///////////////////////////////////////////////////////////////////////////

// SIMPLISTIC CODE SCANNING

// This textual code scan just scans coffeescript and javascript code,

// looking for object names and

///////////////////////////////////////////////////////////////////////////

function stripCSMultiline(code) {

// Really simple heuristic for coffeescript:

// Just scan the multiline quote and comment delimeters, and

// omit parts of the code within those when scanning.

var parts = code.split(/(###|\/\/\/|"""|'''|#|\n)/);

var keep = [],

inside = null,

hadline = false,

ignoreline = false;

for (var j = 0; j < parts.length; ++j) {

var part = parts[j];

if (ignoreline) {

if (part === '\n') {

ignoreline = false;

} else {

continue;

}

}

if (inside) {

if (part === '\n' && !hadline) {

hadline = true;

keep.push(part);

}

if (part === inside) {

hadline = false;

part = null;

}

continue;

}

if (part === '#') {

ignoreline = true;

continue;

}

if (/^(?:###|"""|'''|\/\/\/)$/.test(part)) {

inside = part;

continue;

}

keep.push(part);

}

return keep.join('');

}

function coffeeObjects(code) {

code = stripCSMultiline(code);

var lines = code.split('\n');

var result = [];

for (var j = 0; j < lines.length; ++j) {

var match = /^\s*(\w+)\s*=\s*new\s+(\w+)(.*)$/.exec(lines[j]);

if (match) {

result.push({

name: match[1],

class: match[2],

args: (match[3] || '').replace(/\((.*)\)\s*/, '$1').split(',').map(

function(t) { return t.trim(); })

});

}

}

return result;

}

function jsObjects(code) {

var lines = code.split('\n');

var result = [];

for (var j = 0; j < lines.length; ++j) {

var match = /^\s*(\w+)\s*=\s*new\s+(\w+)(.*)$/.exec(lines[j]);

if (match) {

result.push({

name: match[1],

class: match[2],

args: (match[3] || '').replace(/\((.*)\)\s*/, '$1').split(',').map(

function(t) { return t.trim(); })

});

}

}

return result;

}

function scanObjects(language, code) {

var objects;

if (/coffee/.test(language)) {

objects = coffeeObjects(code);

} else if (/js|javascript/.test(language)) {

objects = jsObjects(code);

} else {

return [];

}

var deduped = {};

for (var j = 0; j < objects.length; ++j) {

var obj = objects[j];

if (/^(?:Turtle|Sprite|Piano|Webcam|Pencil)$/.test(obj.class) &&

!(obj.name in deduped)) {

deduped[obj.name] = obj;

}

}

var result = [];

for (var n in deduped) {

var obj = deduped[n];

result.push({

label: obj.class + ' ' + obj.name,

name: obj.name

});

}

return result;

}

window.pencilcode.codescan = {

scanObjects: scanObjects

};

module.exports = window.pencilcode.codescan;