var readMore = function()

in lib/cache.js [796:831]
32 lines of code
17 McCabe index (conditional complexity)

        var readMore = function (readIndex, readCount) {
            if (!canceled) {
                if (count > 0 && returnData.value.length >= count) {
                    deferred.resolve(returnData);
                } else {
                    pendingReadRange = that.readRange(readIndex, readCount).then(function (data) {
                        if (data["@odata.context"] && !returnData["@odata.context"]) {
                            returnData["@odata.context"] = data["@odata.context"];
                        }
                        
                        for (var i = 0, length = data.value.length; i < length && (count < 0 || returnData.value.length < count); i++) {
                            var dataIndex = backwards ? length - i - 1 : i;
                            var item = data.value[dataIndex];
                            if (predicate(item)) {
                                var element = {
                                    index: readIndex + dataIndex,
                                    item: item
                                };

                                backwards ? returnData.value.unshift(element) : returnData.value.push(element);
                            }
                        }

                        // Have we reached the end of the collection?
                        if ((!backwards && data.value.length < readCount) || (backwards && readIndex <= 0)) {
                            deferred.resolve(returnData);
                        } else {
                            var nextIndex = backwards ? Math.max(readIndex - pageSize, 0) : readIndex + readCount;
                            readMore(nextIndex, pageSize);
                        }
                    }, function (err) {
                        deferred.reject(err);
                    });
                }
            }
        };