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pouch.alpha.js
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pouch.alpha.js
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a,b=f.timers,c=0;for(;c<b.length;c++)a=b[c],!a()&&b[c]===a&&b.splice(c--,1);b.length||f.fx.stop()},interval:13,stop:function(){clearInterval(cp),cp=null},speeds:{slow:600,fast:200,_default:400},step:{opacity:function(a){f.style(a.elem,"opacity",a.now)},_default:function(a){a.elem.style&&a.elem.style[a.prop]!=null?a.elem.style[a.prop]=a.now+a.unit:a.elem[a.prop]=a.now}}}),f.each(["width","height"],function(a,b){f.fx.step[b]=function(a){f.style(a.elem,b,Math.max(0,a.now)+a.unit)}}),f.expr&&f.expr.filters&&(f.expr.filters.animated=function(a){return f.grep(f.timers,function(b){return a===b.elem}).length});var cw=/^t(?:able|d|h)$/i,cx=/^(?:body|html)$/i;"getBoundingClientRect"in c.documentElement?f.fn.offset=function(a){var b=this[0],c;if(a)return this.each(function(b){f.offset.setOffset(this,a,b)});if(!b||!b.ownerDocument)return null;if(b===b.ownerDocument.body)return f.offset.bodyOffset(b);try{c=b.getBoundingClientRect()}catch(d){}var e=b.ownerDocument,g=e.documentElement;if(!c||!f.contains(g,b))return c?{top:c.top,left:c.left}:{top:0,left:0};var h=e.body,i=cy(e),j=g.clientTop||h.clientTop||0,k=g.clientLeft||h.clientLeft||0,l=i.pageYOffset||f.support.boxModel&&g.scrollTop||h.scrollTop,m=i.pageXOffset||f.support.boxModel&&g.scrollLeft||h.scrollLeft,n=c.top+l-j,o=c.left+m-k;return{top:n,left:o}}:f.fn.offset=function(a){var b=this[0];if(a)return this.each(function(b){f.offset.setOffset(this,a,b)});if(!b||!b.ownerDocument)return null;if(b===b.ownerDocument.body)return f.offset.bodyOffset(b);var c,d=b.offsetParent,e=b,g=b.ownerDocument,h=g.documentElement,i=g.body,j=g.defaultView,k=j?j.getComputedStyle(b,null):b.currentStyle,l=b.offsetTop,m=b.offsetLeft;while((b=b.parentNode)&&b!==i&&b!==h){if(f.support.fixedPosition&&k.position==="fixed")break;c=j?j.getComputedStyle(b,null):b.currentStyle,l-=b.scrollTop,m-=b.scrollLeft,b===d&&(l+=b.offsetTop,m+=b.offsetLeft,f.support.doesNotAddBorder&&(!f.support.doesAddBorderForTableAndCells||!cw.test(b.nodeName))&&(l+=parseFloat(c.borderTopWidth)||0,m+=parseFloat(c.borderLeftWidth)||0),e=d,d=b.offsetParent),f.support.subtractsBorderForOverflowNotVisible&&c.overflow!=="visible"&&(l+=parseFloat(c.borderTopWidth)||0,m+=parseFloat(c.borderLeftWidth)||0),k=c}if(k.position==="relative"||k.position==="static")l+=i.offsetTop,m+=i.offsetLeft;f.support.fixedPosition&&k.position==="fixed"&&(l+=Math.max(h.scrollTop,i.scrollTop),m+=Math.max(h.scrollLeft,i.scrollLeft));return{top:l,left:m}},f.offset={bodyOffset:function(a){var b=a.offsetTop,c=a.offsetLeft;f.support.doesNotIncludeMarginInBodyOffset&&(b+=parseFloat(f.css(a,"marginTop"))||0,c+=parseFloat(f.css(a,"marginLeft"))||0);return{top:b,left:c}},setOffset:function(a,b,c){var d=f.css(a,"position");d==="static"&&(a.style.position="relative");var e=f(a),g=e.offset(),h=f.css(a,"top"),i=f.css(a,"left"),j=(d==="absolute"||d==="fixed")&&f.inArray("auto",[h,i])>-1,k={},l={},m,n;j?(l=e.position(),m=l.top,n=l.left):(m=parseFloat(h)||0,n=parseFloat(i)||0),f.isFunction(b)&&(b=b.call(a,c,g)),b.top!=null&&(k.top=b.top-g.top+m),b.left!=null&&(k.left=b.left-g.left+n),"using"in b?b.using.call(a,k):e.css(k)}},f.fn.extend({position:function(){if(!this[0])return null;var a=this[0],b=this.offsetParent(),c=this.offset(),d=cx.test(b[0].nodeName)?{top:0,left:0}:b.offset();c.top-=parseFloat(f.css(a,"marginTop"))||0,c.left-=parseFloat(f.css(a,"marginLeft"))||0,d.top+=parseFloat(f.css(b[0],"borderTopWidth"))||0,d.left+=parseFloat(f.css(b[0],"borderLeftWidth"))||0;return{top:c.top-d.top,left:c.left-d.left}},offsetParent:function(){return this.map(function(){var a=this.offsetParent||c.body;while(a&&!cx.test(a.nodeName)&&f.css(a,"position")==="static")a=a.offsetParent;return a})}}),f.each(["Left","Top"],function(a,c){var d="scroll"+c;f.fn[d]=function(c){var e,g;if(c===b){e=this[0];if(!e)return null;g=cy(e);return g?"pageXOffset"in g?g[a?"pageYOffset":"pageXOffset"]:f.support.boxModel&&g.document.documentElement[d]||g.document.body[d]:e[d]}return this.each(function(){g=cy(this),g?g.scrollTo(a?f(g).scrollLeft():c,a?c:f(g).scrollTop()):this[d]=c})}}),f.each(["Height","Width"],function(a,c){var d=c.toLowerCase();f.fn["inner"+c]=function(){var a=this[0];return a?a.style?parseFloat(f.css(a,d,"padding")):this[d]():null},f.fn["outer"+c]=function(a){var b=this[0];return b?b.style?parseFloat(f.css(b,d,a?"margin":"border")):this[d]():null},f.fn[d]=function(a){var e=this[0];if(!e)return a==null?null:this;if(f.isFunction(a))return this.each(function(b){var c=f(this);c[d](a.call(this,b,c[d]()))});if(f.isWindow(e)){var g=e.document.documentElement["client"+c],h=e.document.body;return e.document.compatMode==="CSS1Compat"&&g||h&&h["client"+c]||g}if(e.nodeType===9)return Math.max(e.documentElement["client"+c],e.body["scroll"+c],e.documentElement["scroll"+c],e.body["offset"+c],e.documentElement["offset"+c]);if(a===b){var i=f.css(e,d),j=parseFloat(i);return f.isNumeric(j)?j:i}return this.css(d,typeof a=="string"?a:a+"px")}}),a.jQuery=a.$=f,typeof define=="function"&&define.amd&&define.amd.jQuery&&define("jquery",[],function(){return f})})(window);// BEGIN Math.uuid.js
/*!
Math.uuid.js (v1.4)
http://www.broofa.com
mailto:robert@broofa.com
Copyright (c) 2010 Robert Kieffer
Dual licensed under the MIT and GPL licenses.
*/
/*
* Generate a random uuid.
*
* USAGE: Math.uuid(length, radix)
* length - the desired number of characters
* radix - the number of allowable values for each character.
*
* EXAMPLES:
* // No arguments - returns RFC4122, version 4 ID
* >>> Math.uuid()
* "92329D39-6F5C-4520-ABFC-AAB64544E172"
*
* // One argument - returns ID of the specified length
* >>> Math.uuid(15) // 15 character ID (default base=62)
* "VcydxgltxrVZSTV"
*
* // Two arguments - returns ID of the specified length, and radix. (Radix must be <= 62)
* >>> Math.uuid(8, 2) // 8 character ID (base=2)
* "01001010"
* >>> Math.uuid(8, 10) // 8 character ID (base=10)
* "47473046"
* >>> Math.uuid(8, 16) // 8 character ID (base=16)
* "098F4D35"
*/
(function() {
// Private array of chars to use
var CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
Math.uuid = function (len, radix) {
var chars = CHARS, uuid = [];
radix = radix || chars.length;
if (len) {
// Compact form
for (var i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
} else {
// rfc4122, version 4 form
var r;
// rfc4122 requires these characters
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
uuid[14] = '4';
// Fill in random data. At i==19 set the high bits of clock sequence as
// per rfc4122, sec. 4.1.5
for (var i = 0; i < 36; i++) {
if (!uuid[i]) {
r = 0 | Math.random()*16;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
}
return uuid.join('');
};
// A more performant, but slightly bulkier, RFC4122v4 solution. We boost performance
// by minimizing calls to random()
Math.uuidFast = function() {
var chars = CHARS, uuid = new Array(36), rnd=0, r;
for (var i = 0; i < 36; i++) {
if (i==8 || i==13 || i==18 || i==23) {
uuid[i] = '-';
} else if (i==14) {
uuid[i] = '4';
} else {
if (rnd <= 0x02) rnd = 0x2000000 + (Math.random()*0x1000000)|0;
r = rnd & 0xf;
rnd = rnd >> 4;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
return uuid.join('');
};
// A more compact, but less performant, RFC4122v4 solution:
Math.uuidCompact = function() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
return v.toString(16);
}).toUpperCase();
};
})();
// END Math.uuid.js
/**
*
* MD5 (Message-Digest Algorithm)
*
* For original source see http://www.webtoolkit.info/
* Download: 15.02.2009 from http://www.webtoolkit.info/javascript-md5.html
*
* Licensed under CC-BY 2.0 License
* (http://creativecommons.org/licenses/by/2.0/uk/)
*
**/
var Crypto = {};
(function() {
Crypto.MD5 = function(string) {
function RotateLeft(lValue, iShiftBits) {
return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
}
function AddUnsigned(lX,lY) {
var lX4,lY4,lX8,lY8,lResult;
lX8 = (lX & 0x80000000);
lY8 = (lY & 0x80000000);
lX4 = (lX & 0x40000000);
lY4 = (lY & 0x40000000);
lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
if (lX4 & lY4) {
return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
}
if (lX4 | lY4) {
if (lResult & 0x40000000) {
return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
} else {
return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
}
} else {
return (lResult ^ lX8 ^ lY8);
}
}
function F(x,y,z) { return (x & y) | ((~x) & z); }
function G(x,y,z) { return (x & z) | (y & (~z)); }
function H(x,y,z) { return (x ^ y ^ z); }
function I(x,y,z) { return (y ^ (x | (~z))); }
function FF(a,b,c,d,x,s,ac) {
a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
return AddUnsigned(RotateLeft(a, s), b);
};
function GG(a,b,c,d,x,s,ac) {
a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
return AddUnsigned(RotateLeft(a, s), b);
};
function HH(a,b,c,d,x,s,ac) {
a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
return AddUnsigned(RotateLeft(a, s), b);
};
function II(a,b,c,d,x,s,ac) {
a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
return AddUnsigned(RotateLeft(a, s), b);
};
function ConvertToWordArray(string) {
var lWordCount;
var lMessageLength = string.length;
var lNumberOfWords_temp1=lMessageLength + 8;
var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
var lWordArray=Array(lNumberOfWords-1);
var lBytePosition = 0;
var lByteCount = 0;
while ( lByteCount < lMessageLength ) {
lWordCount = (lByteCount-(lByteCount % 4))/4;
lBytePosition = (lByteCount % 4)*8;
lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));
lByteCount++;
}
lWordCount = (lByteCount-(lByteCount % 4))/4;
lBytePosition = (lByteCount % 4)*8;
lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
lWordArray[lNumberOfWords-2] = lMessageLength<<3;
lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
return lWordArray;
};
function WordToHex(lValue) {
var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
for (lCount = 0;lCount<=3;lCount++) {
lByte = (lValue>>>(lCount*8)) & 255;
WordToHexValue_temp = "0" + lByte.toString(16);
WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
}
return WordToHexValue;
};
//** function Utf8Encode(string) removed. Aready defined in pidcrypt_utils.js
var x=Array();
var k,AA,BB,CC,DD,a,b,c,d;
var S11=7, S12=12, S13=17, S14=22;
var S21=5, S22=9 , S23=14, S24=20;
var S31=4, S32=11, S33=16, S34=23;
var S41=6, S42=10, S43=15, S44=21;
// string = Utf8Encode(string); #function call removed
x = ConvertToWordArray(string);
a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
for (k=0;k<x.length;k+=16) {
AA=a; BB=b; CC=c; DD=d;
a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);
d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
c=FF(c,d,a,b,x[k+2], S13,0x242070DB);
b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);
c=FF(c,d,a,b,x[k+6], S13,0xA8304613);
b=FF(b,c,d,a,x[k+7], S14,0xFD469501);
a=FF(a,b,c,d,x[k+8], S11,0x698098D8);
d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
a=FF(a,b,c,d,x[k+12],S11,0x6B901122);
d=FF(d,a,b,c,x[k+13],S12,0xFD987193);
c=FF(c,d,a,b,x[k+14],S13,0xA679438E);
b=FF(b,c,d,a,x[k+15],S14,0x49B40821);
a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);
d=GG(d,a,b,c,x[k+6], S22,0xC040B340);
c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);
b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);
d=GG(d,a,b,c,x[k+10],S22,0x2441453);
c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);
c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);
a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);
b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
d=HH(d,a,b,c,x[k+8], S32,0x8771F681);
c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
b=HH(b,c,d,a,x[k+6], S34,0x4881D05);
a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
a=II(a,b,c,d,x[k+0], S41,0xF4292244);
d=II(d,a,b,c,x[k+7], S42,0x432AFF97);
c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);
b=II(b,c,d,a,x[k+5], S44,0xFC93A039);
a=II(a,b,c,d,x[k+12],S41,0x655B59C3);
d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
b=II(b,c,d,a,x[k+1], S44,0x85845DD1);
a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
c=II(c,d,a,b,x[k+6], S43,0xA3014314);
b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);
a=II(a,b,c,d,x[k+4], S41,0xF7537E82);
d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);
c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
b=II(b,c,d,a,x[k+9], S44,0xEB86D391);
a=AddUnsigned(a,AA);
b=AddUnsigned(b,BB);
c=AddUnsigned(c,CC);
d=AddUnsigned(d,DD);
}
var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);
return temp.toLowerCase();
}
})();
// END Crypto.md5.js
// Basic wrapper for localStorage
var localJSON = (function(){
if (!localStorage) {
return false;
}
return {
set: function(prop, val) {
localStorage.setItem(prop, JSON.stringify(val));
},
get: function(prop, def) {
try {
if (localStorage.getItem(prop) === null) {
return def;
}
return JSON.parse((localStorage.getItem(prop) || 'false'));
} catch(err) {
return def;
}
},
remove: function(prop) {
localStorage.removeItem(prop);
}
};
})();
(function() {
// While most of the IDB behaviors match between implementations a
// lot of the names still differ. This section tries to normalize the
// different objects & methods.
window.indexedDB = window.indexedDB ||
window.mozIndexedDB ||
window.webkitIndexedDB;
window.IDBCursor = window.IDBCursor ||
window.webkitIDBCursor;
window.IDBKeyRange = window.IDBKeyRange ||
window.webkitIDBKeyRange;
window.IDBTransaction = window.IDBTransaction ||
window.webkitIDBTransaction;
window.IDBDatabaseException = window.IDBDatabaseException ||
window.webkitIDBDatabaseException;
var root = this;
var pouch = {};
if (typeof exports !== 'undefined') {
exports.pouch = pouch;
} else {
root.pouch = pouch;
}
// IndexedDB requires a versioned database structure, this is going to make
// it hard to dynamically create object stores if we needed to for things
// like views
var POUCH_VERSION = 1;
// Cache for open databases
var pouchCache = {};
// The object stores created for each database
// DOC_STORE stores the document meta data, its revision history and state
var DOC_STORE = 'document-store';
// BY_SEQ_STORE stores a particular version of a document, keyed by its
// sequence id
var BY_SEQ_STORE = 'by-sequence';
// Enumerate errors, add the status code so we can reflect the HTTP api
// in future
var Errors = {
MISSING_BULK_DOCS: {
status: 400,
error: 'bad_request',
reason: "Missing JSON list of 'docs'"
},
MISSING_DOC: {
status: 404,
error: 'not_found',
reason: 'missing'
},
REV_CONFLICT: {
status: 409,
error: 'conflict',
reason: 'Document update conflict'
}
};
var ajax = function (options, callback) {
options.success = function (obj) {
callback(null, obj);
};
options.error = function (err) {
if (err) callback(err);
else callback(true);
};
if (options.data && typeof options.data !== 'string') {
options.data = JSON.stringify(options.data);
}
options.dataType = 'json';
options.contentType = 'application/json';
$.ajax(options);
};
// Pretty dumb name for a function, just wraps callback calls so we dont
// to if (callback) callback() everywhere
var call = function() {
var fun = arguments[0];
var args = Array.prototype.slice.call(arguments);
args.shift();
if (typeof fun === typeof Function) {
fun.apply(this, args);
}
};
// Preprocess documents, parse their revisions, assign an id and a
// revision for new writes that are missing them, etc
var parseDoc = function(doc, newEdits) {
if (newEdits) {
if (!doc._id) {
doc._id = Math.uuid();
}
var newRevId = Math.uuid(32, 16);
var nRevNum;
if (doc._rev) {
var revInfo = /^(\d+)-(.+)$/.exec(doc._rev);
if (!revInfo) {
throw "invalid value for property '_rev'";
}
doc._revisions = [{
pos: parseInt(revInfo[1], 10),
ids: [revInfo[2], [[newRevId, []]]]
}];
nRevNum = parseInt(revInfo[1], 10) + 1;
} else {
doc._revisions = [{
pos: 1,
ids : [newRevId, []]
}];
nRevNum = 1;
}
} else {
if (!doc._revisions) {
var revInfo = /^(\d+)-(.+)$/.exec(doc._rev);
nRevNum = parseInt(revInfo[1], 10);
newRevId = revInfo[2];
doc._revisions = [{
pos: parseInt(revInfo[1], 10),
ids: [revInfo[2], []]
}];
}
}
doc._id = decodeURIComponent(doc._id);
doc._rev = [nRevNum, newRevId].join('-');
return Object.keys(doc).reduce(function(acc, key) {
if (/^_/.test(key))
acc.metadata[key.slice(1)] = doc[key];
else
acc.data[key] = doc[key];
return acc;
}, {metadata : {}, data : {}});
};
var compareRevs = function(a, b) {
// Sort by id
if (a.id !== b.id) {
return (a.id < b.id ? -1 : 1);
}
// Then by deleted
if (a.deleted ^ b.deleted) {
return (a.deleted ? -1 : 1);
}
// Then by rev id
if (a.revisions[0].pos === b.revisions[0].pos) {
return (a.revisions[0].ids < b.revisions[0].ids ? -1 : 1);
}
// Then by depth of edits
return (a.revisions[0].start < b.revisions[0].start ? -1 : 1);
};
var parseUrl = function(url) {
var a = document.createElement('a');
a.href = url;
return a;
}
var getHost = function(name) {
if (/http:/.test(name)) {
var url = parseUrl(name);
return {
host: url.protocol + '//' + url.hostname + ':' + url.port + '/',
db: url.pathname.replace('/', '')
};
}
return {host: '/', db: url};
}
var fetchCheckpoint = function(src, target, callback) {
var id = Crypto.MD5(src.id() + target.id());
src.get('_local/' + id, function(err, doc) {
if (err && err.status === 404) {
callback(0);
} else {
callback(doc.last_seq);
}
});
};
var writeCheckpoint = function(src, target, checkpoint, callback) {
var check = {
_id: '_local/' + Crypto.MD5(src.id() + target.id()),
last_seq: checkpoint
};
src.get(check._id, function(err, doc) {
if (doc && doc._rev) {
check._rev = doc._rev;
}
src.put(check, function(err, doc) {
callback();
});
});
};
var replicate = function(src, target, callback) {
fetchCheckpoint(src, target, function(checkpoint) {
var results = [];
var completed = false;
var pending = 0;
var last_seq = 0;
var result = {
ok: true,
start_time: new Date(),
docs_read: 0,
docs_written: 0
};
function isCompleted() {
if (completed && pending === 0) {
result.end_time = new Date();
writeCheckpoint(src, target, last_seq, function() {
call(callback, null, result);
});
}
}
src.changes({
since: checkpoint,
onChange: function(change) {
results.push(change);
result.docs_read++;
pending++;
var diff = {};
diff[change.id] = change.changes.map(function(x) { return x.rev; });
target.revsDiff(diff, function(err, diffs) {
for (var id in diffs) {
diffs[id].missing.map(function(rev) {
src.get(id, {revs: true, rev: rev}, function(err, doc) {
target.post(doc, {newEdits: false}, function() {
result.docs_written++;
pending--;
isCompleted();
});
});
});
}
});
},
complete: function(err, res) {
last_seq = res.last_seq;
completed = true;
isCompleted();
}
});
});
};
// This code is all ugly as hell, just making it work for what we need it
// for right now then will fix it up
var makeCouch = function(name, opts, callback) {
var host = getHost(name);
var db = {};
var dbUrl = host.host + host.db;
db.id = function() {
return dbUrl;
};
db.info = function(callback) {
};
db.get = function(id, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
var params = [];
if (opts.revs) {
params.push('revs=true');
}
if (opts.rev) {
params.push('rev=' + opts.rev);
}
params = params.join('&');
params = params === '' ? '' : '?' + params;
ajax({type: 'GET', url: dbUrl + id + params}, function(err, doc) {
if (err) {
return call(callback, Errors.MISSING_DOC);
}
call(callback, null, doc);
});
};
db.remove = function(doc, opts, callback) {
};
db.put = db.post = function(doc, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
var params = '';
if (opts.newEdits) {
params = '?newEdits=' + opts.newEdits;
}
ajax({type:'PUT', url: dbUrl + doc._id + params, data: doc}, callback);
};
db.bulkDocs = function(req, opts, callback) {
ajax({type:'POST', url: dbUrl + '_bulk_docs', data: req}, callback);
};
db.allDocs = function(opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
ajax({type:'GET', url: dbUrl + '_all_docs'}, callback);
};
db.changes = function(opts, callback) {
if (opts instanceof Function) {
opts = {complete: opts};
}
if (callback) {
opts.complete = callback;
}
var params = '?style=all_docs'
if (opts.include_docs) {
params += '&include_docs=true'
}
if (opts.since) {
params += '&since=' + opts.since;
}
ajax({type:'GET', url: dbUrl + '_changes' + params}, function(err, res) {
res.results.forEach(function(c) {
call(opts.onChange, c);
});
call(opts.complete, null, res);
});
};
db.revsDiff = function(req, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
ajax({type:'POST', url: dbUrl + '_revs_diff', data: req}, function(err, res) {
call(callback, null, res);
});
};
ajax({type: 'PUT', url: dbUrl}, function(err, ret) {
if (!err || err.status === 412) {
call(callback, null, db);
}
});
}
// This opens a database, creating it if needed and returns the api
// used to access the database
var makePouch = function(idb, name) {
// Firefox requires a unique key for every idb object we store, the
// BY_SEQ_STORE doesnt have a natural key (the autoIncrement is supposed
// to be its key) so we just give it the current time + an incrementing
// number
var junkSeed = 0;
// Now we create the PouchDB interface
var db = {update_seq: 0};
// Wrapper for functions that call the bulkdocs api with a single doc,
// if the first result is an error, return an error
var singularErr = function(callback) {
return function(err, results) {
if (err || results[0].error) {
call(callback, err || results[0]);
} else {
call(callback, null, results[0]);
}
};
};
// Pretty much all below can be combined into a higher order function to
// traverse revisions
// Turn a tree into a list of rootToLeaf paths
var expandTree = function(all, i, tree) {
all.push({rev: i + '-' + tree[0], status: 'available'});
tree[1].forEach(function(child) {
expandTree(all, i + 1, child);
});
}
var collectRevs = function(path) {
var revs = [];
expandTree(revs, path.pos, path.ids);
return revs;
}
var collectLeavesInner = function(all, pos, tree) {
if (!tree[1].length) {
all.push({rev: pos + '-' + tree[0]});
}
tree[1].forEach(function(child) {
collectLeavesInner(all, pos+1, child);
});
}
var collectLeaves = function(revs) {
var leaves = [];
revs.forEach(function(tree) {
collectLeavesInner(leaves, tree.pos, tree.ids);
});
return leaves;
}
var collectConflicts = function(revs) {
var leaves = collectLeaves(revs);
// First is current rev
leaves.shift();
return leaves.map(function(x) { return x.rev; });
}
// Each database needs a unique id so that we can store the sequence
// checkpoint without having other databases confuse itself, since
// localstorage is per host this shouldnt conflict, if localstorage
// gets wiped it isnt fatal, replications will just start from scratch
db.id = function() {
var id = localJSON.get(name + '_id', null);
if (id === null) {
id = Math.uuid();
localJSON.set(name + '_id', id);
}
return id;
};
// Looping through all the documents in the database is a terrible idea
// easiest to implement though, should probably keep a counter
db.info = function(callback) {
var count = 0;
idb.transaction([DOC_STORE], IDBTransaction.READ)
.objectStore(DOC_STORE).openCursor().onsuccess = function(e) {
var cursor = e.target.result;
if (!cursor) {
return callback(null, {
db_name: name.replace(/^pouch:/, ''),
doc_count: count,
update_seq: db.update_seq
});
}
if (cursor.value.deleted !== true) {
count++;
}
cursor['continue']();
};
};
// First we look up the metadata in the ids database, then we fetch the
// current revision(s) from the by sequence store
db.get = function(id, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
var req = idb.transaction([DOC_STORE], IDBTransaction.READ)
.objectStore(DOC_STORE).get(id);
req.onsuccess = function(e) {
var metadata = e.target.result;
if (!e.target.result || metadata.deleted) {
return call(callback, Errors.MISSING_DOC);
}
var nreq = idb.transaction([BY_SEQ_STORE], IDBTransaction.READ)
.objectStore(BY_SEQ_STORE).get(metadata.seq);
nreq.onsuccess = function(e) {
var doc = e.target.result;
delete doc._junk;
doc._id = metadata.id;
doc._rev = metadata.rev;
if (opts.revs_info) {
doc._revs_info = metadata.revisions.reduce(function(prev, current) {
return prev.concat(collectRevs(current));
}, []);
}
callback(null, doc);
};
};
};
db.remove = function(doc, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
var newDoc = JSON.parse(JSON.stringify(doc));
newDoc._deleted = true;
return db.bulkDocs({docs: [newDoc]}, opts, singularErr(callback));
};
db.put = db.post = function(doc, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
return db.bulkDocs({docs: [doc]}, opts, singularErr(callback));
};
db.revsDiff = function(req, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
var ids = Object.keys(req);
var count = 0;
var missing = {};
function readDoc(err, doc, id) {
req[id].map(function(revId) {
if (!doc || doc._revs_info.every(function(x) { return x.rev !== revId; })) {
if (!missing[id]) {
missing[id] = {missing: []};
}
missing[id].missing.push(revId);
}
});
if (++count === ids.length) {
return call(callback, null, missing);
}
}
ids.map(function(id) {
db.get(id, {revs_info: true}, function(err, doc) {
readDoc(err, doc, id);
});
});
};
db.bulkDocs = function(req, opts, callback) {
if (opts instanceof Function) {
callback = opts;
opts = {};
}
if (!req.docs) {
return call(callback, Errors.MISSING_BULK_DOCS);
}
var newEdits = 'new_edits' in opts ? opts.new_edits : true;
// We dont want to modify the users variables in place, JSON is kinda
// nasty for a deep clone though
var docs = JSON.parse(JSON.stringify(req.docs));
// Parse and sort the docs
var docInfos = docs.map(function(doc, i) {
var newDoc = parseDoc(doc, newEdits);
// We want to ensure the order of the processing and return of the docs,
// so we give them a sequence number
newDoc._bulk_seq = i;
return newDoc;
});
docInfos.sort(function(a, b) {
return compareRevs(a.metadata, b.metadata);
});
var keyRange = IDBKeyRange.bound(
docInfos[0].metadata.id, docInfos[docInfos.length-1].metadata.id,
false, false);
// This groups edits to the same document together
var buckets = docInfos.reduce(function(acc, docInfo) {
if (docInfo.metadata.id === acc[0][0].metadata.id) {
acc[0].push(docInfo);
} else {
acc.unshift([docInfo]);
}
return acc;
}, [[docInfos.shift()]]);
//The reduce screws up the array ordering
buckets.reverse();
buckets.forEach(function(bucket) {
bucket.sort(function(a, b) { return a._bulk_seq - b._bulk_seq; });
});
var txn = idb.transaction([DOC_STORE, BY_SEQ_STORE],
IDBTransaction.READ_WRITE);
var results = [];
txn.oncomplete = function(event) {
results.sort(function(a, b) {
return a._bulk_seq - b._bulk_seq;
});
results.forEach(function(result) {
delete result._bulk_seq;
db.changes.emit(result);
});
call(callback, null, results);
};
txn.onerror = function(event) {
if (callback) {
var code = event.target.errorCode;
var message = Object.keys(IDBDatabaseException)[code-1].toLowerCase();
callback({
error : event.type,
reason : message
});
}
};
txn.ontimeout = function(event) {
if (callback) {
var code = event.target.errorCode;
var message = Object.keys(IDBDatabaseException)[code].toLowerCase();
callback({
error : event.type,
reason : message
});
}
};
function winningRev(pos, tree) {
if (!tree[1].length) {
return pos + '-' + tree[0];
}
return winningRev(pos + 1, tree[1][0]);
}
var writeDoc = function(docInfo, callback) {
// The doc will need to refer back to its meta data document
docInfo.data._id = docInfo.metadata.id;
if (docInfo.metadata.deleted) {
docInfo.data._deleted = true;
}
docInfo.data._junk = new Date().getTime() + (++junkSeed);
var dataReq = txn.objectStore(BY_SEQ_STORE).put(docInfo.data);
dataReq.onsuccess = function(e) {
docInfo.metadata.seq = e.target.result;
// We probably shouldnt even store the winning rev, just figure it
// out on read
docInfo.metadata.rev = winningRev(docInfo.metadata.revisions[0].pos,
docInfo.metadata.revisions[0].ids);
var metaDataReq = txn.objectStore(DOC_STORE).put(docInfo.metadata);
metaDataReq.onsuccess = function() {
results.push({
ok: true,
id: docInfo.metadata.id,
rev: docInfo.metadata.rev,
_bulk_seq: docInfo._bulk_seq
});
call(callback);
};
};
};
var makeErr = function(err, seq) {
err._bulk_seq = seq;
return err;
};
var cursReq = txn.objectStore(DOC_STORE)
.openCursor(keyRange, IDBCursor.NEXT);
var update = function(cursor, oldDoc, docInfo, callback) {
var mergedRevisions = pouch.merge(oldDoc.revisions,
docInfo.metadata.revisions[0], 1000);
var inConflict = (oldDoc.deleted && docInfo.metadata.deleted) ||
(!oldDoc.deleted && newEdits && mergedRevisions.conflicts !== 'new_leaf');
if (inConflict) {
results.push(makeErr(Errors.REV_CONFLICT, docInfo._bulk_seq));
call(callback);
return cursor['continue']();
}
docInfo.metadata.revisions = mergedRevisions.tree;
writeDoc(docInfo, function() {
cursor['continue']();
call(callback);