Current File : /home/opti/workflow/node_modules/addressparser/src/addressparser.js
'use strict';
// expose to the world
module.exports = addressparser;
/**
* Parses structured e-mail addresses from an address field
*
* Example:
*
* 'Name <address@domain>'
*
* will be converted to
*
* [{name: 'Name', address: 'address@domain'}]
*
* @param {String} str Address field
* @return {Array} An array of address objects
*/
function addressparser(str) {
var tokenizer = new Tokenizer(str),
tokens = tokenizer.tokenize();
var addresses = [],
address = [],
parsedAddresses = [];
tokens.forEach(function(token) {
if (token.type === 'operator' && (token.value === ',' || token.value === ';')) {
if (address.length) {
addresses.push(address);
}
address = [];
} else {
address.push(token);
}
});
if (address.length) {
addresses.push(address);
}
addresses.forEach(function(address) {
address = _handleAddress(address);
if (address.length) {
parsedAddresses = parsedAddresses.concat(address);
}
});
return parsedAddresses;
}
/**
* Converts tokens for a single address into an address object
*
* @param {Array} tokens Tokens object
* @return {Object} Address object
*/
function _handleAddress(tokens) {
var token,
isGroup = false,
state = 'text',
address,
addresses = [],
data = {
address: [],
comment: [],
group: [],
text: []
},
i, len;
// Filter out <addresses>, (comments) and regular text
for (i = 0, len = tokens.length; i < len; i++) {
token = tokens[i];
if (token.type === 'operator') {
switch (token.value) {
case '<':
state = 'address';
break;
case '(':
state = 'comment';
break;
case ':':
state = 'group';
isGroup = true;
break;
default:
state = 'text';
}
} else {
if (token.value) {
data[state].push(token.value);
}
}
}
// If there is no text but a comment, replace the two
if (!data.text.length && data.comment.length) {
data.text = data.comment;
data.comment = [];
}
if (isGroup) {
// http://tools.ietf.org/html/rfc2822#appendix-A.1.3
data.text = data.text.join(' ');
addresses.push({
name: data.text || (address && address.name),
group: data.group.length ? addressparser(data.group.join(',')) : []
});
} else {
// If no address was found, try to detect one from regular text
if (!data.address.length && data.text.length) {
for (i = data.text.length - 1; i >= 0; i--) {
if (data.text[i].match(/^[^@\s]+@[^@\s]+$/)) {
data.address = data.text.splice(i, 1);
break;
}
}
var _regexHandler = function(address) {
if (!data.address.length) {
data.address = [address.trim()];
return ' ';
} else {
return address;
}
};
// still no address
if (!data.address.length) {
for (i = data.text.length - 1; i >= 0; i--) {
data.text[i] = data.text[i].replace(/\s*\b[^@\s]+@[^@\s]+\b\s*/, _regexHandler).trim();
if (data.address.length) {
break;
}
}
}
}
// If there's still is no text but a comment exixts, replace the two
if (!data.text.length && data.comment.length) {
data.text = data.comment;
data.comment = [];
}
// Keep only the first address occurence, push others to regular text
if (data.address.length > 1) {
data.text = data.text.concat(data.address.splice(1));
}
// Join values with spaces
data.text = data.text.join(' ');
data.address = data.address.join(' ');
if (!data.address && isGroup) {
return [];
} else {
address = {
address: data.address || data.text || '',
name: data.text || data.address || ''
};
if (address.address === address.name) {
if ((address.address || '').match(/@/)) {
address.name = '';
} else {
address.address = '';
}
}
addresses.push(address);
}
}
return addresses;
}
/**
* Creates a Tokenizer object for tokenizing address field strings
*
* @constructor
* @param {String} str Address field string
*/
function Tokenizer(str) {
this.str = (str || '').toString();
this.operatorCurrent = '';
this.operatorExpecting = '';
this.node = null;
this.escaped = false;
this.list = [];
}
/**
* Operator tokens and which tokens are expected to end the sequence
*/
Tokenizer.prototype.operators = {
'"': '"',
'(': ')',
'<': '>',
',': '',
':': ';',
// Semicolons are not a legal delimiter per the RFC2822 grammar other
// than for terminating a group, but they are also not valid for any
// other use in this context. Given that some mail clients have
// historically allowed the semicolon as a delimiter equivalent to the
// comma in their UI, it makes sense to treat them the same as a comma
// when used outside of a group.
';': ''
};
/**
* Tokenizes the original input string
*
* @return {Array} An array of operator|text tokens
*/
Tokenizer.prototype.tokenize = function() {
var chr, list = [];
for (var i = 0, len = this.str.length; i < len; i++) {
chr = this.str.charAt(i);
this.checkChar(chr);
}
this.list.forEach(function(node) {
node.value = (node.value || '').toString().trim();
if (node.value) {
list.push(node);
}
});
return list;
};
/**
* Checks if a character is an operator or text and acts accordingly
*
* @param {String} chr Character from the address field
*/
Tokenizer.prototype.checkChar = function(chr) {
if ((chr in this.operators || chr === '\\') && this.escaped) {
this.escaped = false;
} else if (this.operatorExpecting && chr === this.operatorExpecting) {
this.node = {
type: 'operator',
value: chr
};
this.list.push(this.node);
this.node = null;
this.operatorExpecting = '';
this.escaped = false;
return;
} else if (!this.operatorExpecting && chr in this.operators) {
this.node = {
type: 'operator',
value: chr
};
this.list.push(this.node);
this.node = null;
this.operatorExpecting = this.operators[chr];
this.escaped = false;
return;
}
if (!this.escaped && chr === '\\') {
this.escaped = true;
return;
}
if (!this.node) {
this.node = {
type: 'text',
value: ''
};
this.list.push(this.node);
}
if (this.escaped && chr !== '\\') {
this.node.value += '\\';
}
this.node.value += chr;
this.escaped = false;
};
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