summaryrefslogtreecommitdiff
path: root/src/db.lua
blob: 5d0eabf9b14518f760f4b7d97f8ed5f50cf40929 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
--
--  rhnop
--
--  Copyright (C) 2011-2016 Christian Pointner <equinox@helsinki.at>
--
--  This file is part of rhnop.
--
--  rhnop is free software: you can redistribute it and/or modify
--  it under the terms of the GNU General Public License as published by
--  the Free Software Foundation, either version 3 of the License, or
--  any later version.
--
--  rhnop is distributed in the hope that it will be useful,
--  but WITHOUT ANY WARRANTY; without even the implied warranty of
--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--  GNU General Public License for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with rhnop. If not, see <http://www.gnu.org/licenses/>.
--

luasql = require "luasql.mysql"

-- for destination database
-- CREATE DATABASE nop CHARACTER SET utf8 COLLATE utf8_unicode_ci;
-- USE nop
-- CREATE TABLE IF NOT EXISTS master (timestamp BIGINT UNSIGNED PRIMARY KEY NOT NULL, cart INT NOT NULL, len INT, showtitle VARCHAR(255), title VARCHAR(255), artist VARCHAR(255), album VARCHAR(255), carttype ENUM('show','pool','jingle'));
-- ALTER TABLE master CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;
-- CREATE TABLE IF NOT EXISTS standby (timestamp BIGINT UNSIGNED PRIMARY KEY NOT NULL, cart INT NOT NULL, len INT, showtitle VARCHAR(255), title VARCHAR(255), artist VARCHAR(255), album VARCHAR(255), carttype ENUM('show','pool','jingle'));
-- ALTER TABLE standby CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;
-- CREATE TABLE IF NOT EXISTS state (timestamp BIGINT UNSIGNED PRIMARY KEY NOT NULL, state VARCHAR(32));
-- ALTER TABLE state CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;
-- GRANT select,insert,update,delete ON nop.master TO 'nopsyncd'@'localhost' IDENTIFIED BY '<password>';
-- GRANT select,insert,update,delete ON nop.standby TO 'nopsyncd'@'localhost';
-- GRANT select,insert,update ON nop.state TO 'nopsysstated'@'localhost' IDENTIFIED BY '<password>';
-- GRANT select ON nop.* TO 'nopro'@'localhost' IDENTIFIED BY '<password>';

local db = {}

function db.init(db, user, pwd, host, port, table)
   local mydb = {}

   mydb.table = table

   local err

   mydb.env, err = luasql.mysql()
   if mydb.env == nil then
      return nil, err
   end

   mydb.con, err = mydb.env:connect(db, user, pwd, host, port)
   if mydb.con == nil then
      return nil, err
   end

   local ret, err = mydb.con:execute("SET CHARACTER SET utf8")
   if ret == nil then
      return nil, err
   end

   ret, err = mydb.con:setautocommit(true)
   if ret == nil then
      return nil, err
   end

   function mydb:getLastEntry()
      local cur, err = self.con:execute("SELECT MAX(timestamp) FROM " .. self.table)
      if cur == nil then
         return nil, err
      end

      local timestamp = cur:fetch()
      if timestamp == nil then timestamp = 0 end
      return timestamp
   end

   function mydb:findMissingEntries(lasttimestamp)
      local lastts = self.con:escape(lasttimestamp)
      return self.con:execute("SELECT * FROM " .. self.table .. " WHERE timestamp > " .. lastts)
   end

   function mydb:getNextMissingEntry(cur)
      local data = {}
      data = cur:fetch(data, "a")
      if data == nil then
         return nil, "that's all folks"
      end
      return data
   end

   function mydb:getEntry(timestamp)
      local ts = self.con:escape(timestamp)
      local cur, err = self.con:execute("SELECT * FROM " .. self.table .. " WHERE timestamp = " .. ts)
      if cur == nil then
         return nil, err
      end

      local data = {}
      data = cur:fetch(data, "a")
      if data == nil then
         return nil, "nothing found"
      end
      return data
   end

   function mydb:addEntry(data)
      local timestamp = self.con:escape(data.timestamp)
      local cart = self.con:escape(data.cart)
      local len = self.con:escape(data.len)
      local showtitle = self.con:escape(data.showtitle)
      local title = self.con:escape(data.title)
      local artist = self.con:escape(data.artist)
      local album = self.con:escape(data.album)
      local carttype = self.con:escape(data.carttype)

      local cur, err = self.con:execute("REPLACE INTO " .. self.table .. " VALUES('" .. timestamp .. "', '" .. cart .. "', '" .. len .. "', '" .. showtitle .. "', '" .. title .. "', '" .. artist .."', '" .. album .. "', '" .. carttype .. "')")
      if cur == nil then
         return nil, err
      end

      return true
   end

   function mydb:getLastSysState()
      local cur, err = self.con:execute("SELECT state FROM " .. self.table .. " WHERE timestamp = (SELECT MAX(timestamp) FROM " .. self.table .. ")")
      if cur == nil then
         return nil, err
      end

      local state = cur:fetch()
      if state == nil then state = "unknown" end
      return state
   end

   function mydb:updateSysState(timestamp, state)
      local t = self.con:escape(timestamp)
      local s = self.con:escape(state)

      local cur, err = self.con:execute("INSERT INTO " .. self.table .. " VALUES('" .. t .. "', '" .. s .. "')")
      if cur == nil then
         return nil, err
      end
      return true
   end

   function mydb:close()
      if self.con then
         self.con:close()
      end

      if self.env then
         self.env:close()
      end
   end

   return mydb
end

return db