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'use strict';
var path = require('path');
var replace = require('replace-ext');
var buffer = require('is-buffer');
module.exports = VFile;
var own = {}.hasOwnProperty;
var proto = VFile.prototype;
proto.toString = toString;
/* Order of setting (least specific to most), we need this because
* otherwise `{stem: 'a', path: '~/b.js'}` would throw, as a path
* is needed before a stem can be set. */
var order = [
'history',
'path',
'basename',
'stem',
'extname',
'dirname'
];
/* Construct a new file. */
function VFile(options) {
var prop;
var index;
var length;
if (!options) {
options = {};
} else if (typeof options === 'string' || buffer(options)) {
options = {contents: options};
} else if ('message' in options && 'messages' in options) {
return options;
}
if (!(this instanceof VFile)) {
return new VFile(options);
}
this.data = {};
this.messages = [];
this.history = [];
this.cwd = process.cwd();
/* Set path related properties in the correct order. */
index = -1;
length = order.length;
while (++index < length) {
prop = order[index];
if (own.call(options, prop)) {
this[prop] = options[prop];
}
}
/* Set non-path related properties. */
for (prop in options) {
if (order.indexOf(prop) === -1) {
this[prop] = options[prop];
}
}
}
/* Access full path (`~/index.min.js`). */
Object.defineProperty(proto, 'path', {
get: function () {
return this.history[this.history.length - 1];
},
set: function (path) {
assertNonEmpty(path, 'path');
if (path !== this.path) {
this.history.push(path);
}
}
});
/* Access parent path (`~`). */
Object.defineProperty(proto, 'dirname', {
get: function () {
return typeof this.path === 'string' ? path.dirname(this.path) : undefined;
},
set: function (dirname) {
assertPath(this.path, 'dirname');
this.path = path.join(dirname || '', this.basename);
}
});
/* Access basename (`index.min.js`). */
Object.defineProperty(proto, 'basename', {
get: function () {
return typeof this.path === 'string' ? path.basename(this.path) : undefined;
},
set: function (basename) {
assertNonEmpty(basename, 'basename');
assertPart(basename, 'basename');
this.path = path.join(this.dirname || '', basename);
}
});
/* Access extname (`.js`). */
Object.defineProperty(proto, 'extname', {
get: function () {
return typeof this.path === 'string' ? path.extname(this.path) : undefined;
},
set: function (extname) {
var ext = extname || '';
assertPart(ext, 'extname');
assertPath(this.path, 'extname');
if (ext) {
if (ext.charAt(0) !== '.') {
throw new Error('`extname` must start with `.`');
}
if (ext.indexOf('.', 1) !== -1) {
throw new Error('`extname` cannot contain multiple dots');
}
}
this.path = replace(this.path, ext);
}
});
/* Access stem (`index.min`). */
Object.defineProperty(proto, 'stem', {
get: function () {
return typeof this.path === 'string' ? path.basename(this.path, this.extname) : undefined;
},
set: function (stem) {
assertNonEmpty(stem, 'stem');
assertPart(stem, 'stem');
this.path = path.join(this.dirname || '', stem + (this.extname || ''));
}
});
/* Get the value of the file. */
function toString(encoding) {
var value = this.contents || '';
return buffer(value) ? value.toString(encoding) : String(value);
}
/* Assert that `part` is not a path (i.e., does
* not contain `path.sep`). */
function assertPart(part, name) {
if (part.indexOf(path.sep) !== -1) {
throw new Error('`' + name + '` cannot be a path: did not expect `' + path.sep + '`');
}
}
/* Assert that `part` is not empty. */
function assertNonEmpty(part, name) {
if (!part) {
throw new Error('`' + name + '` cannot be empty');
}
}
/* Assert `path` exists. */
function assertPath(path, name) {
if (!path) {
throw new Error('Setting `' + name + '` requires `path` to be set too');
}
}
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