chore: implements mapper

src/mapper.ts

@@ -8,9 +8,40 @@ export interface MapperResult {
   subId: string[]
 }
 
-export function mapper(_matches: MapperMatch[]): MapperResult {
-  return {
-    idMap: [],
-    subId: [],
+function createIdMap(matches: MapperMatch[]): string[] {
+  const buffer: string[] = []
+
+  for (const [index, match] of matches.entries()) {
+    const { containerId, hostId } = match
+
+    if (index === 0) {
+      buffer.push(`0 100000 ${containerId}`)
+    } else if (matches[index].containerId !== matches[index - 1].containerId + 1) {
+      buffer.push(`${matches[index - 1].containerId + 1} ${matches[index - 1].containerId + 100001} ${containerId - matches[index - 1].containerId}`)
+    }
+
+    buffer.push(`${containerId} ${hostId} 1`)
+
+    if (index === matches.length - 1) {
+      buffer.push(`${containerId + 1} ${containerId + 100001} ${65535 - containerId}`)
+    }
   }
+
+  return buffer
+}
+
+function createSubId(matches: MapperMatch[]): string[] {
+  return matches.map((match) => `root:${match.hostId}:1`)
+}
+
+function sortMatches(matches: MapperMatch[]): MapperMatch[] {
+  return matches.toSorted((a, b) => a.containerId - b.containerId)
+}
+
+export function mapper(matches: MapperMatch[]): MapperResult {
+  const sortedMatches = sortMatches(matches)
+  const idMap = createIdMap(sortedMatches)
+  const subId = createSubId(sortedMatches)
+
+  return { idMap, subId }
 }