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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| const { getConfig } = require('./config') | ||
| const sessionInCookie = require('client-sessions') | ||
| const sessionInMemory = require('express-session') | ||
| const path = require('path') | ||
| const { projectDir } = require('./path-utils') | ||
| const { get: getKeypath } = require('lodash') | ||
|
|
||
| // Add Nunjucks function called 'checked' to populate radios and checkboxes | ||
| const addCheckedFunction = function (env) { | ||
| env.addGlobal('checked', function (name, value) { | ||
| // Check data exists | ||
| if (this.ctx.data === undefined) { | ||
| return '' | ||
| } | ||
|
|
||
| // Use string keys or object notation to support: | ||
| // checked("field-name") | ||
| // checked("['field-name']") | ||
| // checked("['parent']['field-name']") | ||
| name = !name.match(/[.[]/g) ? `['${name}']` : name | ||
| var storedValue = getKeypath(this.ctx.data, name) | ||
|
|
||
| // Check the requested data exists | ||
| if (storedValue === undefined) { | ||
| return '' | ||
| } | ||
|
|
||
| var checked = '' | ||
|
|
||
| // If data is an array, check it exists in the array | ||
| if (Array.isArray(storedValue)) { | ||
| if (storedValue.indexOf(value) !== -1) { | ||
| checked = 'checked' | ||
| } | ||
| } else { | ||
| // The data is just a simple value, check it matches | ||
| if (storedValue === value) { | ||
| checked = 'checked' | ||
| } | ||
| } | ||
| return checked | ||
| }) | ||
| } | ||
|
|
||
| // Store data from POST body or GET query in session | ||
| const storeData = function (input, data) { | ||
| for (const i in input) { | ||
| // any input where the name starts with _ is ignored | ||
| if (i.indexOf('_') === 0) { | ||
| continue | ||
| } | ||
|
|
||
| let val = input[i] | ||
|
|
||
| // Delete values when users unselect checkboxes | ||
| if (val === '_unchecked' || val === ['_unchecked']) { | ||
| delete data[i] | ||
| continue | ||
| } | ||
|
|
||
| // Remove _unchecked from arrays of checkboxes | ||
| if (Array.isArray(val)) { | ||
| val = val.filter((item) => item !== '_unchecked') | ||
| } else if (typeof val === 'object') { | ||
| // Store nested objects that aren't arrays | ||
| if (typeof data[i] !== 'object') { | ||
| data[i] = {} | ||
| } | ||
|
|
||
| // Add nested values | ||
| storeData(val, data[i]) | ||
| continue | ||
| } | ||
|
|
||
| data[i] = val | ||
| } | ||
| } | ||
|
|
||
| // Get session default data from file | ||
|
|
||
| let sessionDataDefaults | ||
|
|
||
| const sessionDataDefaultsFile = path.join(projectDir, 'app', 'data', 'session-data-defaults.js') | ||
|
|
||
| try { | ||
| sessionDataDefaults = require(sessionDataDefaultsFile) | ||
| } catch (e) { | ||
| sessionDataDefaults = {} | ||
| } | ||
| // Middleware - store any data sent in session, and pass it to all views | ||
|
|
||
| const autoStoreData = function (req, res, next) { | ||
| if (!req.session.data) { | ||
| req.session.data = {} | ||
| } | ||
|
|
||
| req.session.data = Object.assign({}, sessionDataDefaults, req.session.data) | ||
|
|
||
| storeData(req.body, req.session.data) | ||
| storeData(req.query, req.session.data) | ||
|
|
||
| // Send session data to all views | ||
|
|
||
| res.locals.data = {} | ||
|
|
||
| for (var j in req.session.data) { | ||
| res.locals.data[j] = req.session.data[j] | ||
| } | ||
|
|
||
| next() | ||
| } | ||
|
|
||
| const getSessionNameFromServiceName = (serviceName) => { | ||
| return 'govuk-prototype-kit-' + (Buffer.from(serviceName, 'utf8')).toString('hex') | ||
| } | ||
|
|
||
| const getSessionMiddleware = () => { | ||
| // Session uses service name to avoid clashes with other prototypes | ||
| const sessionName = getSessionNameFromServiceName(getConfig().serviceName) | ||
| const sessionHours = 4 | ||
| const sessionOptions = { | ||
| secret: sessionName, | ||
| cookie: { | ||
| maxAge: 1000 * 60 * 60 * sessionHours, | ||
| secure: getConfig().isSecure | ||
| } | ||
| } | ||
|
|
||
| // Support session data in cookie or memory | ||
| if (getConfig().useCookieSessionStore) { | ||
| return sessionInCookie(Object.assign(sessionOptions, { | ||
| cookieName: sessionName, | ||
| proxy: true, | ||
| requestKey: 'session' | ||
| })) | ||
| } else { | ||
| return sessionInMemory(Object.assign(sessionOptions, { | ||
| name: sessionName, | ||
| resave: false, | ||
| saveUninitialized: false | ||
| })) | ||
| } | ||
| } | ||
|
|
||
| module.exports = { | ||
| addCheckedFunction, | ||
| getSessionMiddleware, | ||
| autoStoreData | ||
| } |
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