[Solved] How to write a object to storage?

[espruino-discuss]

Posted at 2020-02-28 by @MaBecker

Working on an app called locale that will handle locales , so we can see eg month, day names and more in our language.

Writing single values work's like expected, but looks like not using the correct way to write a list.

So how should this be written correctly?

// source 
s = require('Storage');

var locale =  {
  "de_DE": {
    dp : ',',
    ts : '.',
    cs : '€',
    ics : 'EUR',
    sp : 'km',
    ds : 'mm,cm,m,km',
    t : '°C',
    ap: 0,
    mo : "Januar,Februar,März,April,Mai,Juni,Juli,August,September,Oktober,November,Dezember",
    mos : "Jan,Feb,Mär,Apr,Mai,Jun,Jul,Aug,Sep,Okt,Nov,Dez",
    dy : "Sonntag,Montag,Dienstag,Mittwoch,Donnerstag,Freitag,Samstag",
    dys : "So,Mo,Di,Mi,Do,Fr,Sa",
    tr : {
        yes: 'ja', Yes : 'Ja',
        no: 'nein', No : 'Nein',
        ok : 'ok',
        on : 'an',
        off: 'aus'
    }
  }
};

lang = "de_DE";

s.write('locale',`
exports.name = function() {return '${lang}'};
exports.temp = function(n){return n + '${locale[lang].tr}';};
exports.translate = function(t){return ${locale[lang].tr}[t];};
`);


/*
console.log(require('locale').name());
console.log(require('locale').translate("yes"));
console.log(require('locale').temp(25.5));
*/

//translate = function(t) { return locale[lang].tr[t];};


console.log(s.read('locale'));
console.log(require('locale').temp(25.5));
console.log(require('locale').translate("yes"));


/* output
exports.name = function() {return 'de_DE'};
exports.temp = function(n){return n + '[object Object]';};
exports.translate = function(t){return [object Object][t];};
25.5[object Object]
Uncaught ReferenceError: "object" is not defined
 at line 1 col 2
[object Object][t];
 ^
in function "translate" called from line 48 col 46
console.log(require('locale').translate("yes"));
                                             ^
*/

[gfwilliams]

Posted at 2020-02-28 by @gfwilliams

So I guess the issue is:

s.write('locale',`
exports.name = function() {return '${lang}'};
exports.temp = function(n){return n + '${locale[lang].tr}';};
exports.translate = function(t){return ${locale[lang].tr}[t];};
`);

You want something more like:

s.write('locale',`
exports.name = function() {return ${JSON.stringify(lang)}};
exports.temp = function(n){return n + ${JSON.stringify(locale[lang].t)};};
exports.translate = function(t){return ${JSON.stringify(locale[lang].tr}[t]);};
`);

Generally it's safer to use JSON.stringify than to try and quote it yourself :)

[espruino-discuss]

Posted at 2020-02-28 by @MaBecker

Cool - Thanks

s.write('locale',`
        exports.name = function() {return ${JSON.stringify(lang)};};
        exports.temp = function(n){return n + ${JSON.stringify(locale[lang].t)};};
        exports.translate = function(t) { return ${JSON.stringify(locale[lang].tr)}[t]);};
`);