The document discusses user registration and login functionality in Ring. It describes classes for users (Model, View & Controller), form views for registration and login, and code to handle registration, login, and checking authentication. It also summarizes classes for database access (Database), model objects (ModelBase), and controllers (ControllerBase).
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Dominate Social Media with TubeTrivia AI’s Addictive Quiz Videos.pdf
The Ring programming language version 1.2 book - Part 32 of 84
1. Ring Documentation, Release 1.2
41.21 Users registration and Login
We have the users classes (Model, View & Controller) to deal with the users data like username & email.
The next code is stored in ex25_users.ring
Class UsersModel from ModelBase
cSearchColumn = "username"
Class UsersController From ControllerBase
41.21. Users registration and Login 290
2. Ring Documentation, Release 1.2
aColumnsNames = ["id","username","email"]
Func UpdateRecord
oModel.id = aPageVars[cRecID]
oModel.updatecolumn("username", aPageVars[:username] )
oModel.updatecolumn("email", aPageVars[:email] )
oView.UpdateView(self)
Class UsersView from ViewBase
oLanguage = new UsersLanguageEnglish
Func AddFuncScript oPage,oController
return oPage.scriptfunc("myadd",oPage.scriptredirection("ex26.ring"))
Func FormViewContent oController,oTranslation,oPage
return [
[oTranslation.aColumnsTitles[2],"textbox","username",
oController.oModel.UserName,oPage.stylewidth("100%")],
[oTranslation.aColumnsTitles[3],"textbox","email",
oController.oModel.Email,oPage.stylewidth("50%")]
]
Class UsersLanguageEnglish
cTitle = "Users Table"
cBack = "back"
aColumnsTitles = ["ID","User Name","Email"]
cOptions = "Options"
cSearch = "Search"
comboitems = ["Select Option...","Edit","Delete"]
cAddRecord = "Add Record"
cEditRecord = "Edit Record"
cRecordDeleted = "Record Deleted!"
aMovePages = ["First","Prev","Next","Last"]
cPage = "Page"
cOf = "of"
cRecordsCount = "Records Count"
cSave = "Save"
temp = new page
cTextAlign = temp.StyleTextRight()
cNoRecords = "No records!"
In the file ex25.ring we load ex25_users.ring then create an object from UsersController class.
Using the created object, we call the routing method.
#!c:ringbinring.exe -cgi
Load "weblib.ring"
Load "datalib.ring"
Load "ex25_users.ring"
Import System.Web
website = "ex25.ring"
New UsersController { Routing() }
Screen Shot:
41.21. Users registration and Login 291
7. Ring Documentation, Release 1.2
oUser = new UsersModel
oUser.Connect()
lResult = oUser.FindWith("username",aPageVars["username"])
new page {
if lResult
if sha256(aPagevars["password"]+oUser.Salt) = oUser.pwhash
text ("Correct Password!")
aPageVars["sessionid"] = str2hex(randbytes(32))
oUser.UpdateColumn("sessionid",aPageVars["sessionid"])
cookie("sessionid",aPageVars["sessionid"])
else
text ("Bad password!")
ok
else
text("Bad User Name!")
ok
}
oUser.Disconnect()
The next code for checking if the user needs to login or not
#!c:ringbinring.exe -cgi
Load "weblib.ring"
Load "datalib.ring"
Load "ex25_users.ring"
Import System.Web
oUser = new UsersModel
oUser.Connect()
lResult = oUser.FindWith("sessionid",aPageVars["sessionid"])
new page {
if lResult
text("User Name : " + oUser.username )
else
text("Please Login First!")
ok
}
oUser.Disconnect()
41.22 Database, ModelBase & ControllerBase classes
In this section we will see some code from datalib.ring
The next code presents the Database, ModelBase & ControllerBase classes
Import System.Web
Class Database
cServer = "localhost"
cUserName = "root"
cPassword = "root"
cDatabase = "mahdb"
Func Connect
41.22. Database, ModelBase & ControllerBase classes 296
8. Ring Documentation, Release 1.2
con = mysql_init()
mysql_connect(con, cServer, cUserName, cPassWord,cDatabase)
Func Disconnect
mysql_close(con)
Func Query cQuery
mysql_query(con,cQuery)
Func QueryResult
return mysql_result(con)
Func QueryResultWithColumns
# return columns names + query result
return mysql_result2(con)
Func QueryValue
aResult = mysql_result(con)
if islist(aResult) and len(aResult) >= 1
aResult = aResult[1]
if len(aResult) >= 1
return aResult[1]
ok
ok
return 0
Func EscapeString x
if isstring(x)
return MySQL_Escape_String(con,x)
else
return MySQL_Escape_String(con,string(x))
ok
Private
con = NULL
Class ModelBase from Database
cTableName = ""
cSearchColumn = "name"
aColumns = []
aQueryResult = []
ID = 0
# set table name from class name
classname = lower(classname(self))
if right(classname,5) = :model
cTablename = left(classname,len(classname)-5)
ok
Func Insert
cValues = ""
for x in aColumns
cValues += "'" + EscapeString(aPageVars[x]) + "',"
41.22. Database, ModelBase & ControllerBase classes 297
9. Ring Documentation, Release 1.2
Next
cValues = left(cValues,len(cValues)-1) # remove last comma
cColumns = ""
for x in aColumns
cColumns += x + ","
next
cColumns = left(cColumns,len(cColumns)-1)
query("insert into " + cTableName + "("+cColumns+") values (" +
cValues + ")" )
Func Update nID
cStr = ""
for x in aColumns
cStr += x + " = '" + EscapeString(aPageVars[x]) + "' , "
# the space after comma is necessary
Next
cStr = left(cStr,len(cStr)-2)
query("update " + cTableName + " set " + cStr + " where id = " + nID )
Func UpdateColumn cColumn,cValue
query("update " + cTableName + " set " + cColumn + " = '" +
EscapeString(cValue) + "' where id = " + self.ID )
Func Count cValue
query("SELECT count(*) FROM " + cTableName +
" where "+cSearchColumn+" like '" + EscapeString(cValue) + "%'")
return queryValue()
Func Read nStart,nRecordsPerPage
query("SELECT * FROM "+ cTableName+" limit " + EscapeString(nStart) + "," +
EscapeString(nRecordsPerPage) )
aQueryResult = queryResult()
Func Search cValue,nStart,nRecordsPerPage
query("SELECT * FROM "+ cTableName+" where "+cSearchColumn+" like '" +
EscapeString(cValue) + "%'" +
" limit " + EscapeString(nStart) + "," + EscapeString(nRecordsPerPage) )
aQueryResult = queryResult()
Func Find nID
query("select * from " + cTableName + " where id = " + EscapeString(nID) )
aResult = queryResult()[1]
# move the result from the array to the object attributes
ID = nID
cCode = ""
for x = 2 to len(aResult)
cCode += aColumns[x-1] + " = hex2str('" + str2hex(aResult[x]) + "')" + nl
next
eval(cCode)
Func FindWith cColumn,cValue
41.22. Database, ModelBase & ControllerBase classes 298
10. Ring Documentation, Release 1.2
query("select * from " + cTableName + " where "+cColumn+" = '" +
EscapeString(cValue) + "'" )
aResult = queryResult()
if len(aResult) > 0
aResult = aResult[1]
else
return 0
ok
# move the result from the array to the object attributes
ID = aResult[1]
cCode = ""
for x = 2 to len(aResult)
cCode += aColumns[x-1] + " = hex2str('" + str2hex(aResult[x]) + "')" + nl
next
eval(cCode)
return 1
Func Delete ID
query("delete from " + cTableName + " where id = " + EscapeString(ID) )
Func Clear
cCode = ""
for x in aColumns
cCode += x + ' = ""' + nl
next
eval(cCode)
Func LoadModel
# create the columns array
query("SELECT * FROM "+ cTableName + " limit 0,1")
aQueryResult = QueryResultWithColumns()[1]
for x = 2 to len(aQueryResult)
aColumns + lower(trim(aQueryResult[x]))
next
# create attribute for each column
for x in aColumns
addattribute(self,x)
next
Func Connect
Super.Connect()
if nLoadModel = 0
nLoadModel = 1
LoadModel()
ok
private
nLoadModel = 0
Class ControllerBase
41.22. Database, ModelBase & ControllerBase classes 299