-var db = require("../utils/database");
-
-/*
- * Structure:
- * id: problem number (int)
- * uid: user id (int)
- * vid: variant id (int)
- * added: timestamp
- * instructions: text
- * solution: text
- */
-
-const ProblemModel =
-{
- create: function(uid, vid, fen, instructions, solution, cb)
- {
- db.serialize(function() {
- const insertQuery =
- "INSERT INTO Problems (added, uid, vid, fen, instructions, solution) " +
- "VALUES (" + Date.now() + "," + uid + "," + vid + ",'" + fen + "',?,?)";
- db.run(insertQuery, [instructions, solution], err => {
- if (!!err)
- return cb(err);
- db.get("SELECT last_insert_rowid() AS rowid", cb);
- });
- });
- },
-
- getOne: function(id, callback)
- {
- db.serialize(function() {
- const query =
- "SELECT * " +
- "FROM Problems " +
- "WHERE id = " + id;
- db.get(query, callback);
- });
- },
-
- fetchN: function(vid, uid, type, directionStr, lastDt, MaxNbProblems, callback)
- {
- db.serialize(function() {
- let typeLine = "";
- if (uid > 0)
- typeLine = "AND uid " + (type=="others" ? "!=" : "=") + " " + uid;
- const query =
- "SELECT * FROM Problems " +
- "WHERE vid = " + vid +
- " AND added " + directionStr + " " + lastDt + " " + typeLine + " " +
- "ORDER BY added " + (directionStr=="<" ? "DESC " : "") +
- "LIMIT " + MaxNbProblems;
- db.all(query, callback);
- });
- },
-
- // TODO: update fails (but insert is OK)
- update: function(id, uid, fen, instructions, solution, cb)
- {
- db.serialize(function() {
- const query =
- "UPDATE Problems SET " +
- "fen = '" + fen + "', " +
- "instructions = ?, " +
- "solution = ? " +
- "WHERE id = " + id + " AND uid = " + uid;
- db.run(query, [instructions,solution], cb);
- });
- },
-
- remove: function(id, uid)
- {
- db.serialize(function() {
- const query =
- "DELETE FROM Problems " +
- "WHERE id = " + id + " AND uid = " + uid;
- db.run(query);
- });
- },
-}
-
-module.exports = ProblemModel;