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const compression = require ( "compression" ) ;
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const ejs = require ( "ejs" ) ;
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const express = require ( "express" ) ;
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const fs = require ( "fs" ) ;
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const http = require ( "http" ) ;
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const jsonFormat = require ( "json-format" ) ;
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const path = require ( "path" ) ;
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const Promise = require ( "bluebird" ) ;
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const database = require ( "./database/database" ) ;
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const geojson = require ( "./export/geojson" ) ;
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const gpx = require ( "./export/gpx" ) ;
const table = require ( "./export/table" ) ;
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const utils = require ( "./utils" ) ;
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const frontendPath = path . dirname ( require . resolve ( "facilmap-frontend/package.json" ) ) ; // Do not resolve main property
if ( process . env . FM _DEV )
process . chdir ( frontendPath ) ; // To make sure that webpack finds all the loaders
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const staticMiddleware = process . env . FM _DEV
? require ( "webpack-dev-middleware" ) ( require ( "webpack" ) ( require ( "facilmap-frontend/webpack.config" ) ) , { // require the stuff here so that it doesn't fail if devDependencies are not installed
publicPath : "/"
} )
: express . static ( frontendPath + "/build/" ) ;
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const webserver = {
init ( database , port , host ) {
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const padMiddleware = function ( req , res , next ) {
utils . promiseAuto ( {
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template : ( ) => webserver . getFrontendFile ( "index.ejs" ) ,
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padData : ( ) => {
if ( req . params && req . params . padId ) {
return database . getPadData ( req . params . padId ) . then ( ( padData ) => {
// We only look up by read ID. At the moment, we only need the data for the search engine
// meta tags, and those should be only enabled in the read-only version anyways.
if ( ! padData )
throw new Error ( ) ;
return padData ;
} ) . catch ( ( ) => {
// Error will be handled on the client side when it tries to fetch the pad data
return {
searchEngines : false ,
description : ""
} ;
} ) ;
}
} ,
render : ( template , padData ) => {
res . type ( "html" ) ;
res . send ( ejs . render ( template , {
padData : padData
} ) ) ;
}
} ) . catch ( next ) ;
} ;
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let app = express ( ) ;
app . use ( compression ( ) ) ;
app . get ( "/bundle-:hash.js" , function ( req , res , next ) {
res . setHeader ( 'Cache-Control' , 'public, max-age=31557600' ) ; // one year
next ( ) ;
} ) ;
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app . get ( "/" , padMiddleware ) ;
app . get ( "/index.ejs" , padMiddleware ) ;
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app . get ( "/table.ejs" , padMiddleware ) ;
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app . use ( staticMiddleware ) ;
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// If no file with this name has been found, we render a pad
app . get ( "/:padId" , padMiddleware ) ;
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app . get ( "/:padId/gpx" , function ( req , res , next ) {
utils . promiseAuto ( {
padData : database . getPadDataByAnyId ( req . params . padId ) . then ( ( padData ) => {
if ( ! padData )
throw new Error ( ` Map with ID ${ req . params . padId } could not be found. ` ) ;
return padData ;
} ) ,
gpx : ( padData ) => {
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return gpx . exportGpx ( database , padData ? padData . id : req . params . padId , req . query . useTracks == "1" , req . query . filter ) ;
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} ,
response : ( padData , gpx ) => {
res . set ( "Content-type" , "application/gpx+xml" ) ;
res . attachment ( padData . name . replace ( /[\\\/:*?"<>|]+/g , '_' ) + ".gpx" ) ;
res . send ( gpx ) ;
}
} ) . catch ( next ) ;
} ) ;
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app . get ( "/:padId/table" , function ( req , res , next ) {
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return table . createTable ( database , req . params . padId , req . query . filter ) . then ( ( renderedTable ) => {
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res . type ( "html" ) ;
res . send ( renderedTable ) ;
} ) . catch ( next ) ;
} ) ;
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app . get ( "/:padId/geojson" , function ( req , res , next ) {
utils . promiseAuto ( {
padData : database . getPadData ( req . params . padId ) . then ( ( padData ) => {
if ( ! padData )
throw new Error ( ` Map with ID ${ req . params . padId } could not be found. ` ) ;
return padData ;
} ) ,
geojson : ( ) => {
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return geojson . exportGeoJson ( database , req . params . padId , req . query . filter ) ;
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} ,
response : ( padData , geojson ) => {
res . set ( "Content-type" , "application/geo+json" ) ;
res . attachment ( padData . name . replace ( /[\\\/:*?"<>|]+/g , '_' ) + ".geojson" ) ;
res . send ( jsonFormat ( geojson ) ) ;
}
} ) . catch ( next ) ;
} ) ;
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let server = http . createServer ( app ) ;
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return Promise . promisify ( server . listen . bind ( server ) ) ( port , host ) . then ( ( ) => server ) ;
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} ,
getFrontendFile ( path ) {
if ( process . env . FM _DEV ) {
return new Promise ( ( resolve , reject ) => {
staticMiddleware . waitUntilValid ( resolve ) ;
} ) . then ( ( ) => {
return staticMiddleware . fileSystem . readFileSync ( staticMiddleware . getFilenameFromUrl ( ` / ${ path } ` ) , "utf8" ) ;
} ) ;
} else {
// We don't want express.static's ETag handling, as it sometimes returns an empty template,
// so we have to read it directly from the file system
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return Promise . promisify ( fs . readFile ) ( ` ${ frontendPath } /build/ ${ path } ` , "utf8" ) ;
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}
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}
} ;
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Object . assign ( exports , webserver ) ;