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sessions-subject.js
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sessions-subject.js
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"use strict";
const locreq = require("locreq")(__dirname);
const Promise = require("bluebird");
const CurrentSessionSubject = require("../subject-types/current-session-subject.js");
const SuperContext = locreq("lib/super-context.js");
const Errors = locreq("lib/response/error.js");
const Responses = locreq("lib/response/responses.js");
const Subject = locreq("lib/subject/subject.js");
function is_auth_data_valid (app, username, password){
return app.run_action(
new SuperContext(),
["collections", "users"],
"show",
{filter:{username: username, password: password}}
).then(function(results){
if (results.length === 1){
return results[0];
} else {
throw new Errors.InvalidCredentials("User/password mismatch");
}
});
}
function user_exists (username){
return new SuperContext()
.run_action(
["users", username],
"show"
);
}
function attemp_login (app, context, params){
let username, password;
let user;
let session;
return Promise.try(function(){
username = params.username;
password = params.password;
if (!username){
throw new Errors.InvalidCredentials("Missing username!");
}
if (!password){
throw new Errors.InvalidCredentials("Missing password!");
}
})
.then(function(){
return is_auth_data_valid(app, username, password)
.catch({type: "not_found"}, function(e){
return user_exists(username)
.then(function(){
throw new Errors.InvalidCredentials("Bad password");
})
.catch(Errors.Error, function(e){
throw new Errors.InvalidCredentials("Bad username");
});
});
})
.then(function(user_arg){
user = user_arg;
return app.run_action(new SuperContext(), ["collections", "sessions"], "create", {user: user.id, "session-id": null});
})
.then(function(session_arg){
session = session_arg;
return app.run_action(new SuperContext(), ["collections", "users", user.id], "edit", {last_login_context: context});
})
.then(function(){
return new Responses.NewSession(session.body["session-id"]);
});
}
const SessionsSubject = function(app){
this.perform_action = function(context, action_name, params){
params = params || {};
switch (action_name){
case "create":
return attemp_login(app, context, params);
default:
throw new Errors.DeveloperError(`Unknown/unsupported action '${action_name}' for Session Subject.`);
}
};
this.get_child_subject = function(key){
switch (key){
case "current":
return new CurrentSessionSubject(app);
default:
throw new Errors.BadSubjectPath(`No child subject with key '${key}' in SessionSubject`);
}
};
};
SessionsSubject.prototype = Object.create(Subject.prototype);
SessionsSubject.subject_name = "sessions";
module.exports = SessionsSubject;

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