Refactoring notes and hooking up the preference synth #32
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WalkthroughThis pull request introduces a comprehensive update to the application's synthesizer management system. The changes focus on enhancing the flexibility of instrument selection by implementing a dynamic synthesizer configuration based on user preferences. A new Changes
Sequence DiagramsequenceDiagram
participant User
participant NotesPage
participant PreferencesContext
participant PianoSamplerSingleton
participant Tone
User->>PreferencesContext: Set synthType
NotesPage->>PreferencesContext: Retrieve synthType
alt synthType is "piano"
NotesPage->>PianoSamplerSingleton: getInstance()
PianoSamplerSingleton->>Tone: Create Sampler
else synthType is "poly"
NotesPage->>Tone: Create PolySynth
end
NotesPage->>NotesPage: Update instrument state
NotesPage->>User: Render notes interface
Possibly related PRs
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Actionable comments posted: 0
🧹 Nitpick comments (3)
utils/PianoSamplerSingleton.ts (2)
3-58: Consider avoiding a static-only class.This file defines a class that contains only static members. A static-only class can sometimes be replaced by simpler exports of functions or objects, which may be clearer. If it’s essential to have class semantics (like enforcing the Singleton pattern), that’s fine, but bear in mind that this approach might appear more complex than necessary.
Here’s an example refactor that avoids a class while still preserving the Singleton behavior:
-import * as Tone from "tone"; -export class PianoSamplerSingleton { - private static instance: Tone.Sampler | null = null; - private static isLoading = false; - private static loadPromise: Promise<void> | null = null; - - static async getInstance(): Promise<Tone.Sampler> { - if (!this.instance && !this.loadPromise) { - this.isLoading = true; - this.loadPromise = new Promise((resolve) => { - const sampler = new Tone.Sampler({ - // ... - }).toDestination(); - }); - } - await this.loadPromise; - return this.instance!; - } -} +import * as Tone from "tone"; +let instance: Tone.Sampler | null = null; +let isLoading = false; +let loadPromise: Promise<void> | null = null; +export async function getPianoSampler(): Promise<Tone.Sampler> { + if (!instance && !loadPromise) { + isLoading = true; + loadPromise = new Promise((resolve) => { + const sampler = new Tone.Sampler({ + // ... + }).toDestination(); + }); + } + await loadPromise; + return instance!; +}🧰 Tools
🪛 Biome (1.9.4)
[error] 3-58: Avoid classes that contain only static members.
Prefer using simple functions instead of classes with only static members.
(lint/complexity/noStaticOnlyClass)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 10-10: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 11-11: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 48-48: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 49-49: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 55-55: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 56-56: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
9-11: Usingthisin static methods may be confusing for some readers.The code uses
this.instance,this.isLoading, etc. in static context, which can be slightly misleading sincethistypically references an instance. For clarity, you could replacethiswith the class name, e.g.PianoSamplerSingleton.instance, to make it obvious that these refer to static properties.Here’s a minimal diff suggestion:
-static async getInstance(): Promise<Tone.Sampler> { - if (!this.instance && !this.loadPromise) { - this.isLoading = true; +static async getInstance(): Promise<Tone.Sampler> { + if (!PianoSamplerSingleton.instance && !PianoSamplerSingleton.loadPromise) { + PianoSamplerSingleton.isLoading = true; ... - this.instance = sampler; - this.isLoading = false; + PianoSamplerSingleton.instance = sampler; + PianoSamplerSingleton.isLoading = false; ... - await this.loadPromise; - return this.instance!; + await PianoSamplerSingleton.loadPromise; + return PianoSamplerSingleton.instance!;Also applies to: 48-49, 55-56
🧰 Tools
🪛 Biome (1.9.4)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 10-10: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
[error] 11-11: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.(lint/complexity/noThisInStatic)
app/notes/page.tsx (1)
93-121: Loading spinner logic is user-friendly.Providing real-time feedback while the instrument loads is great. Users get a clear indication that data is being fetched or processed. Additionally, reusing a consistent spinner style throughout the app would offer a cohesive look and feel.
📜 Review details
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📒 Files selected for processing (4)
app/notes/page.tsx(1 hunks)components/Grid.tsx(2 hunks)contexts/PreferencesContext.tsx(1 hunks)utils/PianoSamplerSingleton.ts(1 hunks)
🧰 Additional context used
🪛 Biome (1.9.4)
utils/PianoSamplerSingleton.ts
[error] 3-58: Avoid classes that contain only static members.
Prefer using simple functions instead of classes with only static members.
(lint/complexity/noStaticOnlyClass)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 9-9: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 10-10: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 11-11: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 48-48: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 49-49: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 55-55: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
[error] 56-56: Using this in a static context can be confusing.
this refers to the class.
Unsafe fix: Use the class name instead.
(lint/complexity/noThisInStatic)
🔇 Additional comments (5)
contexts/PreferencesContext.tsx (1)
13-13: Default synth type changed to "piano".This addition changes the default synthesizer to "piano", which could be fine if you want everyone to start with the piano instrument. Ensure that existing users who already have local preferences stored still correctly load whatever was in their previous settings.
To confirm, you can run this shell script to search for all references to “defaultPreferences” or “gridbeat-preferences” and check if there are any assumptions about "poly" as the default:
✅ Verification successful
Let me search for any references to "poly" or synth type related code to ensure we have a complete picture.
Existing user preferences are safely preserved when loading from localStorage
The code correctly handles the transition from any previous synth type to the new default "piano". Here's why:
- The
PreferencesContext.tsxuses a spread operator to merge stored preferences with defaults:{ ...defaultPreferences, ...parsedPreferences, }This means that any existing user's stored synth type in localStorage will override the new default.
- The application properly supports both "poly" and "piano" synth types as evidenced by:
- The type definition in
types/index.ts:export type SynthType = "piano" | "poly";- The implementation in
Grid.tsxandnotes/page.tsxthat handles both types correctly- The menu UI in
Menu.tsxthat allows switching between both options🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash rg -A 3 'defaultPreferences|gridbeat-preferences'Length of output: 1854
Script:
#!/bin/bash # Search for any references to "poly" or synth type related code rg -i "synthtype|poly.*synth" -A 3Length of output: 4076
components/Grid.tsx (2)
8-8: Kudos for extracting the sampler logic into a dedicated file!Importing
PianoSamplerSingletonfrom a shared location centralizes the logic and fosters reusability. It also ensures that all components rely on the same instance of the sampler. This promotes consistency across the application.
139-165: The new loading spinner enhances user experience.Displaying a loading indicator while waiting for instrument initialization is a nice UI improvement. It provides immediate feedback and a more polished feel.
app/notes/page.tsx (2)
7-8: Nicely done importing hooks and Singleton.The addition of the
usePreferenceshook andPianoSamplerSingletonintegrates well with your app’s context + Tone.js usage. This fosters dynamic instrument selection based on user-set preferences.
17-81: Ensure consistent disposal of instruments.When you dispose of
newInstrumentifsynthType !== "piano", you’re preventing memory leaks for PolySynth instruments. This is good. However, if the user quickly switches from “piano” to “poly” and back again, consider verifying that the sampler instance remains correct and that it’s not re-initialized unnecessarily.Here is a script to search usage and see if there are calls in quick succession:
✅ Verification successful
Let me gather more information about the PianoSamplerSingleton implementation to understand how it handles instances.
The piano sampler singleton implementation is correct and safe
After reviewing the implementation, I can confirm that the current approach is safe and efficient:
- The
PianoSamplerSingletonproperly manages a single instance with static fields and proper loading states- Quick switches between synth types are handled correctly because:
- The piano sampler is never disposed (it's reused)
- The singleton ensures only one instance exists
- The loading state is properly tracked with
isLoadingandloadPromise- Multiple concurrent requests for the instance are handled safely through the Promise
The current implementation in
app/notes/page.tsxcorrectly disposes only non-piano instruments while letting the piano sampler persist, which is the desired behavior for optimal performance and resource management.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Searching for usage of setPreferences or changes to synthesizer in the code. rg -A 5 'setPreferences|synthType'Length of output: 4146
Script:
#!/bin/bash # Search for PianoSamplerSingleton implementation ast-grep --pattern 'class PianoSamplerSingleton { $$$ }' # Also search for any direct references to this class rg "PianoSamplerSingleton" -A 5Length of output: 5614
Summary by CodeRabbit
Release Notes
New Features
Improvements
Performance