
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\\GROUP BY songs.id, artists.id
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\\ORDER BY scrobbles DESC, songs.name ASC
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,
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.album =>
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\\SELECT albums.name AS album_name, albums.id AS album_id, artists.name AS artist_name, artists.id AS artist_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN albums ON albumsongs.album_id = albums.id
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\\INNER JOIN scrobbles ON albumsongs.id = scrobbles.albumsong
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\\INNER JOIN artistalbums ON artistalbums.album_id = albums.id
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\\INNER JOIN artists ON artists.id = artistalbums.artist_id
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\\GROUP BY albums.id, artists.id
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\\ORDER BY scrobbles DESC
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,
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.artist =>
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\\SELECT artists.name AS artist_name, artists.id AS artist_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongsartists
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\\INNER JOIN artists ON albumsongsartists.artist_id = artists.id
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\\INNER JOIN albumsongs ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\GROUP BY artists.id
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\\ORDER BY scrobbles DESC;
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,
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},
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.appears =>
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// Not sure how I feel about this one
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switch (entity) {
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.scrobble, .song, .album => unreachable,
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.artist =>
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\\SELECT albums.name AS album_name, albums.id AS album_id, COUNT(scrobbles) AS scrobbles
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\\FROM artistalbums
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\\INNER JOIN albums ON albums.id = artistalbums.album_id
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\\INNER JOIN albumsongs ON albumsongs.album_id = albums.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\WHERE albumsongsartists.artist_id = $1 AND artistalbums.artist_id != $1
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\\GROUP BY albums.id
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\\ORDER BY scrobbles DESC;
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,
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},
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.get_songs => switch (entity) {
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.scrobble, .song => unreachable, // Might be able to use this with SongGroups?
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.album =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN songs ON albumsongs.song_id = songs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE albumsongs.album_id = $1
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\\GROUP BY songs.id
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\\ORDER BY scrobbles DESC
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,
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.artist =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, albums.name AS album_name, albums.id AS album_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE albumsongsartists.artist_id = $1
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\\GROUP BY songs.id, albums.id
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\\ORDER BY scrobbles DESC
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,
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},
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.get_albums =>
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//.ResultType = EntityItemsResult,
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switch (entity) {
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.scrobble, .album => unreachable, // Might be able to use this with ReleaseGroups?
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.song =>
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\\SELECT albums.name AS album_name, albums.id AS album_id, COUNT(scrobbles) AS scrobbles
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\\FROM artistalbums
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\\INNER JOIN albums ON albums.id = artistalbums.album_id
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\\INNER JOIN albumsongs ON albumsongs.album_id = albums.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = albumsongs.id
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\\WHERE albumsongs.song_id = $1
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\\GROUP BY albums.id
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\\ORDER BY scrobbles DESC
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,
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.artist =>
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\\SELECT albums.name AS album_name, albums.id AS album_id, COUNT(scrobbles) AS scrobbles
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\\FROM artistalbums
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\\INNER JOIN albums ON albums.id = artistalbums.album_id
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\\INNER JOIN albumsongs ON albumsongs.album_id = albums.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE artistalbums.artist_id = $1
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\\GROUP BY albums.id
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\\ORDER BY scrobbles DESC
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,
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},
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.get_scrobbles => switch (entity) {
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.scrobble => unreachable,
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.song =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, albums.name AS album_name, albums.id AS album_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE songs.id = $1
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\\ORDER BY date ASC
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,
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.album =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, albums.name AS album_name, albums.id AS album_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE albums.id = $1
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\\ORDER BY date ASC
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,
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.artist =>
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\\SELECT songs.name AS song_name, songs.id AS song_id, albums.name AS album_name, albums.id AS album_id, TO_CHAR(scrobbles.datetime, 'YYYY-MM-DD HH24:MI:SS') AS date
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\\FROM albumsongs
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\WHERE artists.id = $1
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\\ORDER BY date ASC
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,
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},
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.entity_info => switch (entity) {
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.scrobble => unreachable,
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.song =>
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\\SELECT * FROM
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\\(SELECT *, TO_CHAR(ROW_NUMBER() OVER (ORDER BY scrobbles DESC),'FM99999th') AS rank FROM
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\\(SELECT songs.name AS song_name, songs.id AS song_id, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN songs ON albumsongs.song_id = songs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\GROUP BY songs.id))
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\\WHERE song_id = $1
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,
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.album =>
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\\SELECT album_name, t.album_id, artists.name AS artist_name, artists.id AS artist_id, song_num, scrobbles, rank FROM
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\\(SELECT *, TO_CHAR(ROW_NUMBER() OVER (ORDER BY scrobbles DESC),'FM9999th') AS rank FROM
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\\(SELECT albums.name AS album_name, albums.id AS album_id, COUNT(DISTINCT songs.id) AS song_num, COUNT(scrobbles) AS scrobbles
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\\FROM albumsongs
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\\INNER JOIN albums ON albumsongs.album_id = albums.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\GROUP BY albums.id)) AS t
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\\INNER JOIN artistalbums ON artistalbums.album_id = t.album_id
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\\INNER JOIN artists ON artists.id = artistalbums.artist_id
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\\WHERE t.album_id = $1
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,
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.artist =>
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\\SELECT * FROM
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\\(SELECT *, TO_CHAR(ROW_NUMBER() OVER (ORDER BY scrobbles DESC),'FM9999th') AS rank FROM
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\\(SELECT artists.name AS artist_name, artists.id AS artist_id, COUNT(scrobbles) AS scrobbles, COUNT(DISTINCT albums.id) AS album_num, COUNT(DISTINCT songs.id) AS song_num
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\\FROM albumsongsartists
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\\INNER JOIN artists ON albumsongsartists.artist_id = artists.id
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\\INNER JOIN albumsongs ON albumsongsartists.albumsong_id = albumsongs.id
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\\INNER JOIN scrobbles ON scrobbles.albumsong = albumsongs.id
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\\INNER JOIN albums ON albums.id = albumsongs.album_id
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\\INNER JOIN songs ON songs.id = albumsongs.song_id
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\\GROUP BY artists.id))
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\\WHERE artist_id = $1
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,
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},
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.datestreak => switch (entity) {
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.song =>
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\\SELECT maxseq AS streak, FORMAT('%s - %s', ds, de) AS date FROM (SELECT MAX(numdays) AS maxseq, ds, de
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\\FROM (SELECT grp, MIN(datetime::date) AS ds, MAX(datetime::date) AS de,
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\\COUNT(DISTINCT datetime::date) AS numdays
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\\FROM (SELECT scrobbles.datetime,
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\\((datetime::date - '1970-01-01'::date) - DENSE_RANK() OVER (PARTITION BY songs.id ORDER BY datetime::date)) AS grp
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\\FROM scrobbles INNER JOIN albumsongs ON albumsongs.id = albumsong INNER JOIN songs ON songs.id = albumsongs.song_id
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\\WHERE songs.id = $1) scrobbles
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\\GROUP BY grp
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\\) scrobbles
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\\GROUP BY ds, de)
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\\ORDER BY maxseq DESC;
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,
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.artist =>
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\\SELECT maxseq AS streak, FORMAT('%s - %s' ,ds,de) AS date FROM (SELECT MAX(numdays) AS maxseq, ds, de
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\\FROM (SELECT grp, MIN(datetime::date) AS ds, MAX(datetime::date) AS de,
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\\COUNT(DISTINCT datetime::date) AS numdays
|
|
\\FROM (SELECT scrobbles.datetime,
|
|
\\((scrobbles.datetime::date - '1970-01-01'::date) - DENSE_RANK() OVER (PARTITION BY artists.id ORDER BY scrobbles.datetime::date)) AS grp
|
|
\\FROM scrobbles INNER JOIN albumsongsartists ON albumsongsartists.albumsong_id = scrobbles.albumsong INNER JOIN artists ON artists.id = albumsongsartists.artist_id
|
|
\\WHERE artists.id = $1) scrobbles
|
|
\\GROUP BY grp
|
|
\\) scrobbles
|
|
\\GROUP BY ds, de)
|
|
\\ORDER BY maxseq DESC;
|
|
,
|
|
.album =>
|
|
\\SELECT maxseq AS streak, FORMAT('%s - %s', ds, de) AS date FROM (SELECT MAX(numdays) AS maxseq, ds, de
|
|
\\FROM (SELECT grp, MIN(datetime::date) AS ds, MAX(datetime::date) AS de,
|
|
\\COUNT(DISTINCT datetime::date) AS numdays
|
|
\\FROM (SELECT scrobbles.datetime,
|
|
\\((datetime::date - '1970-01-01'::date) - DENSE_RANK() OVER (PARTITION BY albums.id ORDER BY datetime::date)) AS grp FROM scrobbles INNER JOIN albumsongs ON albumsongs.id = albumsong INNER JOIN albums ON albums.id = albumsongs.album_id
|
|
\\WHERE albums.id = $1) scrobbles
|
|
\\GROUP BY grp
|
|
\\) scrobbles
|
|
\\GROUP BY ds, de)
|
|
\\ORDER BY maxseq DESC;
|
|
,
|
|
.scrobble => unreachable,
|
|
},
|
|
},
|
|
};
|
|
}
|