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renumber.js
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renumber.js
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#!/usr/bin/env node
"use strict";
const fs = require("fs"),
path = require("path");
const async = require("async"),
yaml = require("js-yaml"),
yargs = require("yargs");
const ENTITY_TYPES = {
n: "nodes",
w: "ways",
r: "relations",
};
const argv = yargs
.usage("Usage: $0 [-m id map]")
.demand("m")
.argv;
try {
const stats = fs.statSync(path.resolve(argv.m));
if (stats.size === 0) {
console.warn("Placeholder map is empty; skipping.");
process.exit(0);
}
} catch (err) {
console.warn("Placeholder map does not exist; skipping.");
process.exit(0);
}
// load placeholders w/ an empty object as a fallback
const placeholders = JSON.parse(fs.readFileSync(path.resolve(argv.m), "utf8"));
placeholders.nodes = placeholders.nodes || {};
placeholders.ways = placeholders.ways || {};
placeholders.relations = placeholders.relations || {};
// rename files if necessary
["nodes", "ways", "relations"].forEach(entityType => {
Object.keys(placeholders[entityType]).forEach(oldId => {
const newId = placeholders[entityType][oldId],
srcPath = path.resolve(path.join(entityType, oldId + ".yaml")),
dstPath = path.resolve(path.join(entityType, newId + ".yaml"));
try {
// verify that the source file exists
fs.accessSync(srcPath);
// delete the target (if it exists)
try {
fs.unlinkSync(dstPath);
} catch (err) {
// target file (probably) doesn't exist
if (err.code !== "ENOENT") {
console.warn(err.stack);
}
}
// link the source to the target
fs.linkSync(srcPath, dstPath);
// delete the source
fs.unlinkSync(srcPath);
} catch (err) {
if (err.code !== "ENOENT") {
console.warn(err.stack);
}
}
});
});
// gather ids to check whether remapping is necessary
const nodeIds = Object.keys(placeholders.nodes).map(Number),
wayIds = Object.keys(placeholders.ways).map(Number),
relationIds = Object.keys(placeholders.relations).map(Number);
console.warn("Tracking %d remapped ids", nodeIds.length + wayIds.length + relationIds.length);
let ways = [],
relations = [];
try {
ways = fs.readdirSync(path.resolve("ways"))
.filter(filename => path.extname(filename) === ".yaml");
} catch (err) {
if (err.code !== "ENOENT") {
console.warn(err.stack);
}
}
try {
relations = fs.readdirSync(path.resolve("relations"))
.filter(filename => path.extname(filename) === ".yaml");
} catch (err) {
if (err.code !== "ENOENT") {
console.warn(err.stack);
}
}
console.warn("Checking %d ways", ways.length);
console.warn("Checking %d relations", relations.length);
async.eachLimit(ways, 50, (filename, next) => {
const entityPath = path.resolve(path.join("ways", filename));
return fs.readFile(entityPath, (err, data) => {
if (err) {
return next(err);
}
try {
const entity = yaml.safeLoad(data);
if (entity.nds.some(nd => nodeIds.indexOf(nd) >= 0)) {
console.warn("%s has nds that need to be rewritten", filename);
entity.nds = entity.nds.map(nd => Number(placeholders.nodes[nd]) || nd);
return fs.writeFile(entityPath, yaml.safeDump(entity), "utf8", next);
}
return next();
} catch (err) {
console.log("Error handling %s", filename);
return next(err);
}
});
}, err => {
if (err) {
throw err;
}
});
async.eachLimit(relations, 50, (filename, next) => {
const entityPath = path.resolve(path.join("relations", filename));
return fs.readFile(entityPath, (err, data) => {
if (err) {
return next(err);
}
const entity = yaml.safeLoad(data);
if (entity.members.some(member => member.type === "n" && nodeIds.indexOf(member.ref) >= 0) ||
entity.members.some(member => member.type === "w" && wayIds.indexOf(member.ref) >= 0) ||
entity.members.some(member => member.type === "r" && relationIds.indexOf(member.ref) >= 0)) {
console.warn("%s has members that need to be rewritten", filename);
entity.members = entity.members.map(member => {
return {
type: member.type,
ref: Number(placeholders[ENTITY_TYPES[member.type]][member.ref]) || member.ref,
role: member.role,
};
});
return fs.writeFile(entityPath, yaml.safeDump(entity), "utf8", next);
}
return next();
})
}, err => {
if (err) {
throw err;
}
});