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/**
* Parses a given string "foo needle[option1;option2=value;option3=42;option4=false] bar"
* into the following structure:
*
* {option1: true, option2: "value", option3: 42, option4: false}
*/
function parseOptions(string, needle) {
var temp = needle ? string.match(/\w+\[(.*?)\]/g) || [] : [string],
options = {};
temp.forEach(function(slice) {
if (needle && (slice.indexOf(needle) !== 0 || slice === needle)) {
return;
}
var split = needle ? slice.replace(/^\w+\[(.*)\]$/, '$1') : slice,
index = '',
value = '',
inval = false,
escaped = 0,
inquotes = false,
l = split.length,
token,
write,
skip,
i;
for (i = 0; i < l; i += 1) {
token = split[i];
write = false;
skip = false;
if (inval && token === '\\' && escaped <= 0) {
escaped = 2;
} else if (!inval && token === '=') {
inval = true;
skip = true;
} else if (inval && value.length === 0 && (token === '"' || token === "'")) {
inquotes = token;
} else if (inval && inquotes && escaped <= 0 && token === inquotes) {
inquotes = false;
} else if (!inquotes && token === ';') {
write = true;
skip = true;
}
if (!skip && escaped <= 0) {
if (inval) {
value += token;
} else {
index += token;
}
}
escaped -= 1;
if (write || i === split.length - 1) {
if (i === split.length - 1 && inquotes) {
throw 'Invalid data, missing closing quote';
}
if (index.trim().length > 0) {
options[index.trim()] = inval ? parseValue(value) : true;
}
inval = false;
inquotes = false;
index = '';
value = '';
}
}
});
return options;
}
/**
* Tries to parse a given string into it's appropriate type.
* Supports boolean, int and float.
*/
function parseValue(value) {
if (value.toLowerCase() === 'true') {
return true;
}
if (value.toLowerCase() === 'false') {
return false;
}
if (/^[+-]\d+$/.test(value)) {
return parseInt(value, 10);
}
if (/^[+-]\d+\.\d+$/.test(value)) {
return parseFloat(value, 10);
}
return value.replace(/^(["'])(.*)\1$/, '$2');
}
export default parseOptions;
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