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or.js
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or.js
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"use strict";
const locreq = require("locreq")(__dirname);
const Promise = require("bluebird");
const AccessStrategy = locreq("lib/chip-types/access-strategy.js");
const AccessStrategyType = locreq("lib/chip-types/access-strategy-type.js");
const Error = locreq("lib/response/error.js").Error;
function parse_params (app, params){
const access_strategies = [];
for (const i in params){
access_strategies.push(new AccessStrategy(app, params[i]));
}
return access_strategies;
}
module.exports = function(app){
const or = {
name: "or",
get_pre_aggregation_stage: function(context, params){
const facet_stages = {};
const total_pipelines = 0;
const access_strategies = parse_params(app, params);
return Promise.map(access_strategies, function(strategy){
return strategy.get_pre_aggregation_stage(context);
})
.filter(a=>a.length===1)
.filter(a=>Object.keys(a[0])[0]==="$match")
.map(a=>a[0].$match)
.then(alternatives=> {
if(alternatives.length){
return [{$match: {$or: alternatives}}];
}else{
return [];
}
});
},
item_sensitive: function(params){
const access_strategies = parse_params(app, params);
return Promise.map(access_strategies, function(access_strategy){
return access_strategy.is_item_sensitive();
})
.reduce((a,b) => a || b);
},
checker_function: function(context, params, item){
return or.item_sensitive(params)
.then(function(item_sensitive){
if (item_sensitive && item === undefined){
return undefined;
} else {
const access_strategies = parse_params(app, params);
const results = access_strategies.map(function(strategy){
return strategy.check(context, item);
});
return Promise.any(results)
.catch(Promise.AggregateError, function(aggregated_errors){
aggregated_errors.forEach(function(error){
if (!(error instanceof Error)){
throw error;
}
});
const error_message = aggregated_errors.map((aggregated_errors)=>aggregated_errors.message)
.reduce((a,b) => `${a} ${b}`);
return Promise.reject(error_message);
});
}
});
},
};
return or;
};

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