datahub/src/data.transform.js

68 lines
1.5 KiB
JavaScript

this.recline = this.recline || {};
this.recline.Data = this.recline.Data || {};
(function(my) {
// adapted from https://github.com/harthur/costco. heather rules
my.Transform = {};
my.Transform.evalFunction = function(funcString) {
try {
eval("var editFunc = " + funcString);
} catch(e) {
return {errorMessage: e+""};
}
return editFunc;
};
my.Transform.previewTransform = function(docs, editFunc, currentColumn) {
var preview = [];
var updated = my.Transform.mapDocs($.extend(true, {}, docs), editFunc);
for (var i = 0; i < updated.docs.length; i++) {
var before = docs[i]
, after = updated.docs[i]
;
if (!after) after = {};
if (currentColumn) {
preview.push({before: before[currentColumn], after: after[currentColumn]});
} else {
preview.push({before: before, after: after});
}
}
return preview;
};
my.Transform.mapDocs = function(docs, editFunc) {
var edited = []
, deleted = []
, failed = []
;
var updatedDocs = _.map(docs, function(doc) {
try {
var updated = editFunc(_.clone(doc));
} catch(e) {
failed.push(doc);
return;
}
if(updated === null) {
updated = {_deleted: true};
edited.push(updated);
deleted.push(doc);
}
else if(updated && !_.isEqual(updated, doc)) {
edited.push(updated);
}
return updated;
});
return {
updates: edited,
docs: updatedDocs,
deletes: deleted,
failed: failed
};
};
}(this.recline.Data))