/**
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2016
 * @license Apache-2.0
 */

import Operation from "../Operation";
import Utils from "../Utils";

/**
 * To HTML Entity operation
 */
class ToHTMLEntity extends Operation {

    /**
     * ToHTMLEntity constructor
     */
    constructor() {
        super();

        this.name = "To HTML Entity";
        this.module = "Default";
        this.description = "Converts characters to HTML entities<br><br>e.g. <code>&amp;</code> becomes <code>&amp;<span>amp;</span></code>";
        this.infoURL = "https://wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references";
        this.inputType = "string";
        this.outputType = "string";
        this.args = [
            {
                "name": "Convert all characters",
                "type": "boolean",
                "value": false
            },
            {
                "name": "Convert to",
                "type": "option",
                "value": ["Named entities where possible", "Numeric entities", "Hex entities"]
            }
        ];
    }

    /**
     * @param {string} input
     * @param {Object[]} args
     * @returns {string}
     */
    run(input, args) {
        const convertAll = args[0],
            numeric = args[1] === "Numeric entities",
            hexa = args[1] === "Hex entities";

        const charcodes = Utils.strToCharcode(input);
        let output = "";

        for (let i = 0; i < charcodes.length; i++) {
            if (convertAll && numeric) {
                output += "&#" + charcodes[i] + ";";
            } else if (convertAll && hexa) {
                output += "&#x" + Utils.hex(charcodes[i]) + ";";
            } else if (convertAll) {
                output += byteToEntity[charcodes[i]] || "&#" + charcodes[i] + ";";
            } else if (numeric) {
                if (charcodes[i] > 255 || byteToEntity.hasOwnProperty(charcodes[i])) {
                    output += "&#" + charcodes[i] + ";";
                } else {
                    output += Utils.chr(charcodes[i]);
                }
            } else if (hexa) {
                if (charcodes[i] > 255 || byteToEntity.hasOwnProperty(charcodes[i])) {
                    output += "&#x" + Utils.hex(charcodes[i]) + ";";
                } else {
                    output += Utils.chr(charcodes[i]);
                }
            } else {
                output += byteToEntity[charcodes[i]] || (
                    charcodes[i] > 255 ?
                        "&#" + charcodes[i] + ";" :
                        Utils.chr(charcodes[i])
                );
            }
        }
        return output;
    }

}

/**
 * Lookup table to translate byte values to their HTML entity codes.
 */
const byteToEntity = {
    34: "&quot;",
    38: "&amp;",
    39: "&apos;",
    60: "&lt;",
    62: "&gt;",
    160: "&nbsp;",
    161: "&iexcl;",
    162: "&cent;",
    163: "&pound;",
    164: "&curren;",
    165: "&yen;",
    166: "&brvbar;",
    167: "&sect;",
    168: "&uml;",
    169: "&copy;",
    170: "&ordf;",
    171: "&laquo;",
    172: "&not;",
    173: "&shy;",
    174: "&reg;",
    175: "&macr;",
    176: "&deg;",
    177: "&plusmn;",
    178: "&sup2;",
    179: "&sup3;",
    180: "&acute;",
    181: "&micro;",
    182: "&para;",
    183: "&middot;",
    184: "&cedil;",
    185: "&sup1;",
    186: "&ordm;",
    187: "&raquo;",
    188: "&frac14;",
    189: "&frac12;",
    190: "&frac34;",
    191: "&iquest;",
    192: "&Agrave;",
    193: "&Aacute;",
    194: "&Acirc;",
    195: "&Atilde;",
    196: "&Auml;",
    197: "&Aring;",
    198: "&AElig;",
    199: "&Ccedil;",
    200: "&Egrave;",
    201: "&Eacute;",
    202: "&Ecirc;",
    203: "&Euml;",
    204: "&Igrave;",
    205: "&Iacute;",
    206: "&Icirc;",
    207: "&Iuml;",
    208: "&ETH;",
    209: "&Ntilde;",
    210: "&Ograve;",
    211: "&Oacute;",
    212: "&Ocirc;",
    213: "&Otilde;",
    214: "&Ouml;",
    215: "&times;",
    216: "&Oslash;",
    217: "&Ugrave;",
    218: "&Uacute;",
    219: "&Ucirc;",
    220: "&Uuml;",
    221: "&Yacute;",
    222: "&THORN;",
    223: "&szlig;",
    224: "&agrave;",
    225: "&aacute;",
    226: "&acirc;",
    227: "&atilde;",
    228: "&auml;",
    229: "&aring;",
    230: "&aelig;",
    231: "&ccedil;",
    232: "&egrave;",
    233: "&eacute;",
    234: "&ecirc;",
    235: "&euml;",
    236: "&igrave;",
    237: "&iacute;",
    238: "&icirc;",
    239: "&iuml;",
    240: "&eth;",
    241: "&ntilde;",
    242: "&ograve;",
    243: "&oacute;",
    244: "&ocirc;",
    245: "&otilde;",
    246: "&ouml;",
    247: "&divide;",
    248: "&oslash;",
    249: "&ugrave;",
    250: "&uacute;",
    251: "&ucirc;",
    252: "&uuml;",
    253: "&yacute;",
    254: "&thorn;",
    255: "&yuml;",
    338: "&OElig;",
    339: "&oelig;",
    352: "&Scaron;",
    353: "&scaron;",
    376: "&Yuml;",
    402: "&fnof;",
    710: "&circ;",
    732: "&tilde;",
    913: "&Alpha;",
    914: "&Beta;",
    915: "&Gamma;",
    916: "&Delta;",
    917: "&Epsilon;",
    918: "&Zeta;",
    919: "&Eta;",
    920: "&Theta;",
    921: "&Iota;",
    922: "&Kappa;",
    923: "&Lambda;",
    924: "&Mu;",
    925: "&Nu;",
    926: "&Xi;",
    927: "&Omicron;",
    928: "&Pi;",
    929: "&Rho;",
    931: "&Sigma;",
    932: "&Tau;",
    933: "&Upsilon;",
    934: "&Phi;",
    935: "&Chi;",
    936: "&Psi;",
    937: "&Omega;",
    945: "&alpha;",
    946: "&beta;",
    947: "&gamma;",
    948: "&delta;",
    949: "&epsilon;",
    950: "&zeta;",
    951: "&eta;",
    952: "&theta;",
    953: "&iota;",
    954: "&kappa;",
    955: "&lambda;",
    956: "&mu;",
    957: "&nu;",
    958: "&xi;",
    959: "&omicron;",
    960: "&pi;",
    961: "&rho;",
    962: "&sigmaf;",
    963: "&sigma;",
    964: "&tau;",
    965: "&upsilon;",
    966: "&phi;",
    967: "&chi;",
    968: "&psi;",
    969: "&omega;",
    977: "&thetasym;",
    978: "&upsih;",
    982: "&piv;",
    8194: "&ensp;",
    8195: "&emsp;",
    8201: "&thinsp;",
    8204: "&zwnj;",
    8205: "&zwj;",
    8206: "&lrm;",
    8207: "&rlm;",
    8211: "&ndash;",
    8212: "&mdash;",
    8216: "&lsquo;",
    8217: "&rsquo;",
    8218: "&sbquo;",
    8220: "&ldquo;",
    8221: "&rdquo;",
    8222: "&bdquo;",
    8224: "&dagger;",
    8225: "&Dagger;",
    8226: "&bull;",
    8230: "&hellip;",
    8240: "&permil;",
    8242: "&prime;",
    8243: "&Prime;",
    8249: "&lsaquo;",
    8250: "&rsaquo;",
    8254: "&oline;",
    8260: "&frasl;",
    8364: "&euro;",
    8465: "&image;",
    8472: "&weierp;",
    8476: "&real;",
    8482: "&trade;",
    8501: "&alefsym;",
    8592: "&larr;",
    8593: "&uarr;",
    8594: "&rarr;",
    8595: "&darr;",
    8596: "&harr;",
    8629: "&crarr;",
    8656: "&lArr;",
    8657: "&uArr;",
    8658: "&rArr;",
    8659: "&dArr;",
    8660: "&hArr;",
    8704: "&forall;",
    8706: "&part;",
    8707: "&exist;",
    8709: "&empty;",
    8711: "&nabla;",
    8712: "&isin;",
    8713: "&notin;",
    8715: "&ni;",
    8719: "&prod;",
    8721: "&sum;",
    8722: "&minus;",
    8727: "&lowast;",
    8730: "&radic;",
    8733: "&prop;",
    8734: "&infin;",
    8736: "&ang;",
    8743: "&and;",
    8744: "&or;",
    8745: "&cap;",
    8746: "&cup;",
    8747: "&int;",
    8756: "&there4;",
    8764: "&sim;",
    8773: "&cong;",
    8776: "&asymp;",
    8800: "&ne;",
    8801: "&equiv;",
    8804: "&le;",
    8805: "&ge;",
    8834: "&sub;",
    8835: "&sup;",
    8836: "&nsub;",
    8838: "&sube;",
    8839: "&supe;",
    8853: "&oplus;",
    8855: "&otimes;",
    8869: "&perp;",
    8901: "&sdot;",
    8942: "&vellip;",
    8968: "&lceil;",
    8969: "&rceil;",
    8970: "&lfloor;",
    8971: "&rfloor;",
    9001: "&lang;",
    9002: "&rang;",
    9674: "&loz;",
    9824: "&spades;",
    9827: "&clubs;",
    9829: "&hearts;",
    9830: "&diams;",
};

export default ToHTMLEntity;