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not.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 Query = locreq("lib/datastore/query.js");
function parse_params(app, params) {
let strategies;
if (params instanceof Array) {
strategies = params.map(
declaration => new AccessStrategy(app, declaration)
);
} else {
strategies = [new AccessStrategy(app, params)];
}
return strategies;
}
module.exports = function(app) {
return {
name: "not",
getRestrictingQuery: async function(context, params) {
//assuming "not" can take only one access strategy as a parameter
const strategy = parse_params(app, params)[0];
const query = await strategy.getRestrictingQuery(context);
return new Query.Not(query);
},
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, false);
},
checker_function: function(context, params, item) {
const strategies = parse_params(app, params);
return Promise.map(strategies, function(strategy) {
return strategy.check(context, item);
})
.any()
.then(function() {
return Promise.reject("Action not allowed");
})
.catch({ sealious_error: true }, function() {
return Promise.resolve();
});
},
};
};

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