// Generated by CoffeeScript 2.3.2
|
// # CSV Generator
|
|
// Please look at the [documentation](https://csv.js.org/generate/) for additional information.
|
var Generator, stream, util,
|
indexOf = [].indexOf;
|
|
stream = require('stream');
|
|
util = require('util');
|
|
// ## Usage
|
|
// Stream API, for maximum of power:
|
|
// `generate([options])`
|
|
// Callback approach, for ease of use:
|
|
// `generate([options], callback)`
|
|
// ## Source Code
|
module.exports = function() {
|
var callback, data, generator, options;
|
if (arguments.length === 2) {
|
options = arguments[0];
|
callback = arguments[1];
|
} else if (arguments.length === 1) {
|
if (typeof arguments[0] === 'function') {
|
options = {};
|
callback = arguments[0];
|
} else {
|
options = arguments[0];
|
}
|
} else if (arguments.length === 0) {
|
options = {};
|
}
|
generator = new Generator(options);
|
if (callback) {
|
data = [];
|
generator.on('readable', function() {
|
var d, results;
|
results = [];
|
while (d = generator.read()) {
|
results.push(data.push(d));
|
}
|
return results;
|
});
|
generator.on('error', callback);
|
generator.on('end', function() {
|
if (!generator.options.objectMode) {
|
if (generator.options.encoding) {
|
data = data.join('');
|
} else {
|
data = Buffer.concat(data);
|
}
|
}
|
return callback(null, data);
|
});
|
}
|
return generator;
|
};
|
|
// ## `Generator([options])`
|
|
// Feel free to ask for new features and to participate by writting issues and preparing push requests.
|
|
// Options are documented [here](http://csv.js.org/generate/options/).
|
Generator = function(options = {}) {
|
var accepted_header_types, base, base1, base10, base11, base2, base3, base4, base5, base6, base7, base8, base9, i, j, k, len, ref, v;
|
if (options.high_water_mark) {
|
// Convert Stream Readable options if underscored
|
options.highWaterMark = options.high_water_mark;
|
}
|
if (options.object_mode) {
|
options.objectMode = options.object_mode;
|
}
|
// Call parent constructor
|
stream.Readable.call(this, options);
|
// Clone and camelize options
|
this.options = {};
|
for (k in options) {
|
v = options[k];
|
this.options[Generator.camelize(k)] = v;
|
}
|
// Normalize options
|
if ((base = this.options).columns == null) {
|
base.columns = 8;
|
}
|
if ((base1 = this.options).delimiter == null) {
|
base1.delimiter = ',';
|
}
|
if ((base2 = this.options).duration == null) {
|
base2.duration = null;
|
}
|
if ((base3 = this.options).encoding == null) {
|
base3.encoding = null;
|
}
|
if ((base4 = this.options).end == null) {
|
base4.end = null;
|
}
|
if ((base5 = this.options).eof == null) {
|
base5.eof = false;
|
}
|
if ((base6 = this.options).fixedSize == null) {
|
base6.fixedSize = false;
|
}
|
if ((base7 = this.options).length == null) {
|
base7.length = -1;
|
}
|
if ((base8 = this.options).maxWordLength == null) {
|
base8.maxWordLength = 16;
|
}
|
if ((base9 = this.options).rowDelimiter == null) {
|
base9.rowDelimiter = '\n';
|
}
|
if ((base10 = this.options).seed == null) {
|
base10.seed = false;
|
}
|
if ((base11 = this.options).sleep == null) {
|
base11.sleep = 0;
|
}
|
if (this.options.eof === true) {
|
// Default values
|
this.options.eof = this.options.rowDelimiter;
|
}
|
// State
|
this._ = {
|
start_time: this.options.duration ? Date.now() : null,
|
fixed_size_buffer: '',
|
count_written: 0,
|
count_created: 0
|
};
|
if (typeof this.options.columns === 'number') {
|
this.options.columns = new Array(this.options.columns);
|
}
|
accepted_header_types = Object.keys(Generator).filter(function(t) {
|
return t !== 'super_' && t !== 'camelize';
|
});
|
ref = this.options.columns;
|
for (i = j = 0, len = ref.length; j < len; i = ++j) {
|
v = ref[i];
|
if (v == null) {
|
v = 'ascii';
|
}
|
if (typeof v === 'string') {
|
if (indexOf.call(accepted_header_types, v) < 0) {
|
throw Error(`Invalid column type: got "${v}", default values are ${JSON.stringify(accepted_header_types)}`);
|
}
|
this.options.columns[i] = Generator[v];
|
}
|
}
|
return this;
|
};
|
|
util.inherits(Generator, stream.Readable);
|
|
module.exports.Generator = Generator;
|
|
// ## `Generator.prototype.random()`
|
|
// Generate a random number between 0 and 1 with 2 decimals. The function is idempotent if it detect the "seed" option.
|
Generator.prototype.random = function() {
|
if (this.options.seed) {
|
return this.options.seed = this.options.seed * Math.PI * 100 % 100 / 100;
|
} else {
|
return Math.random();
|
}
|
};
|
|
// ## `Generator.prototype.end()`
|
|
// Stop the generation.
|
Generator.prototype.end = function() {
|
return this.push(null);
|
};
|
|
// ## `Generator.prototype._read(size)`
|
|
// Put new data into the read queue.
|
Generator.prototype._read = function(size) {
|
var column, data, header, j, l, len, len1, len2, len3, length, line, lineLength, m, n, ref;
|
// Already started
|
data = [];
|
length = this._.fixed_size_buffer.length;
|
if (length) {
|
data.push(this._.fixed_size_buffer);
|
}
|
while (true) {
|
// Time for some rest: flush first and stop later
|
if ((this._.count_created === this.options.length) || (this.options.end && Date.now() > this.options.end) || (this.options.duration && Date.now() > this._.start_time + this.options.duration)) {
|
// Flush
|
if (data.length) {
|
if (this.options.objectMode) {
|
for (j = 0, len = data.length; j < len; j++) {
|
line = data[j];
|
this.__push(line);
|
}
|
} else {
|
this.__push(data.join('') + (this.options.eof ? this.options.eof : ''));
|
}
|
}
|
// Stop
|
return this.push(null);
|
}
|
// Create the line
|
line = [];
|
ref = this.options.columns;
|
for (l = 0, len1 = ref.length; l < len1; l++) {
|
header = ref[l];
|
// Create the field
|
line.push(`${header(this)}`);
|
}
|
// Obtain line length
|
if (this.options.objectMode) {
|
lineLength = 0;
|
for (m = 0, len2 = line.length; m < len2; m++) {
|
column = line[m];
|
lineLength += column.length;
|
}
|
} else {
|
// Stringify the line
|
line = `${(this._.count_created === 0 ? '' : this.options.rowDelimiter)}${line.join(this.options.delimiter)}`;
|
lineLength = line.length;
|
}
|
this._.count_created++;
|
if (length + lineLength > size) {
|
if (this.options.objectMode) {
|
data.push(line);
|
for (n = 0, len3 = data.length; n < len3; n++) {
|
line = data[n];
|
this.__push(line);
|
}
|
} else {
|
if (this.options.fixedSize) {
|
this._.fixed_size_buffer = line.substr(size - length);
|
data.push(line.substr(0, size - length));
|
} else {
|
data.push(line);
|
}
|
this.__push(data.join(''));
|
}
|
break;
|
}
|
length += lineLength;
|
data.push(line);
|
}
|
};
|
|
// ## `Generator.prototype._read(size)`
|
|
// Put new data into the read queue.
|
Generator.prototype.__push = function(record) {
|
this._.count_written++;
|
if (this.options.sleep > 0) {
|
return setTimeout(() => {
|
return this.push(record);
|
}, this.options.sleep);
|
} else {
|
return this.push(record);
|
}
|
};
|
|
// ## `Generator.ascii(gen)`
|
|
// Generate an ASCII value.
|
Generator.ascii = function(gen) {
|
var _, char, column, j, nb_chars, ref;
|
// Column
|
column = [];
|
nb_chars = Math.ceil(gen.random() * gen.options.maxWordLength);
|
for (_ = j = 0, ref = nb_chars; (0 <= ref ? j < ref : j > ref); _ = 0 <= ref ? ++j : --j) {
|
char = Math.floor(gen.random() * 32);
|
column.push(String.fromCharCode(char + (char < 16 ? 65 : 97 - 16)));
|
}
|
return column.join('');
|
};
|
|
// ## `Generator.ascii(gen)`
|
|
// Generate an integer value.
|
Generator.int = function(gen) {
|
return Math.floor(gen.random() * Math.pow(2, 52));
|
};
|
|
// ## `Generator.bool(gen)`
|
|
// Generate an boolean value.
|
Generator.bool = function(gen) {
|
return Math.floor(gen.random() * 2);
|
};
|
|
// ## `Generator.camelize`
|
Generator.camelize = function(str) {
|
return str.replace(/_([a-z])/gi, function(_, match, index) {
|
return match.toUpperCase();
|
});
|
};
|
