X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=server%2Fmodels%2FProblem.js;fp=server%2Fmodels%2FProblem.js;h=a1f99031297f962ebdbf3b59cec20353bc966f7f;hb=625022fdcf750f0aff8fcd699f7e9b89730e1d10;hp=0000000000000000000000000000000000000000;hpb=b955c65b942d09d24b5c3bed0d755d4f2f8f71f1;p=vchess.git

diff --git a/server/models/Problem.js b/server/models/Problem.js
new file mode 100644
index 00000000..a1f99031
--- /dev/null
+++ b/server/models/Problem.js
@@ -0,0 +1,81 @@
+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;