From 1b916ea9e1f6694009c92a93857d87c371ff0f6c Mon Sep 17 00:00:00 2001
From: Ralph Iden <riden@creativewidgetworks.com>
Date: Tue, 26 Jan 2016 21:15:05 -0600
Subject: [PATCH] Add insertPrecheck function and unit tests.

---
 lib/weld.js     |  7 ++++++-
 lib/weld.min.js | 20 ++++++++++----------
 test/test.html  |  9 +++++++--
 test/test.js    | 25 +++++++++++++++++++++++++
 4 files changed, 48 insertions(+), 13 deletions(-)

diff --git a/lib/weld.js b/lib/weld.js
index fd35313..1f71516 100644
--- a/lib/weld.js
+++ b/lib/weld.js
@@ -329,7 +329,9 @@
               }
             }
             ops.traverse(templateParent, target, i, value[i], value[i]);
-            ops.insert(templateParent, target, i, value[i]);
+            if (ops.insertPrecheck(templateParent, target, i, value[i])) {
+              ops.insert(templateParent, target, i, value[i]);
+            }
           }
 
         // OBJECT
@@ -397,6 +399,9 @@
         }
       },
       map : false, // this is a user-defined operation
+      insertPrecheck : function(parent, element, key, value) {
+        return true;
+      },      
       insert : function(parent, element) {
         // Insert the template back into document
         if (element.weld && element.weld.insertBefore) {
diff --git a/lib/weld.min.js b/lib/weld.min.js
index 0e84223..085be62 100644
--- a/lib/weld.min.js
+++ b/lib/weld.min.js
@@ -1,10 +1,10 @@
-(function(v){if(!Object.keys){var x=!0,y="toString toLocaleString valueOf hasOwnProperty isPrototypeOf propertyIsEnumerable constructor".split(" "),z=y.length,A;for(A in{toString:null})x=!1;Object.keys=function(c){if("object"!==typeof c&&"function"!==typeof c||null===c)throw new TypeError("Object.keys called on a non-object");var e=[],f;for(f in c)c.hasOwnProperty(f)&&e.push(f);if(x)for(f=0;f<z;f++){var a=y[f];c.hasOwnProperty(a)&&e.push(a)}return e}}Array.prototype.indexOf||(Array.prototype.indexOf=
-function(c){if(null==this)throw new TypeError;var e=Object(this),f=e.length>>>0;if(0===f)return-1;var a=0;0<arguments.length&&(a=Number(arguments[1]),a!=a?a=0:0!=a&&Infinity!=a&&-Infinity!=a&&(a=(0<a||-1)*Math.floor(Math.abs(a))));if(a>=f)return-1;for(a=0<=a?a:Math.max(f-Math.abs(a),0);a<f;a++)if(a in e&&e[a]===c)return a;return-1});var u="undefined"===typeof console?{log:function(){}}:console,h=!1;"undefined"!==typeof process&&process.title&&(h=!0);var B=/input|select|option|button/i,C=/img/i,D=
-/textarea/i,E=/yes|true|1|ok/i,r=0,F=h?"\u001b[32m ?\u001b[37m":" Success",G=h?"\u001b[31m ?\u001b[37m":" Fail",H=function(c,e){var f=c.toUpperCase();return function(a,c,p,g){u.log(w(),(h?"\u001b[37m+ ":"+ ")+f+" -","parent:",l(a)+",","element:",l(c)+",","key:",l(p)+",","value:",l(g));r+=1;if(e)return a=e(a,c,p,g),--r,u.log(w(),"+ "+c+""+(!1!==a?F:G)),a;--r;t("- OPERATION NOT FOUND: ",f)}},w=function(){for(var c=r,e="";c--;)e+=h?" \u043a\u0430  ":" |   ";return e},t=function(){var c=Array.prototype.slice.call(arguments);
-u.log(w(),c.join(" "))},l=function(c){var e=c+"";return h?"false"===e||"null"===e||""===e||"undefined"===e||"undefined"===typeof c||!1===c?(""===e&&(e="(empty string)"),"\u001b[31m"+e+"\u001b[37m"):"\u001b[33m"+e+"\u001b[37m":e};v.weld=function(c,e,f){var a,h,p,g={alias:{},debug:!1,insert:!1};if(f)for(h in f)f.hasOwnProperty(h)&&(g[h]=f[h]);p=g.debug;var k={siblings:function(a,b,m,d){var e,c,f=a.children;cs=f.length;for(b.weld={parent:a,classes:b.className.split(" ")};cs--;)if(m=f[cs],m===b)cs<f.length&&
-(b.weld.insertBefore=f[cs+1]),p&&t("- REMOVE - element:",l(b),"class:",l(b.className),"id:",l(b.id)),a.removeChild(b);else{d=m.className.split(" ");e=d.length;for(c=!0;e--;)if(0>b.weld.classes.indexOf(d[e])){c=!1;break}c&&(p&&t("- REMOVE - element:",l(m),"class:",l(m.className),"id:",l(m.id)),a.removeChild(m))}},traverse:function(a,b,m,d,e){var c,f,g,h=b.parentNode;~{}.toString.call(d).indexOf("Date")&&(d=d.toString());if(d.nodeType||"object"!==typeof d)k.set(a,b,m,d,e);else if(d.length&&d[0])for(h?
-k.siblings(h,b,m,d):b.weld&&b.weld.parent&&(h=b.weld.parent),m=d.length,a=0;a<m;a++){p&&t("- CLONE - element:",l(b),"class:",l(b.className),"id:",l(b.id));c=b.cloneNode(!0);c.weld={};if(b.weld){f=Object.keys(b.weld);e=f.length;for(var q;e--;)q=f[e],c.weld[q]=b.weld[q]}k.traverse(h,c,a,d[a],d[a]);k.insert(h,c,a,d[a])}else for(f=Object.keys(d),q=f.length;q--;){var n=f[q];g=d[n];c=k.match(b,b,n,g);1<n.length&&"@"==n[0]?(c=n.substr(1),"."==c?(~{}.toString.call(d).indexOf("Date")&&(d[n]=d[n].toString()),
-(d.nodeType||"object"!==typeof d[n])&&k.set(a,b,m,d[n],e)):b.setAttribute(c,d[n])):c?k.traverse(b,c,n,g,e):!1!==c&&"object"===typeof g&&0<Object.keys(g).length&&k.traverse(h,b,n,g)}},elementType:function(a,b,c,d){if(b&&(a=b.nodeName,"string"===typeof a)){if(B.test(a))return"input";if(C.test(a))return"image";if(D.test(a))return"textarea"}},map:!1,insert:function(a,b){b.weld&&b.weld.insertBefore?a.insertBefore(b,b.weld.insertBefore):a.appendChild(b)},set:function(a,b,c,d,e){if(k.map&&!1===k.map(a,b,
-c,d,e))return!1;p&&t("- SET: value is",d.tagName);a=k.elementType(a,b,c,d);if(d&&d.nodeType){for(b.ownerDocument!==d.ownerDocument?d=b.ownerDocument.importNode(d,!0):d.parentNode&&d.parentNode.removeChild(d);b.firstChild;)b.removeChild(b.firstChild);b.appendChild(d)}else"input"===a?"select"===b.tagName.toLowerCase()?b.value=d:"checkbox"===b.type.toLowerCase()?E.test(d)?b.setAttribute("checked",!0):b.hasAttribute("checked")&&b.removeAttribute("checked"):b.setAttribute("value",d):"image"===a?b.setAttribute("src",
-d):"textarea"===a?(b.textContent=d,b.value!==d&&(b.value=d)):b.textContent=d;return!0},match:function(a,b,c,d){if("@"!=c[0]){if("undefined"!==typeof g.alias[c])if("function"===typeof g.alias[c])c=g.alias[c](a,b,c,d)||c;else{if(!1===g.alias[c])return!1;c=g.alias[c]}if(c&&c.nodeType)return c;if(b){if(b.querySelector)return b.querySelector("."+c+",#"+c+',[name="'+c+'"]');a=b.getElementsByTagName("*");b=a.length;var e;for(e=0;e<b;e++)if(d=a[e],d.id===c||d.name===c||-1<d.className.split(" ").indexOf(c))return d}}}};
-for(a in k)k.hasOwnProperty(a)&&(currentOp=k[a],f=g[a]||k[a],p&&(f=H(a,f)),k[a]=f);k.traverse(null,c,null,e);g.debug&&u.log(c.outerHTML)};"undefined"!==typeof v.define&&v.define.amd&&define("weld",[],function(){return window.weld})})("undefined"!==typeof process&&"undefined"!==typeof process.title?exports:window);
\ No newline at end of file
+(function(w){if(!Object.keys){var y=!0,z="toString toLocaleString valueOf hasOwnProperty isPrototypeOf propertyIsEnumerable constructor".split(" "),A=z.length,B;for(B in{toString:null})y=!1;Object.keys=function(e){if("object"!==typeof e&&"function"!==typeof e||null===e)throw new TypeError("Object.keys called on a non-object");var b=[],f;for(f in e)e.hasOwnProperty(f)&&b.push(f);if(y)for(f=0;f<A;f++){var a=z[f];e.hasOwnProperty(a)&&b.push(a)}return b}}Array.prototype.indexOf||(Array.prototype.indexOf=
+function(e){if(null==this)throw new TypeError;var b=Object(this),f=b.length>>>0;if(0===f)return-1;var a=0;0<arguments.length&&(a=Number(arguments[1]),a!=a?a=0:0!=a&&Infinity!=a&&-Infinity!=a&&(a=(0<a||-1)*Math.floor(Math.abs(a))));if(a>=f)return-1;for(a=0<=a?a:Math.max(f-Math.abs(a),0);a<f;a++)if(a in b&&b[a]===e)return a;return-1});var u="undefined"===typeof console?{log:function(){}}:console,g=!1;"undefined"!==typeof process&&process.title&&(g=!0);var C=/input|select|option|button/i,D=/img/i,E=
+/textarea/i,F=/yes|true|1|ok/i,r=0,G=g?"\u001b[32m ?\u001b[37m":" Success",H=g?"\u001b[31m ?\u001b[37m":" Fail",I=function(e,b){var f=e.toUpperCase();return function(a,e,p,h){u.log(x(),(g?"\u001b[37m+ ":"+ ")+f+" -","parent:",l(a)+",","element:",l(e)+",","key:",l(p)+",","value:",l(h));r+=1;if(b)return a=b(a,e,p,h),--r,u.log(x(),"+ "+e+""+(!1!==a?G:H)),a;--r;t("- OPERATION NOT FOUND: ",f)}},x=function(){for(var e=r,b="";e--;)b+=g?" \u043a\u0430  ":" |   ";return b},t=function(){var e=Array.prototype.slice.call(arguments);
+u.log(x(),e.join(" "))},l=function(e){var b=e+"";return g?"false"===b||"null"===b||""===b||"undefined"===b||"undefined"===typeof e||!1===e?(""===b&&(b="(empty string)"),"\u001b[31m"+b+"\u001b[37m"):"\u001b[33m"+b+"\u001b[37m":b};w.weld=function(e,b,f){var a,g,p,h={alias:{},debug:!1,insert:!1};if(f)for(g in f)f.hasOwnProperty(g)&&(h[g]=f[g]);p=h.debug;var k={siblings:function(v,c,m,d){var a,b,e=v.children;cs=e.length;for(c.weld={parent:v,classes:c.className.split(" ")};cs--;)if(m=e[cs],m===c)cs<e.length&&
+(c.weld.insertBefore=e[cs+1]),p&&t("- REMOVE - element:",l(c),"class:",l(c.className),"id:",l(c.id)),v.removeChild(c);else{d=m.className.split(" ");a=d.length;for(b=!0;a--;)if(0>c.weld.classes.indexOf(d[a])){b=!1;break}b&&(p&&t("- REMOVE - element:",l(m),"class:",l(m.className),"id:",l(m.id)),v.removeChild(m))}},traverse:function(a,c,m,d,e){var b,f,h,g=c.parentNode;~{}.toString.call(d).indexOf("Date")&&(d=d.toString());if(d.nodeType||"object"!==typeof d)k.set(a,c,m,d,e);else if(d.length&&d[0])for(g?
+k.siblings(g,c,m,d):c.weld&&c.weld.parent&&(g=c.weld.parent),m=d.length,a=0;a<m;a++){p&&t("- CLONE - element:",l(c),"class:",l(c.className),"id:",l(c.id));b=c.cloneNode(!0);b.weld={};if(c.weld){f=Object.keys(c.weld);e=f.length;for(var q;e--;)q=f[e],b.weld[q]=c.weld[q]}k.traverse(g,b,a,d[a],d[a]);k.insertPrecheck(g,b,a,d[a])&&k.insert(g,b,a,d[a])}else for(f=Object.keys(d),q=f.length;q--;){var n=f[q];h=d[n];b=k.match(c,c,n,h);1<n.length&&"@"==n[0]?(b=n.substr(1),"."==b?(~{}.toString.call(d).indexOf("Date")&&
+(d[n]=d[n].toString()),(d.nodeType||"object"!==typeof d[n])&&k.set(a,c,m,d[n],e)):c.setAttribute(b,d[n])):b?k.traverse(c,b,n,h,e):!1!==b&&"object"===typeof h&&0<Object.keys(h).length&&k.traverse(g,c,n,h)}},elementType:function(a,c,b,d){if(c&&(a=c.nodeName,"string"===typeof a)){if(C.test(a))return"input";if(D.test(a))return"image";if(E.test(a))return"textarea"}},map:!1,insertPrecheck:function(a,c,b,d){return!0},insert:function(a,c){c.weld&&c.weld.insertBefore?a.insertBefore(c,c.weld.insertBefore):
+a.appendChild(c)},set:function(a,c,b,d,e){if(k.map&&!1===k.map(a,c,b,d,e))return!1;p&&t("- SET: value is",d.tagName);a=k.elementType(a,c,b,d);if(d&&d.nodeType){for(c.ownerDocument!==d.ownerDocument?d=c.ownerDocument.importNode(d,!0):d.parentNode&&d.parentNode.removeChild(d);c.firstChild;)c.removeChild(c.firstChild);c.appendChild(d)}else"input"===a?"select"===c.tagName.toLowerCase()?c.value=d:"checkbox"===c.type.toLowerCase()?F.test(d)?c.setAttribute("checked",!0):c.hasAttribute("checked")&&c.removeAttribute("checked"):
+c.setAttribute("value",d):"image"===a?c.setAttribute("src",d):"textarea"===a?(c.textContent=d,c.value!==d&&(c.value=d)):c.textContent=d;return!0},match:function(a,c,b,d){if("@"!=b[0]){if("undefined"!==typeof h.alias[b])if("function"===typeof h.alias[b])b=h.alias[b](a,c,b,d)||b;else{if(!1===h.alias[b])return!1;b=h.alias[b]}if(b&&b.nodeType)return b;if(c){if(c.querySelector)return c.querySelector("."+b+",#"+b+',[name="'+b+'"]');a=c.getElementsByTagName("*");c=a.length;var e;for(e=0;e<c;e++)if(d=a[e],
+d.id===b||d.name===b||-1<d.className.split(" ").indexOf(b))return d}}}};for(a in k)k.hasOwnProperty(a)&&(currentOp=k[a],f=h[a]||k[a],p&&(f=I(a,f)),k[a]=f);k.traverse(null,e,null,b);h.debug&&u.log(e.outerHTML)};"undefined"!==typeof w.define&&w.define.amd&&define("weld",[],function(){return window.weld})})("undefined"!==typeof process&&"undefined"!==typeof process.title?exports:window);
\ No newline at end of file
diff --git a/test/test.html b/test/test.html
index 872a7f7..39d8661 100644
--- a/test/test.html
+++ b/test/test.html
@@ -159,8 +159,13 @@ <h1>checkbox</h1>
         <a id="a1" class="link1" href="#">text</a>
         <a id="a2" class="link2" href="#">text</a>
         <a id="a3" class="link3" href="#">text</a>
-      </div>      
-      
+      </div>  
+
+      <div id="insert-precheck">
+        <div class="things">
+          <div class="thing"></div>
+        </div>
+      </div>
     </div>
   </body>
 </html>
diff --git a/test/test.js b/test/test.js
index f67a301..ededed8 100644
--- a/test/test.js
+++ b/test/test.js
@@ -515,6 +515,31 @@
         test.ok($('#a3', template).attr('href') === "https://google.com");
         test.ok($('#a3', template).text() === "Google Me");
         
+        test.done();
+      });
+    },
+    "Test 23: Selectively insert objects using the insert-precheck filter": function(test) {
+      getTemplate('insert-precheck', function(window, weld, $) {
+
+        weld($('.things')[0], 
+        {
+          things: [
+            { thing : '1' },
+            { thing : '2' },
+            { thing : '3' }
+          ]            
+        },
+        {
+          insertPrecheck: function(parent, element, key, value) {
+            // don't insert the second "thing" by returning false
+            return value.thing != '2'; 
+          }
+        });
+
+        test.ok($('.things').length === 2);
+        test.ok($('.things:nth(0) .thing').text() === '1');
+        test.ok($('.things:nth(1) .thing').text() === '3');
+
         test.done();
       });
     },