Fully end to end encrypted anonymous chat program. Server only stores public key lookup for users and the encrypted messages. No credentials are transfered to the server, but kept in local browser storage. This allows 100% safe chatting. https://safechat.ch
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var SqlString = exports;
SqlString.escapeId = function (val, forbidQualified) {
if (Array.isArray(val)) {
return val.map(function(v) {
return SqlString.escapeId(v, forbidQualified);
}).join(', ');
}
if (forbidQualified) {
return '`' + val.replace(/`/g, '``') + '`';
}
return '`' + val.replace(/`/g, '``').replace(/\./g, '`.`') + '`';
};
SqlString.escape = function(val, stringifyObjects, timeZone) {
if (val === undefined || val === null) {
return 'NULL';
}
switch (typeof val) {
case 'boolean': return (val) ? 'true' : 'false';
case 'number': return val+'';
}
if (val instanceof Date) {
val = SqlString.dateToString(val, timeZone || 'local');
}
if (Buffer.isBuffer(val)) {
return SqlString.bufferToString(val);
}
if (Array.isArray(val)) {
return SqlString.arrayToList(val, timeZone);
}
if (typeof val === 'object') {
if (stringifyObjects) {
val = val.toString();
} else {
return SqlString.objectToValues(val, timeZone);
}
}
val = val.replace(/[\0\n\r\b\t\\\'\"\x1a]/g, function(s) {
switch(s) {
case "\0": return "\\0";
case "\n": return "\\n";
case "\r": return "\\r";
case "\b": return "\\b";
case "\t": return "\\t";
case "\x1a": return "\\Z";
default: return "\\"+s;
}
});
return "'"+val+"'";
};
SqlString.arrayToList = function(array, timeZone) {
return array.map(function(v) {
if (Array.isArray(v)) return '(' + SqlString.arrayToList(v, timeZone) + ')';
return SqlString.escape(v, true, timeZone);
}).join(', ');
};
SqlString.format = function(sql, values, stringifyObjects, timeZone) {
values = values == null ? [] : [].concat(values);
var index = 0;
return sql.replace(/\?\??/g, function(match) {
if (index === values.length) {
return match;
}
var value = values[index++];
return match === '??'
? SqlString.escapeId(value)
: SqlString.escape(value, stringifyObjects, timeZone);
});
};
SqlString.dateToString = function dateToString(date, timeZone) {
var dt = new Date(date);
var year;
var month;
var day;
var hour;
var minute;
var second;
var millisecond;
if (timeZone === 'local') {
year = dt.getFullYear();
month = dt.getMonth() + 1;
day = dt.getDate();
hour = dt.getHours();
minute = dt.getMinutes();
second = dt.getSeconds();
millisecond = dt.getMilliseconds();
} else {
var tz = convertTimezone(timeZone);
if (tz !== false && tz !== 0) {
dt.setTime(dt.getTime() + (tz * 60000));
}
year = dt.getUTCFullYear();
month = dt.getUTCMonth() + 1;
day = dt.getUTCDate();
hour = dt.getUTCHours();
minute = dt.getUTCMinutes();
second = dt.getUTCSeconds();
millisecond = dt.getUTCMilliseconds();
}
// YYYY-MM-DD HH:mm:ss.mmm
return zeroPad(year, 4) + '-' + zeroPad(month, 2) + '-' + zeroPad(day, 2) + ' ' +
zeroPad(hour, 2) + ':' + zeroPad(minute, 2) + ':' + zeroPad(second, 2) + '.' +
zeroPad(millisecond, 3);
};
SqlString.bufferToString = function bufferToString(buffer) {
return "X'" + buffer.toString('hex') + "'";
};
SqlString.objectToValues = function(object, timeZone) {
var values = [];
for (var key in object) {
var value = object[key];
if(typeof value === 'function') {
continue;
}
values.push(this.escapeId(key) + ' = ' + SqlString.escape(value, true, timeZone));
}
return values.join(', ');
};
function zeroPad(number, length) {
number = number.toString();
while (number.length < length) {
number = '0' + number;
}
return number;
}
function convertTimezone(tz) {
if (tz === 'Z') {
return 0;
}
var m = tz.match(/([\+\-\s])(\d\d):?(\d\d)?/);
if (m) {
return (m[1] == '-' ? -1 : 1) * (parseInt(m[2], 10) + ((m[3] ? parseInt(m[3], 10) : 0) / 60)) * 60;
}
return false;
}