*/
const ProblemModel = {
+
checkProblem: function(p) {
return (
p.id.toString().match(/^[0-9]+$/) &&
});
},
- getAll: function(cb) {
+ getNext: function(uid, onlyMine, cursor, cb) {
+ let condition = "";
+ if (onlyMine) condition = "AND uid = " + uid + " ";
+ else if (!!uid) condition = "AND uid <> " + uid + " ";
db.serialize(function() {
const query =
"SELECT * " +
- "FROM Problems";
- db.all(query, (err,problems) => {
+ "FROM Problems " +
+ "WHERE added < " + cursor + " " +
+ condition +
+ "ORDER BY added DESC " +
+ "LIMIT 20"; //TODO: 20 is arbitrary
+ db.all(query, (err, problems) => {
cb(err, problems);
});
});
"SELECT * " +
"FROM Problems " +
"WHERE id = " + id;
- db.get(query, (err,problem) => {
+ db.get(query, (err, problem) => {
cb(err, problem);
});
});
},
- safeUpdate: function(prob, uid) {
+ safeUpdate: function(prob, uid, devs) {
db.serialize(function() {
+ let whereClause = "WHERE id = " + prob.id;
+ if (!devs.includes(uid)) whereClause += " AND uid = " + uid;
const query =
"UPDATE Problems " +
"SET " +
"fen = '" + prob.fen + "'," +
"instruction = ?," +
"solution = ? " +
- "WHERE id = " + prob.id + " AND uid = " + uid;
- db.run(query, [prob.instruction,prob.solution]);
+ whereClause;
+ db.run(query, [prob.instruction, prob.solution]);
});
},
- safeRemove: function(id, uid) {
+ safeRemove: function(id, uid, devs) {
db.serialize(function() {
+ let whereClause = "WHERE id = " + id;
+ if (!devs.includes(uid)) whereClause += " AND uid = " + uid;
const query =
"DELETE FROM Problems " +
- "WHERE id = " + id + " AND uid = " + uid;
+ whereClause;
db.run(query);
});
- },
-}
+ }
+
+};
module.exports = ProblemModel;