Wrapper: add installedRepos observable (#268)

Adds an `installedRepos` observable that emits an array of `InstalledRepos`.

packages/aragon-wrapper/src/core/apm/index.js

@@ -0,0 +1,30 @@
+import { makeProxy } from '../../utils'
+
+export async function makeRepoProxy (appId, apm, web3) {
+  const repoAddress = await apm.ensResolve(appId)
+  return makeProxy(repoAddress, 'Repo', web3)
+}
+
+export async function getAllRepoVersions (repoProxy) {
+  const versions = []
+  const versionCount = await repoProxy.call('getVersionsCount')
+
+  // Versions index starts at 1
+  for (let versionId = 1; versionId <= versionCount; ++versionId) {
+    versions.push(await getRepoVersionById(repoProxy, versionId))
+  }
+
+  return Promise.all(versions)
+}
+
+export function getRepoVersionById (repoProxy, versionId) {
+  return repoProxy
+    .call('getByVersionId', versionId)
+    .then(({ contentURI, contractAddress, semanticVersion }) => ({
+      contentURI,
+      contractAddress,
+      version: semanticVersion.join('.'),
+      // Keeping this as a string makes comparisons a bit easier down the line
+      versionId: versionId.toString()
+    }))
+}

packages/aragon-wrapper/src/core/aragonOS/index.js

@@ -40,4 +40,12 @@ function getKernelNamespace (hash) {
   }
 }
 
-export { getAragonOsInternalAppInfo, getKernelNamespace }
+function isAragonOsInternalApp (appId) {
+  return APP_MAPPINGS.has(appId)
+}
+
+export {
+  getAragonOsInternalAppInfo,
+  getKernelNamespace,
+  isAragonOsInternalApp
+}