co-reader support

September 14, 2016, Rolf Eckertz
Co-readers are users that are allowed to read diaries of other users, who have given them the according access rights.

A user may declare certain aritcles or data as private, then no other co-readers have access to these data.

The data-categories are:

• diary reports
• expenditure-data
• income-data
• (work-) time-data
• geolocation information

The system provides the following functions:

• Invite other users as co-readers to your diary
• enter invitiation in the diary application
• choose menue point
• dialogue function
• entry field for email address of co-reader
• formal check of email address
• entry field for additional text for the user who shall be invited
• on click - AJAX-request to the server
• send email address and additional text to the server
• server stores the data
• server calculates onetime handle
• server sends response to client
• client starts local email application and passes address, subject and body for the email (some email programs must be started manually in advance)
• some information in http://stackoverflow.com/questions/36667980/can-i-open-a-mailto-link-in-gmail-and-have-it-sent-without-clicking-send 
• window.location.href="mailto:myemail@gmail.com?subject=My+great+email+to+you&body=" + text;  
• email is send to the co-reader
• co-reader can register as reader to a diary
• click on link in the email or copy the link to the url of the browser and send it to the server
• if everything is ok, the co-reader registration is done automatically and the browser starts the login, otherwise an error message is displayed and no co-reader registration is done
• the co-reader can read the diary of other people according to the registration and acknowledgement

In future releases there may be additional features regarding granular security on diary-entry basis, some entries then may be declared strictly private or groups of co-readers may be supported. At the time there is no plan regarding the realization of these additional features.