/**
* Sequence utility operations.
*
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*
* @namespace
*/
var SeqUtils = {
/**
* @constant
* @default
*/
DELIMITER_OPTIONS: ["Line feed", "CRLF", "Space", "Comma", "Semi-colon", "Colon", "Nothing (separate chars)"],
/**
* @constant
* @default
*/
SORT_REVERSE: false,
/**
* @constant
* @default
*/
SORT_ORDER: ["Alphabetical (case sensitive)", "Alphabetical (case insensitive)", "IP address"],
/**
* Sort operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run_sort: function (input, args) {
var delim = Utils.char_rep[args[0]],
sort_reverse = args[1],
order = args[2],
sorted = input.split(delim);
if (order == "Alphabetical (case sensitive)") {
sorted = sorted.sort();
} else if (order == "Alphabetical (case insensitive)") {
sorted = sorted.sort(SeqUtils._case_insensitive_sort);
} else if (order == "IP address") {
sorted = sorted.sort(SeqUtils._ip_sort);
}
if (sort_reverse) sorted.reverse();
return sorted.join(delim);
},
/**
* Unique operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run_unique: function (input, args) {
var delim = Utils.char_rep[args[0]];
return input.split(delim).unique().join(delim);
},
/**
* @constant
* @default
*/
SEARCH_TYPE: ["Regex", "Extended (\\n, \\t, \\x...)", "Simple string"],
/**
* Count occurrences operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {number}
*/
run_count: function(input, args) {
var search = args[0].string,
type = args[0].option;
if (type == "Regex" && search) {
try {
var regex = new RegExp(search, "gi"),
matches = input.match(regex);
return matches.length;
} catch(err) {
return 0;
}
} else if (search) {
if (type.indexOf("Extended") === 0) {
search = Utils.parse_escaped_chars(search);
}
return input.count(search);
} else {
return 0;
}
},
/**
* @constant
* @default
*/
REVERSE_BY: ["Character", "Line"],
/**
* Reverse operation.
*
* @param {byte_array} input
* @param {Object[]} args
* @returns {byte_array}
*/
run_reverse: function (input, args) {
if (args[0] == "Line") {
var lines = [],
line = [],
result = [];
for (var i = 0; i < input.length; i++) {
if (input[i] == 0x0a) {
lines.push(line);
line = [];
} else {
line.push(input[i]);
}
}
lines.push(line);
lines.reverse();
for (i = 0; i < lines.length; i++) {
result = result.concat(lines[i]);
result.push(0x0a);
}
return result.slice(0, input.length);
} else {
return input.reverse();
}
},
/**
* Add line numbers operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run_add_line_numbers: function(input, args) {
var lines = input.split("\n"),
output = "",
width = lines.length.toString().length;
for (var n = 0; n < lines.length; n++) {
output += Utils.pad((n+1).toString(), width, " ") + " " + lines[n] + "\n";
}
return output.slice(0, output.length-1);
},
/**
* Remove line numbers operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run_remove_line_numbers: function(input, args) {
return input.replace(/^[ \t]{0,5}\d+[\s:|\-,.)\]]/gm, "");
},
/**
* Expand alphabet range operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run_expand_alph_range: function(input, args) {
return Utils.expand_alph_range(input).join(args[0]);
},
/**
* Comparison operation for sorting of strings ignoring case.
*
* @private
* @param {string} a
* @param {string} b
* @returns {number}
*/
_case_insensitive_sort: function(a, b) {
return a.toLowerCase().localeCompare(b.toLowerCase());
},
/**
* Comparison operation for sorting of IPv4 addresses.
*
* @private
* @param {string} a
* @param {string} b
* @returns {number}
*/
_ip_sort: function(a, b) {
var a_ = a.split("."),
b_ = b.split(".");
a_ = a_[0] * 0x1000000 + a_[1] * 0x10000 + a_[2] * 0x100 + a_[3] * 1;
b_ = b_[0] * 0x1000000 + b_[1] * 0x10000 + b_[2] * 0x100 + b_[3] * 1;
if (isNaN(a_) && !isNaN(b_)) return 1;
if (!isNaN(a_) && isNaN(b_)) return -1;
if (isNaN(a_) && isNaN(b_)) return a.localeCompare(b);
return a_ - b_;
},
};
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