使用javascript将Sharepoint在线文件结构导入json文件

I have a problem, I am a UX Designer and I am designing a Global Enterprise knowledge base. Data is stored everywhere. I need to be able to pull a list of directories & files from an online (hosted on Office 365) sharepoint repository and place it in a json file. Then allow the users to select the files and download them. My biggest need is to be able to get the list from the repository. I have been through the tons of documentation from MSDN, and now more confused than ever. I am strong in HTML5, CSS3, and kind-of weak in Javascript. All help is appreicated.I have a problem, I am a UX Designer and I am d