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local mymodule = {}
db = require("acf.db")
-- Helper library for model functions for viewing and editing database entries
-- Relies heavily on the acf-lib/db.lua library (db object passed into each function)
local function get_connection(dbase, self, clientdata)
local retval = cfe({ type="group", value={} })
retval.value.connection = cfe({ type="group", value={}, label="Database Connection", seq=0 })
retval.value.connection.value.engine = cfe({ type="select", label="Database Engine", option={}, key=true, seq=1 })
for n,v in pairs(db.engine) do
retval.value.connection.value.engine.option[#retval.value.connection.value.engine.option+1] = {label=n, value=tostring(v)}
end
retval.value.connection.value.database = cfe({ label="Database", key=true, seq=2 })
retval.value.connection.value.user = cfe({ label="User", key=true, seq=3 })
retval.value.connection.value.password = cfe({ type="password", label="Password", key=true, seq=4 })
retval.value.connection.value.host = cfe({ label="Host", key=true, seq=5 })
retval.value.connection.value.port = cfe({ label="Port", key=true, seq=6 })
self.handle_clientdata(retval, clientdata)
-- If dbase has a default, remove the cfe. Otherwise, fill in with the value from the cfe.
for n,v in pairs(retval.value.connection.value) do
if dbase[n] then
retval.value.connection.value[n] = nil
elseif n == "engine" then
dbase[n] = tonumber(v.value)
else
dbase[n] = v.value
end
end
return retval
end
local function fill_connection(dbase, self, retval)
-- Fill in dbase with the values from the cfe retval
for n,v in pairs(retval.value.connection.value) do
if n == "engine" then
dbase[n] = tonumber(v.value)
else
dbase[n] = v.value
end
end
return retval
end
function mymodule.list_databases(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = get_connection(db, self, clientdata)
retval.label = "List of Databases"
retval.value.databases = cfe({ type="list", value={}, label="List of Databases" })
local res, err = pcall(function()
retval.value.databases.value = db.listdatabases()
end)
if not res and err then
retval.value.connection.errtxt = err
end
return retval
end
function mymodule.list_tables(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = get_connection(db, self, clientdata)
retval.label = "List of Database Tables"
retval.value.tables = cfe({ type="list", value={}, label="List of Database Tables" })
local res, err = pcall(function()
local connected = db.databaseconnect()
retval.value.tables.value = db.listtables()
if connected then db.databasedisconnect() end
end)
if not res and err then
retval.value.connection.errtxt = err
end
return retval
end
function mymodule.list_table_entries(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = get_connection(db, self, clientdata)
retval.label = "Database Table Entries"
retval.value.table = cfe({ label="Table", key=true })
self.handle_clientdata(retval, clientdata)
retval.value.fields = cfe({ type="list", value={}, label="List of Table Fields" })
retval.value.keyfields = cfe({ type="list", value={}, label="List of Key Table Fields" })
retval.value.entries = cfe({ type="structure", value={}, label="List of Database Entries" })
local res, err = pcall(function()
local connected = db.databaseconnect()
local tables = db.listtables()
retval.value.table.errtxt = "Table does not exist"
retval.errtxt = "Table does not exist"
for i,t in ipairs(tables) do
if t == retval.value.table.value then
retval.value.table.errtxt = nil
retval.errtxt = nil
retval.value.fields.value = db.listcolumns(t) or {}
retval.value.keyfields.value = db.listkeycolumns(t) or {}
retval.value.entries.value = db.getselectresponse("SELECT * FROM "..db.escape(t)) or {}
end
end
if connected then db.databasedisconnect() end
end)
if not res and err then
retval.value.connection.errtxt = err
end
return retval
end
function mymodule.get_new_table_entry(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = get_connection(db, self, clientdata)
retval.label = "Database Table Entry"
retval.value.table = cfe({ label="Table", errtxt="Table does not exist", key=true, seq=1 })
self.handle_clientdata(retval, clientdata)
retval.errtxt = "Table does not exist"
if retval.value.table.value ~= "" then
local res, err = pcall(function()
local connected = db.databaseconnect()
local tables = db.listtables()
for i,t in ipairs(tables) do
if t == retval.value.table.value then
retval.value.table.errtxt = nil
retval.value.table.readonly = true
retval.errtxt = nil
for n,v in pairs(retval.value.connection.value) do
v.readonly = true
end
break
end
end
if not errtxt then
retval.value.fields = cfe({ type="group", value={}, label="Table Fields", seq=2 })
local fields = db.listcolumns(retval.value.table.value)
for i,f in ipairs(fields) do
retval.value.fields.value[f] = cfe({ label=f, seq=i })
end
end
if connected then db.databasedisconnect() end
end)
if not res and err then
retval.value.connection.errtxt = err
end
end
return retval
end
function mymodule.get_table_entry(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = mymodule.get_new_table_entry(db, self, clientdata)
self.handle_clientdata(retval, clientdata) -- Fill in the fields
if not retval.value.connection.errtxt and not retval.value.table.errtxt and retval.value.fields then
local res, err = pcall(function()
local connected = db.databaseconnect()
local keyfields = db.listkeycolumns(retval.value.table.value)
local reversekeyfields = {}
local fieldchecks = {}
for i,f in ipairs(keyfields) do
reversekeyfields[f] = i
retval.value.fields.value[f].errtxt = "Entry does not exist"
fieldchecks[#fieldchecks+1] = f.."='"..db.escape(retval.value.fields.value[f].value).."'"
end
retval.errtxt = "Entry does not exist"
local sql = "SELECT * FROM "..db.escape(retval.value.table.value).." WHERE "..table.concat(fieldchecks, " AND ")
local entry = db.getselectresponse(sql)
if entry and #entry > 0 then
retval.errtxt = nil
for n,v in pairs(entry[1]) do
if retval.value.fields.value[n] then retval.value.fields.value[n].value = v end
if reversekeyfields[n] then
retval.value.fields.value[n].readonly = true
retval.value.fields.value[n].errtxt = nil
end
end
end
if connected then db.databasedisconnect() end
end)
if not res and err then
retval.errtxt = err
end
end
return retval
end
function mymodule.create_table_entry(dbase, self, entry, action)
return mymodule.update_table_entry(dbase, self, entry, action, true)
end
function mymodule.update_table_entry(dbase, self, entry, action, create)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
fill_connection(db, self, entry)
local success = true
local errtxt
-- Validate the settings
-- relying on get_table_entry to do the validation of table
if entry.value.table.value == "" or entry.value.table.errtxt or nil == entry.value.fields then
success = false
entry.value.table.errtxt = "Table does not exist"
end
if success then
local res, err = pcall(function()
local connected = db.databaseconnect()
local keyfields = db.listkeycolumns(entry.value.table.value)
local reversekeyfields = {}
local fieldchecks = {}
for i,f in ipairs(keyfields) do
reversekeyfields[f] = i
entry.value.fields.value[f].errtxt = "Entry does not exist"
fieldchecks[#fieldchecks+1] = f.."='"..db.escape(entry.value.fields.value[f].value).."'"
end
local sql = "SELECT * FROM "..db.escape(entry.value.table.value).." WHERE "..table.concat(fieldchecks, " AND ")
local tmp = db.getselectresponse(sql)
if not create and (not tmp or #tmp == 0) then
success = false
for i,n in ipairs(keyfields) do
entry.value.fields.value[n].errtxt = "Entry does not exist"
end
elseif create and tmp and #tmp>0 then
success = false
for i,n in ipairs(keyfields) do
entry.value.fields.value[n].errtxt = "Entry already exists"
end
end
if success then
local names = {}
local values = {}
for n,v in pairs(entry.value.fields.value) do
if create or not reversekeyfields[n] then
names[#names+1] = db.escape(n)
values[#values+1] = db.escape(v.value)
end
end
if create then
sql = "INSERT INTO "..db.escape(entry.value.table.value).." ("..table.concat(names, ", ")..") VALUES('"..table.concat(values, "', '").."')"
else
sql = "UPDATE "..db.escape(entry.value.table.value).." SET ("..table.concat(names, ", ")..") = ('"..table.concat(values, "', '").."') WHERE "..table.concat(fieldchecks, " AND ")
end
db.runsqlcommand(sql)
end
if connected then db.databasedisconnect() end
end)
if not res and err then
success = false
errtxt = err
end
end
if not success then
if create then
entry.errtxt = errtxt or "Failed to create entry"
else
entry.errtxt = errtxt or "Failed to save entry"
end
end
return entry
end
function mymodule.get_delete_table_entry(dbase, self, clientdata)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
local retval = get_connection(db, self, clientdata)
retval.label = "Delete Database Table Entry"
retval.value.table = cfe({ label="Table", errtxt="Table does not exist", key=true, seq=1 })
self.handle_clientdata(retval, clientdata)
retval.errtxt = "Table does not exist"
if retval.value.table.value ~= "" then
local res, err = pcall(function()
local connected = db.databaseconnect()
local tables = db.listtables()
for i,t in ipairs(tables) do
if t == retval.value.table.value then
retval.value.table.errtxt = nil
retval.value.table.readonly = true
retval.errtxt = nil
for n,v in pairs(retval.value.connection.value) do
v.readonly = true
end
break
end
end
if not errtxt then
local keyfields = db.listkeycolumns(retval.value.table.value)
retval.value.fields = cfe({ type="group", value={}, label="Table Fields", seq=2 })
for i,f in ipairs(keyfields) do
retval.value.fields.value[f] = cfe({ label=f, seq=i })
end
end
if connected then db.databasedisconnect() end
end)
if not res and err then
retval.value.connection.errtxt = err
end
end
return retval
end
function mymodule.delete_table_entry(dbase, self, entry)
local db = dbase
if type(dbase) == "function" then
db = dbase()
end
fill_connection(db, self, entry)
entry.errtxt = "Failed to delete table entry"
if entry.value.table.value == "" then
entry.value.table.errtxt = "Invalid table"
else
local res, err = pcall(function()
local connected = db.databaseconnect()
entry.value.table.errtxt = "Invalid table"
local tables = db.listtables()
for i,t in ipairs(tables) do
if t == entry.value.table.value then
entry.value.table.errtxt = nil
break
end
end
if not entry.value.table.errtxt then
local keyfields = db.listkeycolumns(entry.value.table.value)
local fieldchecks = {}
for i,f in ipairs(keyfields) do
fieldchecks[#fieldchecks+1] = f.."='"..db.escape(entry.value.fields.value[f].value).."'"
end
local sql = "DELETE FROM "..db.escape(entry.value.table.value).." WHERE "..table.concat(fieldchecks, " AND ")
db.runsqlcommand(sql)
entry.errtxt = nil
end
if connected then db.databasedisconnect() end
end)
if not res and err then
entry.errtxt = err
end
end
return entry
end
return mymodule
|