A process to manipulate feeds through arithmetic operation

[alexandrecuer]

3 majors features proposed :

• addition of a basic formula process in order to manipulate feeds through arithmetic operations (multiplication, division, addition, soustraction) - so you can do f1+2*f2-f3/12 for example if you want
• addition on common.php of a compute_meta() function, in order to calculate some basics settings when processing multiple feeds in a single process
• addition of two simple processes, converting a liquid or air flow in m3/h in an accumulated Kwh feed
  interesting for ventilation and water heating circuits

Cosmetics but usefull :

• in the controller : implementation of a route to view the last entries of the logfile + all the related shebang in view.php
• the calculation of the number of points behind is reworked with unix time stamps...
• 'tag' integration in the feed select menu just to feel more comfortable

Hope this is not a problem to have multiple features in a single PR - I can rework the whole if you dont feel happy with that....

Alex

[TrystanLea]

Hello @alexandrecuer this looks great, testing it here when I try to add a formula process the 'enter output feed' box goes green but the create button does not appear. Any ideas?

[alexandrecuer]

what is your formula ?
maybe ouput feed name already exists ?
both boxes (formula & output) are going green ?
it happens to me once and when I renew the cache, it worked…
it is strange…I only added an extra test in the validate function of the view.js. if the type is “formula”, it takes the formula and test it with 2 simple regular expressions

var regex1 = /[^-\+\*\/\df]/;
var regex2 = /f/;
if (formula.match(regex1) || !formula.match(regex2)){
    $(".process_option[option="+z+"]").css("background-color","#ffeeee");
    valid = false;
} else {
    $(".process_option[option="+z+"]").css("background-color","#eeffee");
}

for feeds involved in the formula , the existence check is done later in the controller (create)