1 files changed, 81 insertions, 0 deletions
diff --git a/bin/mr.js b/bin/mr.js
new file mode 100755
index 0000000..a016db2
--- /dev/null
+++ b/bin/mr.js
@@ -0,0 +1,81 @@
+#!/usr/bin/env node
+
+/**
+ * Create a MapRoulette Cooperative Challenge from the exact matches,
+ * which suggests updating the OSM objects tags with those from Vicmap.
+ * 
+ * https://github.com/osmlab/maproulette3/wiki/Cooperative-Challenges
+ */
+
+// TODO need a higher level json structre
+// TODO maybe these need to be grouped by block?
+
+const fs = require('fs')
+const { Transform, pipeline } = require('stream')
+const ndjson = require('ndjson')
+const omit = require('object.omit')
+const path = require('path')
+
+const argv = require('yargs/yargs')(process.argv.slice(2))
+  .argv
+
+if (argv._.length < 2) {
+  console.error("Usage: ./mr.js dist/conflate dist/mr.geojson")
+  process.exit(1)
+}
+
+const sourceDirectory = argv._[0]
+const outputFile = argv._[1]
+
+if (!fs.existsSync(path.join(sourceDirectory, 'exactMatch.geojson'))) {
+  console.error(`${path.join(sourceDirectory, 'exactMatch.geojson')} not found`)
+  process.exit(1)
+}
+
+let sourceCount = 0
+const mr = new Transform({
+  readableObjectMode: true,
+  writableObjectMode: true,
+  transform(feature, encoding, callback) {
+    sourceCount++
+
+    if (process.stdout.isTTY && sourceCount % 10000 === 0) {
+      process.stdout.write(` ${sourceCount / 1000}k\r`)
+    }
+
+    const matches = feature.properties._matches.split(',')
+
+    for (const match of matches) {
+      const operation = {
+        operationType: 'modifyElement',
+        data: {
+          id: match,
+          operations: [{
+            operation: 'setTags',
+            data: omit(feature.properties, '_matches')
+          }]
+        }
+      }
+
+      this.push(operation)
+    }
+
+    callback()
+  }
+})
+
+pipeline(
+  fs.createReadStream(path.join(sourceDirectory, 'exactMatch.geojson')),
+  ndjson.parse(),
+  mr,
+  ndjson.stringify(),
+  fs.createWriteStream(outputFile),
+  err => {
+    if (err) {
+      console.log(err)
+      process.exit(1)
+    } else {
+      process.exit(0)
+    }
+  }
+)