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sql manager

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This commit is contained in:
Janis Hutz
2023-07-12 16:23:13 +02:00
parent cdaa6d76e5
commit 447533ed87
2 changed files with 85 additions and 6 deletions
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4
src/server/app.js
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@@ -44,8 +44,8 @@ app.use( bodyParser.json() );
app.use( cookieParser() ); app.use( cookieParser() );
app.use( express.static( '../webapp/dist' ) ); app.use( express.static( '../webapp/dist' ) );
require( './admin/routes.js' )( app, settings ); // admin route require( './admin/routes.js' )( app, settings ); // admin routes
require( './backend/userRoutes.js' )( app, settings ); // user route require( './backend/userRoutes.js' )( app, settings ); // user routes
app.use( ( request, response ) => { app.use( ( request, response ) => {
response.sendFile( path.join( __dirname + '/../webapp/dist/index.html' ) ); response.sendFile( path.join( __dirname + '/../webapp/dist/index.html' ) );

87
src/server/backend/db/mysqldb.js
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@@ -61,10 +61,89 @@ class SQLDB {
} ); } );
} }
query ( operation, dataToBeInserted ) { query ( operation, table ) {
// Legal options for the operation parameter are objects with the command attribute: return new Promise( ( resolve, reject ) => {
// getAllData, getFilteredData, getRelationalData, // getAllData, getFilteredData, InnerJoin, LeftJoin, RightJoin, addData, updateData, deleteData, checkDataAvailability, fullCustomCommand (NOTE: SANITISATION WILL NOT TAKE PLACE!)
this.sqlConnection.query(); /*
Possible operation.command values (all need the table argument of the method call):
- getAllData: no additional instructions needed
- getFilteredData:
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
- InnerJoin (Select values that match in both tables):
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
- operation.selection (The columns of both tables to be selected, e.g. users.name, orders.id)
- operation.secondTable (The second table to perform Join operation with)
- operation.matchingParam (Which properties should be matched to get the data, e.g. order.user_id=users.id)
- LeftJoin (Select values in first table and return all corresponding values of second table):
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
- operation.selection (The columns of both tables to be selected, e.g. users.name, orders.id)
- operation.secondTable (The second table to perform Join operation with)
- operation.matchingParam (Which properties should be matched to get the data, e.g. order.user_id=users.id)
- RightJoin (Select values in second table and return all corresponding values of first table):
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
- operation.selection (The columns of both tables to be selected, e.g. users.name, orders.id)
- operation.secondTable (The second table to perform Join operation with)
- operation.matchingParam (Which properties should be matched to get the data, e.g. order.user_id=users.id)
- addData:
- operation.columns (the columns into which the data should be inserted (as a space separated string))
- operation.values (the data to be inserted into the columns selected before (as a space separated string))
- updateData:
- operation.newValues (a object with keys being the column and value being the value to be inserted into that column, values are being
sanitised by the function)
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
- checkDataAvailability:
- operation.property (the column to search for the value),
- operation.searchQuery (the value to search for [will be sanitised by method])
*/
let command = '';
if ( operation.command === 'getAllData' ) {
command = 'SELECT * FROM ' + table;
} else if ( operation.command === 'getFilteredData' ) {
command = 'SELECT * FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery );
} else if ( operation.command === 'fullCustomCommand' ) {
command = operation.query;
} else if ( operation.command === 'addData' ) {
command = 'INSERT INTO ' + table + ' (' + operation.columns + ') VALUES (' + this.sqlConnection.escape( operation.values ) + ');';
} else if ( operation.command === 'updateData' ) {
if ( !operation.property || !operation.searchQuery ) reject( 'Refusing to run destructive command: Missing Constraints' );
else {
command = 'UPDATE ' + table + ' SET ';
for ( let value in operation.newValues ) {
command += value + ' = ' + this.sqlConnection.escape( operation.newValues[ value ] );
}
command += ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery );
}
} else if ( operation.command === 'deleteData' ) {
if ( !operation.property || !operation.searchQuery ) reject( 'Refusing to run destructive command: Missing Constraints' );
else {
command = 'DELETE FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery );
}
} else if ( operation.command === 'InnerJoin' ) {
command = 'SELECT ' + operation.selection + ' FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery ) + ' INNER JOIN ' + operation.secondTable + ' ON ' + operation.matchingParam;
} else if ( operation.command === 'LeftJoin' ) {
command = 'SELECT ' + operation.selection + ' FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery ) + ' LEFT JOIN ' + operation.secondTable + ' ON ' + operation.matchingParam;
} else if ( operation.command === 'RightJoin' ) {
command = 'SELECT ' + operation.selection + ' FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery ) + ' RIGHT JOIN ' + operation.secondTable + ' ON ' + operation.matchingParam;
} else if ( operation.command === 'checkDataAvailability' ) {
command = 'SELECT * FROM ' + table + ' WHERE ' + operation.property + ' = ' + this.sqlConnection.escape( operation.searchQuery );
}
this.sqlConnection.query( command, ( error, results ) => {
if ( error ) reject( error );
console.log( results );
resolve( results );
} );
} );
} }
} }