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postal.diagnostics.js
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postal.diagnostics.js
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module.exports = function ( _, postal ) {
var filters = [],
applyFilter = function ( filter, env ) {
var match = 0, possible = 0;
_.each( filter, function ( item, key ) {
if ( env[key] ) {
possible++;
if ( _.isRegExp( item ) && item.test( env[key] ) ) {
match++;
}
else if ( _.isObject( env[key] ) && !_.isArray( env[key] ) ) {
if ( applyFilter( item, env[key] ) ) {
match++;
}
}
else {
if ( _.isEqual( env[key], item ) ) {
match++;
}
}
}
} );
return match === possible;
};
// this returns a callback that, if invoked, removes the wireTap
var wireTap = postal.addWireTap( function ( data, envelope ) {
if ( !filters.length || _.any( filters, function ( filter ) {
return applyFilter( filter, envelope );
} ) ) {
if ( !JSON ) {
throw "This browser or environment does not provide JSON support";
}
try {
console.log( JSON.stringify( envelope ) );
}
catch ( exception ) {
try {
var env = _.extend( {}, envelope );
delete env.data;
console.log( JSON.stringify( env ) + "\n\t" + "JSON.stringify Error: " + exception.message );
}
catch ( ex ) {
console.log( "Unable to parse data to JSON: " + exception );
}
}
}
} );
postal.diagnostics = postal.diagnostics || {};
postal.diagnostics.console = {
clearFilters : function () {
filters = [];
},
removeFilter : function ( filter ) {
filters = _.filter( filters, function ( item ) {
return !_.isEqual( item, filter );
} );
},
addFilter : function ( constraint ) {
if ( !_.isArray( constraint ) ) {
constraint = [ constraint ];
}
_.each( constraint, function ( item ) {
if ( filters.length === 0 || !_.any( filters, function ( filter ) {
return _.isEqual( filter, item );
} ) ) {
filters.push( item );
}
} );
},
getCurrentFilters : function () {
return filters;
},
removeWireTap : function () {
if ( wireTap ) {
wireTap();
}
}
};
};