forked from alediator/sir-geoexplorer-root
/
maps.js
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maps.js
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var SQLITE = require("../sqlite");
var FILE = require("fs");
var auth = require("../auth");
var System = Packages.java.lang.System;
var getDb = exports.getDb = function(request) {
var dataDir;
if (request) {
dataDir = request.env.servlet.getServletConfig().getInitParameter("GEOEXPLORER_DATA");
}
if (!dataDir) {
dataDir = String(
System.getProperty("GEOEXPLORER_DATA") ||
System.getenv("GEOEXPLORER_DATA") || "."
);
}
var db = FILE.join(dataDir, "geoexplorer.db");
// set up maps table
try {
var connection = SQLITE.open(db);
} catch (err) {
// TODO: nicer exception handling - this is hard for the user to find
throw new Error("Can't open '" + db + "' for writing. Set GEOEXPLORER_DATA to a writable directory.");
}
try {
var statement = connection.createStatement();
statement.executeUpdate(
"CREATE TABLE IF NOT EXISTS maps (" +
"id INTEGER PRIMARY KEY ASC, config BLOB" +
");"
);
} finally {
connection.close();
}
return db;
}
var createResponse = function(data, status) {
if (typeof data !== "string") {
data = JSON.stringify(data);
}
return {
status: status || 200,
headers: {
"Content-Type": "application/json"
},
body: [data]
};
};
var getConfig = function(request) {
var config = request.input.read().decodeToString(request.charset || "utf-8");
var obj;
try {
obj = JSON.parse(config);
} catch (err) {
config = null;
}
if (typeof obj !== "object" || Array.isArray(obj)) {
config = null;
}
return config;
};
var getId = function(env) {
var id = env.pathInfo.split("/")[1];
if (!id) {
// null means no id
id = null;
} else {
id = Number(id);
if (isNaN(id)) {
// false means invalid id
id = false;
}
}
return id;
};
function isAuthorized(request) {
return auth.getStatus(request) !== 401;
}
var handlers = {
"GET": function(request) {
var resp;
var id = getId(request);
if (id === null) {
// retrieve all map identifiers
resp = createResponse(getMapList(request));
} else if (id === false) {
// invalid id
resp = createResponse({error: "Invalid map id."}, 400);
} else {
// retrieve single map config
resp = createResponse(readMap(id, request));
}
return resp;
},
"POST": function(request) {
var resp;
if (isAuthorized(request)) {
var id = getId(request);
if (id !== null) {
resp = createResponse({error: "Can't POST to map " + id}, 405);
} else {
var config = getConfig(request);
if (!config) {
resp = createResponse({error: "Bad map config."}, 400);
} else {
// return the map id
resp = createResponse(createMap(config, request));
}
}
} else {
resp = createResponse({error: "Not authorized"}, 401);
}
return resp;
},
"PUT": function(request) {
var resp;
if (isAuthorized(request)) {
var id = getId(request);
if (id === null) {
resp = createResponse({error: "Can't PUT without map id."}, 405);
} else if (id === false) {
resp = createResponse({error: "Invalid map id."}, 400);
} else {
// valid map id
var config = getConfig(request);
if (!config) {
resp = createResponse({error: "Bad map config."}, 400);
} else {
resp = createResponse(updateMap(id, config, request));
}
}
} else {
resp = createResponse({error: "Not authorized"}, 401);
}
return resp;
},
"DELETE": function(request) {
var resp;
if (isAuthorized(request)) {
var id = getId(request);
if (id === null) {
resp = createResponse({error: "Can't DELETE without map id."}, 405);
} else if (id === false) {
resp = createResponse({error: "Invalid map id."}, 400);
} else {
resp = createResponse(deleteMap(id, request));
}
} else {
resp = createResponse({error: "Not authorized"}, 401);
}
return resp;
}
};
var getMapList = exports.getMapList = function(request) {
var connection = SQLITE.open(getDb(request));
try {
var statement = connection.createStatement();
var results = statement.executeQuery(
"SELECT id, config FROM maps;"
);
var items = [];
var config;
while (results.next()) {
config = JSON.parse(results.getString("config"));
items.push({
id: results.getInt("id"),
title: config.about && config.about.title,
"abstract": config.about && config.about["abstract"],
created: config.created,
modified: config.modified
});
}
results.close();
} finally {
connection.close();
}
// return all items
return {maps: items};
};
var createMap = exports.createMap = function(config, request) {
if (typeof config === "string") {
config = JSON.parse(config);
}
// add creation & modified date
var now = Date.now();
config.created = now;
config.modified = now;
config = JSON.stringify(config);
var connection = SQLITE.open(getDb(request));
try {
// store the new map config
var prep = connection.prepareStatement(
"INSERT INTO maps (config) VALUES (?);"
);
prep.setString(1, config);
prep.executeUpdate();
// get the map id
var statement = connection.createStatement();
var results = statement.executeQuery("SELECT last_insert_rowid() AS id;");
results.next();
var id = Number(results.getInt("id"));
results.close();
} finally {
connection.close();
}
// return the map id
return {id: id};
};
var readMap = exports.readMap = function(id, request) {
var config;
var connection = SQLITE.open(getDb(request));
try {
var prep = connection.prepareStatement(
"SELECT config FROM maps WHERE id = ?;"
);
prep.setInt(1, id);
var results = prep.executeQuery();
if (results.next()) {
// found map by id
config = JSON.parse(String(results.getString("config")));
} else {
// not found
throw {message: "No map with id " + id, code: 404};
}
results.close();
} finally {
connection.close();
}
return config;
};
var updateMap = exports.updateMap = function(id, config, request) {
if (typeof config === "string") {
config = JSON.parse(config);
}
// update modified date
config.modified = Date.now();
config = JSON.stringify(config);
var result;
var connection = SQLITE.open(getDb(request));
try {
var prep = connection.prepareStatement(
"UPDATE OR FAIL maps SET config = ? WHERE id = ?;"
);
prep.setString(1, config);
prep.setInt(2, id);
var rows = prep.executeUpdate();
} finally {
connection.close();
}
if (!rows) {
throw {message: "No map with id " + id, code: 404};
} else {
result = config;
}
return result;
}
var deleteMap = exports.deleteMap = function(id, request) {
var result;
var connection = SQLITE.open(getDb(request));
try {
var prep = connection.prepareStatement(
"DELETE FROM maps WHERE id = ?;"
);
prep.setInt(1, id);
var rows = prep.executeUpdate();
} finally {
connection.close();
}
if (!rows) {
throw {message: "No map with id " + id, code: 404};
} else {
result = {id: id};
}
return result;
};
exports.app = function(request) {
var resp;
var method = request.method;
var handler = handlers[method];
if (handler) {
try {
resp = handler(request);
} catch (x) {
resp = createResponse({error: x.message}, x.code || 500);
}
} else {
resp = createResponse({error: "Not allowed: " + method}, 405);
}
return resp;
};