Use stable textual ids for streams

babel.config.json

@@ -12,6 +12,7 @@
     ]
   ],
   "plugins": [
+    "@babel/plugin-proposal-optional-chaining",
     "babel-plugin-styled-components",
     [
       "@babel/plugin-transform-react-jsx",

package.json

@@ -24,6 +24,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.10.2",
+    "@babel/plugin-proposal-optional-chaining": "^7.10.1",
     "@babel/plugin-transform-react-jsx": "^7.10.1",
     "@babel/preset-env": "^7.10.2",
     "@svgr/webpack": "^5.4.0",

src/browser/control.js

@@ -19,19 +19,19 @@ function App() {
   }, [])
 
   const handleSetSpace = useCallback(
-    (idx, value) => {
+    (idx, id) => {
       const newSpaceIdxMap = new Map(spaceIdxMap)
-      if (value !== undefined) {
-        newSpaceIdxMap.set(idx, value)
+      if (id !== undefined) {
+        newSpaceIdxMap.set(idx, id)
       } else {
         newSpaceIdxMap.delete(idx)
       }
       setSpaceIdxMap(newSpaceIdxMap)
 
       const newSpaceURLMap = new Map(
-        Array.from(newSpaceIdxMap, ([spaceIdx, dataIdx]) => [
+        Array.from(newSpaceIdxMap, ([spaceIdx, streamId]) => [
           spaceIdx,
-          streamData[dataIdx].Link,
+          streamData.find((d) => d._id === streamId)?.Link,
         ]),
       )
       ipcRenderer.send('set-videos', newSpaceURLMap)
@@ -71,17 +71,17 @@ function App() {
       </div>
       <div>
         {streamData
-          ? streamData.map((row, idx) => <StreamLine idx={idx} row={row} />)
+          ? streamData.map((row) => <StreamLine id={row._id} row={row} />)
           : 'loading...'}
       </div>
     </div>
   )
 }
 
-function StreamLine({ idx, row: { Source, Title, Link, Notes } }) {
+function StreamLine({ id, row: { Source, Title, Link, Notes } }) {
   return (
     <StyledStreamLine>
-      <StyledIdx>{idx}</StyledIdx>
+      <StyledId>{id}</StyledId>
       <div>
         <strong>{Source}</strong> <a href={Link}>{Title || Link}</a> {Notes}
       </div>
@@ -99,11 +99,7 @@ function GridInput({
   const handleChange = useCallback(
     (ev) => {
       const { name, value } = ev.target
-      const newValue = value ? Number(value) : NaN
-      onChangeSpace(
-        Number(name),
-        Number.isFinite(newValue) ? newValue : undefined,
-      )
+      onChangeSpace(Number(name), value)
     },
     [onChangeSpace],
   )
@@ -185,14 +181,14 @@ const StyledGridInput = styled.input`
   }
 `
 
-const StyledIdx = styled.div`
+const StyledId = styled.div`
   flex-shrink: 0;
   margin-right: 5px;
   background: #333;
   color: white;
   padding: 3px;
   border-radius: 5px;
-  width: 2em;
+  width: 3em;
   text-align: center;
 `
 

src/node/data.js

@@ -45,3 +45,29 @@ export async function* pollSpreadsheetData(creds, sheetId, tabName) {
     await sleep(refreshInterval)
   }
 }
+
+export async function* processData(dataGen) {
+  // Give each stream a unique and recognizable short id.
+  const idMap = new Map()
+  for await (const data of dataGen) {
+    for (const stream of data) {
+      const { Link, Source } = stream
+      if (!idMap.has(Link)) {
+        let counter = 0
+        let newId
+        const normalizedSource = Source.toLowerCase()
+          .replace(/[^\w]/g, '')
+          .replace(/^the|^https?(www)?/, '')
+        do {
+          const sourcePart = normalizedSource.substr(0, 3).toLowerCase()
+          const counterPart = counter === 0 ? '' : counter
+          newId = `${sourcePart}${counterPart}`
+          counter++
+        } while (idMap.has(newId))
+        idMap.set(Link, newId)
+      }
+      stream._id = idMap.get(Link)
+    }
+    yield data
+  }
+}

src/node/index.js

@@ -3,7 +3,7 @@ import yargs from 'yargs'
 import { app, BrowserWindow, BrowserView, ipcMain, shell } from 'electron'
 import { interpret } from 'xstate'
 
-import { pollPublicData, pollSpreadsheetData } from './data'
+import { pollPublicData, pollSpreadsheetData, processData } from './data'
 import viewStateMachine from './viewStateMachine'
 import { boxesFromSpaceURLMap } from './geometry'
 
@@ -177,7 +177,7 @@ async function main() {
     dataGen = pollPublicData()
   }
 
-  for await (const data of dataGen) {
+  for await (const data of processData(dataGen)) {
     mainWin.webContents.send('stream-data', data)
     overlayView.webContents.send('stream-data', data)
   }