[EDU-1691] - Add pub-sub rewind example #2436
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Important Review skippedAuto reviews are disabled on this repository. Please check the settings in the CodeRabbit UI or the You can disable this status message by setting the WalkthroughThis pull request introduces a full demo of a Pub/Sub rewind channel implemented in both JavaScript and React. It adds new environment variables and configuration files (for Vite, Next.js, Tailwind CSS, TypeScript, and ESLint), along with HTML, TypeScript, and React component implementations that utilize Ably’s real-time messaging. Comprehensive documentation is provided for both demos, ensuring that users understand how to set up, run, and interact with the live data updates and rewind functionalities. Changes
Sequence Diagram(s)sequenceDiagram
participant User as User
participant Browser as Browser App (JS)
participant Ably as Ably Service
participant UI as UI Components
User->>Browser: Load application
Browser->>Ably: Connect using VITE_PUBLIC_ABLY_KEY
Browser->>Ably: Subscribe to channel
Ably-->>Browser: Send odds update message
Browser->>UI: Update current odds & history
UI-->>User: Display updated match data
sequenceDiagram
participant User as User
participant Browser as Browser App (React)
participant Ably as Ably Service
participant Router as Next.js Router
User->>Browser: Click "Load Odds" button
Browser->>Ably: Preload odds history with NEXT_PUBLIC_ABLY_KEY
Ably-->>Browser: Receive match odds updates
Browser->>UI: Update LiveMatch component with new odds
Browser->>Router: Redirect to updated odds page
UI-->>User: Display real-time match updates
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Actionable comments posted: 11
🧹 Nitpick comments (22)
examples/pub-sub-rewind/react/.env.example (1)
1-1: Appropriate naming convention for Next.js environment variableThe environment variable follows Next.js naming convention with the
NEXT_PUBLIC_prefix, indicating it will be exposed to the browser. This is correct for client-side Ably API key usage.Consider adding a brief comment explaining how to obtain an Ably API key for new developers who might be using this example.
-NEXT_PUBLIC_ABLY_KEY= +# Get your Ably API key from https://ably.com/dashboard +NEXT_PUBLIC_ABLY_KEY=examples/pub-sub-rewind/javascript/.env.example (1)
1-1: Appropriate naming convention for Vite environment variableThe environment variable correctly follows Vite's naming convention with the
VITE_prefix, ensuring it will be accessible in client-side code.Consider adding a brief comment explaining how to obtain an Ably API key for new developers.
-VITE_PUBLIC_ABLY_KEY= +# Get your Ably API key from https://ably.com/dashboard +VITE_PUBLIC_ABLY_KEY=examples/pub-sub-rewind/react/next.config.ts (1)
1-8: Next.js Config File is CorrectThe configuration uses the correct type import and structure. The placeholder comment ("/* config options here */") indicates where project-specific options can be added later. Consider replacing it with actual options once requirements are finalized.
examples/pub-sub-rewind/javascript/vite.config.ts (1)
1-12: Address Vite config syntax according to project style guide.The configuration is correctly set up with TailwindCSS and Autoprefixer, which is appropriate for a styling pipeline. However, there are formatting issues that should be addressed to match the project's style guide.
-import { defineConfig } from 'vite' +import { defineConfig } from 'vite'; export default defineConfig({ css: { postcss: { plugins: [ - require('tailwindcss'), - require('autoprefixer'), + require('tailwindcss'), require('autoprefixer') ], - } - } -}) + }, + }, +});🧰 Tools
🪛 ESLint
[error] 1-1: Insert
;(prettier/prettier)
[error] 6-9: Replace
⏎········require('tailwindcss'),⏎········require('autoprefixer'),⏎······withrequire('tailwindcss'),·require('autoprefixer')(prettier/prettier)
[error] 10-10: Insert
,(prettier/prettier)
[error] 11-11: Insert
,(prettier/prettier)
[error] 12-12: Insert
;⏎(prettier/prettier)
examples/pub-sub-rewind/javascript/README.md (1)
25-25: Consider adding a comma after ".env.local" for better readability.-4. In `.env.local` update the value of `VITE_PUBLIC_ABLY_KEY` to be your Ably API key. +4. In `.env.local`, update the value of `VITE_PUBLIC_ABLY_KEY` to be your Ably API key.🧰 Tools
🪛 LanguageTool
[uncategorized] ~25-~25: Possible missing comma found.
Context: ...mple .env.local ``` 4. In.env.localupdate the value of `VITE_PUBLIC_ABLY_KEY` to ...(AI_HYDRA_LEO_MISSING_COMMA)
[style] ~25-~25: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...ue ofVITE_PUBLIC_ABLY_KEYto be your Ably API key. 5. Install dependencies: ```...(ADVERB_REPETITION_PREMIUM)
examples/pub-sub-rewind/javascript/.gitignore (1)
12-14: Consider removing Next.js specific patterns for a Vite project.The file includes Next.js specific patterns (
/.next/,/out/), but this appears to be a Vite project based on the presence ofvite.config.ts. If this example doesn't use Next.js, these patterns could be removed.-# next.js -/.next/ -/out/examples/pub-sub-rewind/react/src/app/layout.tsx (1)
15-17: Fix indentation in the body element.The children element has inconsistent indentation compared to the rest of the component structure.
<html lang="en"> <body className={inter.className}> - {children} + {children} </body> </html>examples/pub-sub-rewind/javascript/tsconfig.json (1)
8-8: Consider using ESM modules instead of CommonJS for browser applications.While
commonjsworks, modern browser applications typically use ES modules. This might be intentional if your build process transforms the modules, but if not, consider changing to:- "module": "commonjs", + "module": "ESNext",This would better align with modern web development practices and potentially enable better tree-shaking.
examples/pub-sub-rewind/react/README.md (1)
39-39: Consider adding more context about the demo functionality.The README explains how to set up and run the example but doesn't describe what users will see or how to interact with the demo once it's running. Consider adding a brief section explaining:
- What the interface looks like
- How to use the rewind feature in the demo
- What interactions are available
- Any example messages that might be displayed
This would help users better understand what they're seeing when they access the application.
examples/pub-sub-rewind/javascript/index.html (1)
1-89: HTML Markup is Clean and Structured
The file provides a clear structure with distinct sections (landing and game interface) and uses Tailwind CSS classes effectively. Consider enhancing semantic accessibility (e.g., using<main>or<section>tags) and ARIA attributes where appropriate to further improve accessibility.examples/pub-sub-rewind/page.md (3)
1-10: Documentation Introduction – Clarity and Redundancy
The introductory section clearly explains the rewind feature. However, note that phrases regarding retrieving historical messages appear a bit redundant (e.g., lines 5 and 7). Consider streamlining the text for improved clarity and conciseness.🧰 Tools
🪛 LanguageTool
[uncategorized] ~5-~5: Possible missing article found.
Context: ... start working in your application with context of what happened before they went joine...(AI_HYDRA_LEO_MISSING_THE)
11-24: Example Briefs for React and JavaScript
The React and JavaScript briefs provide valuable contextual information and link to relevant Ably documentation. A minor suggestion: review punctuation and phrasing (e.g., ensure that any informal markers like// React briefare either styled as proper markdown comments or integrated into the documentation narrative) for consistency.🧰 Tools
🪛 LanguageTool
[uncategorized] ~17-~17: Loose punctuation mark.
Context: ...ocs/getting-started/react#ably-provider): initializes and manages a shared pub/su...(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~18-~18: Loose punctuation mark.
Context: .../getting-started/react#channel-provider): manages the state and functionality of ...(UNLIKELY_OPENING_PUNCTUATION)
112-119: CodeSandbox Instructions – Avoid Repetitive Phrasing
Both the React and JavaScript CodeSandbox instructions repeat nearly identical steps for renaming the environment file and updating the API key variable. Consider consolidating these instructions or rephrasing to avoid adverb repetition (as noted by static analysis). For example, you might reword to:"In CodeSandbox, rename the
.env.examplefile to.env.localand update the corresponding API key variable with your Ably API key."🧰 Tools
🪛 LanguageTool
[style] ~114-~114: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...T_PUBLIC_ABLY_KEY` variable to use your Ably API key. // Javascript In CodeSandbox...(ADVERB_REPETITION_PREMIUM)
[style] ~118-~118: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...E_PUBLIC_ABLY_KEY` variable to use your Ably API key.(ADVERB_REPETITION_PREMIUM)
examples/pub-sub-rewind/react/src/app/page.tsx (3)
17-20: Add error handling for Ably client initialization.The Ably client initialization lacks error handling, which might cause silent failures if the connection cannot be established.
const client = new Ably.Realtime({ key: process.env.NEXT_PUBLIC_ABLY_KEY, clientId, + autoConnect: true, }); + + client.connection.on('failed', (err) => { + console.error('Ably connection failed:', err); + setIsLoading(false); + });
45-75: Add cleanup for asynchronous operations to prevent memory leaks.The asynchronous loop and timeout operations should be properly cleaned up if the component unmounts during their execution.
const preloadOddsHistory = async () => { setIsLoading(true); + let isMounted = true; // Flag to track if component is mounted const clientId = faker.person.firstName(); const client = new Ably.Realtime({ key: process.env.NEXT_PUBLIC_ABLY_KEY, clientId, }); const channel = client.channels.get(channelName); const homeTeam = "Royal Knights"; const awayTeam = "North Rangers"; // ... [rest of the code remains the same] for (let i = 0; i < 10; i++) { + if (!isMounted) break; // Stop if component unmounted // ... [loop content remains the same] // Adjust timeout handling await new Promise(resolve => { + const timeoutId = setTimeout(resolve, 1000); + // Allow for cleanup if component unmounts + return () => clearTimeout(timeoutId); }); } + if (isMounted) { router.push(`/odds?name=${encodeURIComponent(channelName)}`); + } + + // Return cleanup function + return () => { + isMounted = false; + client.close(); // Close Ably connection + }; };Then in your component:
+ useEffect(() => { + let cleanup; + if (isLoading) { + cleanup = preloadOddsHistory(); + } + return () => { + if (cleanup) cleanup(); + }; + }, [isLoading]);
8-102: Extract the odds update logic into a reusable utility function.The odds update logic is duplicated across the application (in both page.tsx and odds/page.tsx). Extract this into a utility function to improve maintainability.
Consider creating a utility file
utils/oddsUpdate.tswith:export interface MatchOdds { match: { homeTeam: string; awayTeam: string; timestamp: string; score: string; matchOdds: { homeWin: string; draw: string; awayWin: string; }; nextGoal: { [key: string]: string; }; }; } export function updateRandomOdds(currentOdds: MatchOdds): MatchOdds { const markets = ['homeWin', 'draw', 'awayWin', 'nextGoal']; const numMarketsToUpdate = Math.floor(Math.random() * 2) + 1; const marketsToUpdate = markets.sort(() => 0.5 - Math.random()).slice(0, numMarketsToUpdate); const newOdds = { ...currentOdds }; marketsToUpdate.forEach(market => { if (market === 'nextGoal') { const team = Object.keys(newOdds.match.nextGoal)[Math.floor(Math.random() * 3)]; newOdds.match.nextGoal[team] = ( parseFloat(newOdds.match.nextGoal[team]) + (Math.random() * 0.2 - 0.1) ).toFixed(2); } else { newOdds.match.matchOdds[market] = ( parseFloat(newOdds.match.matchOdds[market]) + (Math.random() * 0.2 - 0.1) ).toFixed(2); } }); newOdds.match.timestamp = new Date().toISOString(); return newOdds; }Then simplify your update logic in both files by importing and using this function.
examples/pub-sub-rewind/react/src/app/odds/page.tsx (3)
86-162: Add loading state for initial data fetch.The component doesn't handle the loading state before receiving the first data, which can result in a poor user experience.
return ( <div className="min-h-screen bg-gray-100 p-8"> <div className="max-w-4xl mx-auto"> + {!matchData && ( + <div className="bg-white rounded-lg shadow-lg p-6 mb-8 flex justify-center items-center min-h-[200px]"> + <div className="text-center"> + <div className="inline-block h-8 w-8 animate-spin rounded-full border-4 border-solid border-current border-r-transparent align-[-0.125em] motion-reduce:animate-[spin_1.5s_linear_infinite] mr-2"></div> + <span>Loading match data...</span> + </div> + </div> + )} {matchData && ( // ... [existing code] )} </div> </div> );
96-97: Improve the mobile view with more responsive design techniques.The current approach for handling responsive design is using simple abbreviations. Consider using a more sophisticated approach.
<span className="hidden sm:inline">{matchData.match.homeTeam}</span> - <span className="sm:hidden"> - {matchData.match.homeTeam.split(' ').map(word => word[0]).join(' ')} - </span> + <span className="sm:hidden"> + {matchData.match.homeTeam.length > 10 + ? `${matchData.match.homeTeam.substring(0, 10)}...` + : matchData.match.homeTeam} + </span>Apply similar changes to the away team abbreviation.
Also applies to: 104-106
70-73: Ensure numeric values are properly validated before arithmetic operations.There's a potential issue if the parsed odds value is NaN, which would result in invalid calculations.
if (market === 'nextGoal') { const team = Object.keys(newOdds.match.nextGoal)[Math.floor(Math.random() * 3)]; - newOdds.match.nextGoal[team] = (parseFloat(newOdds.match.nextGoal[team]) + (Math.random() * 0.2 - 0.1)).toFixed(2); + const currentOdds = parseFloat(newOdds.match.nextGoal[team]); + if (!isNaN(currentOdds)) { + newOdds.match.nextGoal[team] = (currentOdds + (Math.random() * 0.2 - 0.1)).toFixed(2); + } } else {Apply similar changes to the matchOdds calculation as well.
examples/pub-sub-rewind/javascript/src/script.ts (3)
86-91: Ensure numeric values are properly validated before arithmetic operations.There's a potential issue if the parsed odds value is NaN, which would result in invalid calculations.
if (market === 'nextGoal') { const team = Object.keys(matchData.match.nextGoal)[Math.floor(Math.random() * 3)]; - matchData.match.nextGoal[team] = (parseFloat(matchData.match.nextGoal[team]) + (Math.random() * 0.2 - 0.1)).toFixed(2); + const currentOdds = parseFloat(matchData.match.nextGoal[team]); + if (!isNaN(currentOdds)) { + matchData.match.nextGoal[team] = (currentOdds + (Math.random() * 0.2 - 0.1)).toFixed(2); + } } else { - matchData.match.matchOdds[market] = (parseFloat(matchData.match.matchOdds[market]) + (Math.random() * 0.2 - 0.1)).toFixed(2); + const currentOdds = parseFloat(matchData.match.matchOdds[market]); + if (!isNaN(currentOdds)) { + matchData.match.matchOdds[market] = (currentOdds + (Math.random() * 0.2 - 0.1)).toFixed(2); + } }🧰 Tools
🪛 ESLint
[error] 88-88: Replace
parseFloat(matchData.match.nextGoal[team])·+·(Math.random()·*·0.2·-·0.1)with⏎··········parseFloat(matchData.match.nextGoal[team])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········(prettier/prettier)
[error] 90-90: Replace
parseFloat(matchData.match.matchOdds[market])·+·(Math.random()·*·0.2·-·0.1)with⏎··········parseFloat(matchData.match.matchOdds[market])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········(prettier/prettier)
42-47: Verify DOM elements exist before using them.The code assumes that DOM elements are always found, but this might not be the case if the HTML structure changes.
const preloadButton = document.getElementById('pre-load-odds') as HTMLButtonElement; +if (!preloadButton) { + console.error('Button with id "pre-load-odds" not found'); +} const urlParams = new URLSearchParams(window.location.search); const channelName = urlParams.get('name') || 'pub-sub-rewind'; const landingPage = document.getElementById('landing-page'); +if (!landingPage) { + console.error('Element with id "landing-page" not found'); +} const game = document.getElementById('game'); +if (!game) { + console.error('Element with id "game" not found'); +} let channel: Ably.Realtime.Channel | null = null;
184-189: Fix formatting issues according to ESLint.The static analysis hints indicate formatting issues in the code related to line breaks and indentation.
marketsToUpdate.forEach((market) => { if (market === 'nextGoal') { const team = Object.keys(newOdds.match.nextGoal)[Math.floor(Math.random() * 3)]; - newOdds.match.nextGoal[team] = (parseFloat(newOdds.match.nextGoal[team]) + (Math.random() * 0.2 - 0.1)).toFixed(2); + newOdds.match.nextGoal[team] = ( + parseFloat(newOdds.match.nextGoal[team]) + + (Math.random() * 0.2 - 0.1) + ).toFixed(2); } else { - newOdds.match.matchOdds[market] = (parseFloat(newOdds.match.matchOdds[market]) + (Math.random() * 0.2 - 0.1)).toFixed(2); + newOdds.match.matchOdds[market] = ( + parseFloat(newOdds.match.matchOdds[market]) + + (Math.random() * 0.2 - 0.1) + ).toFixed(2); } });🧰 Tools
🪛 ESLint
[error] 186-186: Replace
2with⏎··········2,⏎········(prettier/prettier)
[error] 188-188: Replace
parseFloat(newOdds.match.matchOdds[market])·+·(Math.random()·*·0.2·-·0.1)with⏎··········parseFloat(newOdds.match.matchOdds[market])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········(prettier/prettier)
📜 Review details
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⛔ Files ignored due to path filters (2)
examples/pub-sub-rewind/javascript/yarn.lockis excluded by!**/yarn.lock,!**/*.lockexamples/pub-sub-rewind/react/yarn.lockis excluded by!**/yarn.lock,!**/*.lock
📒 Files selected for processing (25)
examples/pub-sub-rewind/javascript/.env.example(1 hunks)examples/pub-sub-rewind/javascript/.gitignore(1 hunks)examples/pub-sub-rewind/javascript/README.md(1 hunks)examples/pub-sub-rewind/javascript/index.html(1 hunks)examples/pub-sub-rewind/javascript/package.json(1 hunks)examples/pub-sub-rewind/javascript/src/script.ts(1 hunks)examples/pub-sub-rewind/javascript/src/styles.css(1 hunks)examples/pub-sub-rewind/javascript/tailwind.config.js(1 hunks)examples/pub-sub-rewind/javascript/tsconfig.json(1 hunks)examples/pub-sub-rewind/javascript/vite-env.d.ts(1 hunks)examples/pub-sub-rewind/javascript/vite.config.ts(1 hunks)examples/pub-sub-rewind/page.md(1 hunks)examples/pub-sub-rewind/react/.env.example(1 hunks)examples/pub-sub-rewind/react/.eslintrc.json(1 hunks)examples/pub-sub-rewind/react/.gitignore(1 hunks)examples/pub-sub-rewind/react/README.md(1 hunks)examples/pub-sub-rewind/react/next.config.ts(1 hunks)examples/pub-sub-rewind/react/package.json(1 hunks)examples/pub-sub-rewind/react/postcss.config.mjs(1 hunks)examples/pub-sub-rewind/react/src/app/layout.tsx(1 hunks)examples/pub-sub-rewind/react/src/app/odds/page.tsx(1 hunks)examples/pub-sub-rewind/react/src/app/page.tsx(1 hunks)examples/pub-sub-rewind/react/styles/styles.css(1 hunks)examples/pub-sub-rewind/react/tailwind.config.ts(1 hunks)examples/pub-sub-rewind/react/tsconfig.json(1 hunks)
🧰 Additional context used
🪛 ESLint
examples/pub-sub-rewind/javascript/vite.config.ts
[error] 1-1: Insert ;
(prettier/prettier)
[error] 6-9: Replace ⏎········require('tailwindcss'),⏎········require('autoprefixer'),⏎······ with require('tailwindcss'),·require('autoprefixer')
(prettier/prettier)
[error] 10-10: Insert ,
(prettier/prettier)
[error] 11-11: Insert ,
(prettier/prettier)
[error] 12-12: Insert ;⏎
(prettier/prettier)
examples/pub-sub-rewind/javascript/tailwind.config.js
[error] 3-6: Replace ⏎····"./index.html",⏎····"./src/**/*.{js,jsx,ts,tsx}",⏎·· with './index.html',·'./src/**/*.{js,jsx,ts,tsx}'
(prettier/prettier)
[error] 11-12: Replace ⏎ with ;
(prettier/prettier)
examples/pub-sub-rewind/javascript/src/script.ts
[error] 88-88: Replace parseFloat(matchData.match.nextGoal[team])·+·(Math.random()·*·0.2·-·0.1) with ⏎··········parseFloat(matchData.match.nextGoal[team])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········
(prettier/prettier)
[error] 90-90: Replace parseFloat(matchData.match.matchOdds[market])·+·(Math.random()·*·0.2·-·0.1) with ⏎··········parseFloat(matchData.match.matchOdds[market])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········
(prettier/prettier)
[error] 186-186: Replace 2 with ⏎··········2,⏎········
(prettier/prettier)
[error] 188-188: Replace parseFloat(newOdds.match.matchOdds[market])·+·(Math.random()·*·0.2·-·0.1) with ⏎··········parseFloat(newOdds.match.matchOdds[market])·+⏎··········(Math.random()·*·0.2·-·0.1)⏎········
(prettier/prettier)
🪛 LanguageTool
examples/pub-sub-rewind/javascript/README.md
[uncategorized] ~25-~25: Possible missing comma found.
Context: ...mple .env.local ``` 4. In .env.local update the value of `VITE_PUBLIC_ABLY_KEY` to ...
(AI_HYDRA_LEO_MISSING_COMMA)
[style] ~25-~25: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...ue of VITE_PUBLIC_ABLY_KEY to be your Ably API key. 5. Install dependencies: ```...
(ADVERB_REPETITION_PREMIUM)
examples/pub-sub-rewind/react/README.md
[style] ~25-~25: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...ue of NEXT_PUBLIC_ABLY_KEY to be your Ably API key. 5. Install dependencies: ```...
(ADVERB_REPETITION_PREMIUM)
examples/pub-sub-rewind/page.md
[uncategorized] ~5-~5: Possible missing article found.
Context: ... start working in your application with context of what happened before they went joine...
(AI_HYDRA_LEO_MISSING_THE)
[uncategorized] ~17-~17: Loose punctuation mark.
Context: ...ocs/getting-started/react#ably-provider): initializes and manages a shared pub/su...
(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~18-~18: Loose punctuation mark.
Context: .../getting-started/react#channel-provider): manages the state and functionality of ...
(UNLIKELY_OPENING_PUNCTUATION)
[style] ~114-~114: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...T_PUBLIC_ABLY_KEY` variable to use your Ably API key. // Javascript In CodeSandbox...
(ADVERB_REPETITION_PREMIUM)
[style] ~118-~118: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...E_PUBLIC_ABLY_KEY` variable to use your Ably API key.
(ADVERB_REPETITION_PREMIUM)
🔇 Additional comments (21)
examples/pub-sub-rewind/javascript/vite-env.d.ts (2)
1-4: Well-defined environment variable interfaceThe
ImportMetaEnvinterface properly declares the Ably API key as a readonly string property, preventing accidental modifications. The helpful comment on line 3 encourages future developers to extend this interface as needed.
6-8: Correctly extends ImportMeta interfaceThis properly extends the Vite's built-in
ImportMetainterface to include the environment variables, ensuring type safety when accessingimport.meta.env.VITE_PUBLIC_ABLY_KEYthroughout the application.examples/pub-sub-rewind/react/styles/styles.css (1)
1-3: Standard Tailwind CSS setupThe file correctly includes the three essential Tailwind directives to properly incorporate base styles, component styles, and utility classes into the project.
examples/pub-sub-rewind/react/postcss.config.mjs (1)
1-9: Solid PostCSS Config SetupThe PostCSS configuration is set up correctly using an inline TypeScript hint, which increases type safety and integration with tools that support type checking. No issues were found.
examples/pub-sub-rewind/react/.eslintrc.json (1)
1-4: Clean ESLint ConfigurationThis file correctly extends Next.js's core web vitals and TypeScript rules, ensuring adherence to best practices for Next.js apps. Everything looks properly configured.
examples/pub-sub-rewind/javascript/src/styles.css (1)
1-24: Effective Use of Tailwind Directives and Custom StylesThe CSS file appropriately imports Tailwind’s base, components, and utilities, with additional custom flexbox-based rules for centering elements and styling input fields. The styling is concise and meets the demo requirements.
examples/pub-sub-rewind/javascript/README.md (3)
1-4: Well-structured introduction to the example.The introduction clearly explains the purpose of this example, introducing Ably Pub/Sub and the rewind feature.
5-38: Clear setup instructions with logical flow.The step-by-step instructions are comprehensive and easy to follow, covering all the necessary steps from cloning to running the application.
🧰 Tools
🪛 LanguageTool
[uncategorized] ~25-~25: Possible missing comma found.
Context: ...mple .env.local ``` 4. In.env.localupdate the value of `VITE_PUBLIC_ABLY_KEY` to ...(AI_HYDRA_LEO_MISSING_COMMA)
[style] ~25-~25: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...ue ofVITE_PUBLIC_ABLY_KEYto be your Ably API key. 5. Install dependencies: ```...(ADVERB_REPETITION_PREMIUM)
16-17:✅ Verification successful
Verify the directory path is correct
The path appears to start with a leading slash, which might cause confusion as it suggests starting from the root directory rather than from the cloned repository root.
-cd /examples/pub-sub-rewind/javascript/ +cd examples/pub-sub-rewind/javascript/
🏁 Script executed:
#!/bin/bash # Check if the directory structure exists as specified in the README if [ -d "examples/pub-sub-rewind/javascript/" ]; then echo "✅ Directory path exists as specified in the README (without leading slash)" exit 0 elif [ -d "/examples/pub-sub-rewind/javascript/" ]; then echo "❌ Directory path exists with leading slash - README should be updated" exit 1 else echo "❌ Directory path does not exist in either format" exit 1 fiLength of output: 216
Ensure README Uses a Relative Directory Path
The verification shows that the directory exists only when using the relative path. Please update the command on lines 16-17 from using a leading slash to the relative path:
- File:
examples/pub-sub-rewind/javascript/README.md(Lines 16-17)- Diff:
-cd /examples/pub-sub-rewind/javascript/ +cd examples/pub-sub-rewind/javascript/examples/pub-sub-rewind/javascript/.gitignore (1)
1-36: Comprehensive .gitignore with appropriate patterns.This .gitignore file is well-structured and includes all necessary patterns for a JavaScript/TypeScript project, ensuring that temporary files, build artifacts, dependencies, and sensitive information aren't committed to the repository.
examples/pub-sub-rewind/react/src/app/layout.tsx (2)
1-20: Correct implementation of Next.js layout component.The RootLayout component correctly follows Next.js app router conventions and provides a clean base structure for the application.
4-4:✅ Verification successful
Ensure the CSS file path is correct.
Verify that the relative import path to the styles file is correct. Make sure the directory structure matches your import statement.
🏁 Script executed:
#!/bin/bash # Check if the CSS file exists at the specified path if [ -f "examples/pub-sub-rewind/react/styles/styles.css" ]; then echo "✅ CSS file exists at the expected path" exit 0 else echo "❌ CSS file not found at the expected path" # Try to find where it might be located echo "Searching for styles.css in the react directory..." find examples/pub-sub-rewind/react -name "styles.css" -type f exit 1 fiLength of output: 156
CSS Import Path Verified as Correct
The verification confirmed that the CSS file exists at the expected path (
examples/pub-sub-rewind/react/styles/styles.css), which validates the relative import (../../styles/styles.css) inexamples/pub-sub-rewind/react/src/app/layout.tsx. No changes are necessary.examples/pub-sub-rewind/react/.gitignore (1)
1-40: Well-structured .gitignore file.This is a comprehensive .gitignore file following best practices for a Next.js/React project. It properly excludes:
- Dependencies and package management files with appropriate Yarn 2+ exceptions
- Build and testing artifacts
- Environment files
- System files and logs
- TypeScript generated files
The structure with clear section comments makes maintenance easier for future contributors.
examples/pub-sub-rewind/javascript/tsconfig.json (2)
2-12: TypeScript configuration looks appropriate for a browser application.The compiler options are well-configured for a modern browser application with proper type checking enabled. Setting
noImplicitAnyto true helps enforce type safety.
13-15: Properly structured include/exclude patterns.The configuration correctly includes TypeScript files from the source directory while excluding appropriate directories like node_modules, dist, and lib.
examples/pub-sub-rewind/react/tailwind.config.ts (1)
1-18: Well-typed Tailwind configuration with proper CSS variable usage.This configuration is well-structured and follows Tailwind CSS best practices:
- Uses TypeScript's
satisfies Configfor type checking- Correctly specifies content paths for all relevant file types
- Uses CSS variables for theme colors, enabling easier theme switching
Good job implementing a type-safe configuration.
examples/pub-sub-rewind/react/README.md (1)
1-40: Clear and comprehensive README with good setup instructions.The README provides a concise description of the example and clear step-by-step instructions for setting up and running the application.
🧰 Tools
🪛 LanguageTool
[style] ~25-~25: This adverb was used twice in the sentence. Consider removing one of them or replacing them with a synonym.
Context: ...ue ofNEXT_PUBLIC_ABLY_KEYto be your Ably API key. 5. Install dependencies: ```...(ADVERB_REPETITION_PREMIUM)
examples/pub-sub-rewind/react/tsconfig.json (1)
1-28: TypeScript Configuration is Well-Structured
The new configuration includes all the essential compiler options for modern React and Next.js development. The settings for strict type-checking, incremental builds, and module resolution are appropriate.examples/pub-sub-rewind/javascript/package.json (1)
1-25: Package.json for JavaScript Example is Set Up Correctly
The dependencies, devDependencies, and scripts are appropriately defined for a Vite-based project. Ensure that the version constraints (especially for critical libraries like Ably and Vite) are maintained as per project requirements.examples/pub-sub-rewind/react/package.json (1)
1-29: Next.js Package Configuration is Solid
The package.json for the React example is well configured with clear scripts and dependency versioning that support Next.js, React, and Tailwind CSS development. Ensure that the version numbers align with your project’s long-term stability plans.examples/pub-sub-rewind/react/src/app/odds/page.tsx (1)
37-37:❓ Verification inconclusive
Use consistent channel options with rewind parameter.
The
rewind: '10'parameter requests the last 10 messages from the channel history. Ensure this value is consistent with your application requirements and message volume expectations.
🌐 Web query:
What is the recommended rewind parameter value for Ably pub/sub channels?Error during web search
Action: Verify the Ably rewind parameter value for consistency
The current implementation uses
rewind: '10'to retrieve the last 10 messages from the channel history. However, we encountered an error when attempting to confirm the recommended value for Ably pub/sub channels. Please double-check the Ably documentation (or any internal guidelines you might have) to ensure that this value aligns with both your application requirements and the message volume expectations. If necessary, update all instances where the rewind parameter is configured to maintain consistency.
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This PR contains the two code samples for the new Examples section we are creating. It contains a Typescript and a React version for Pub Sub Rewind.
The README within each directory /examples/pub-sub-rewind/javascript and /examples/pub-sub-rewind/react contains information on how to get these running.
Summary by CodeRabbit
New Features
Documentation