Node / mirrors / respira / files / src / utils / timeCalculation.ts

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/**

* Convert stitch count to minutes using Brother PP1 timing formula

* Formula: ((pointCount - 1) * 150 + 3000) / 60000

* - 150ms per stitch

* - 3000ms startup time

* - Result in minutes (rounded up)

*/

export function convertStitchesToMinutes(stitchCount: number): number {

if (stitchCount <= 1) return 0;

const timeMs = (stitchCount - 1) * 150 + 3000;

const timeMin = Math.ceil(timeMs / 60000);

return timeMin < 1 ? 1 : timeMin;

}

/**

* Calculate total and elapsed time for a pattern based on color blocks

* This matches the Brother app's calculation method

*/

export function calculatePatternTime(

colorBlocks: Array<{ stitchCount: number }>,

currentStitch: number

): {

totalMinutes: number;

elapsedMinutes: number;

remainingMinutes: number;

} {

let totalMinutes = 0;

let elapsedMinutes = 0;

let cumulativeStitches = 0;

// Calculate time per color block

for (const block of colorBlocks) {

totalMinutes += convertStitchesToMinutes(block.stitchCount);

cumulativeStitches += block.stitchCount;

if (cumulativeStitches < currentStitch) {

// This entire block is completed

elapsedMinutes += convertStitchesToMinutes(block.stitchCount);

} else if (cumulativeStitches === currentStitch) {

// We just completed this block

elapsedMinutes += convertStitchesToMinutes(block.stitchCount);

break;

} else {

// We're partway through this block

const stitchesInBlock = currentStitch - (cumulativeStitches - block.stitchCount);

elapsedMinutes += convertStitchesToMinutes(stitchesInBlock);

break;

}

}

return {

totalMinutes,

elapsedMinutes,

remainingMinutes: Math.max(0, totalMinutes - elapsedMinutes),

};

}

/**

* Format minutes as MM:SS

*/

export function formatMinutes(minutes: number): string {

const mins = Math.floor(minutes);

const secs = Math.round((minutes - mins) * 60);

return \\`${mins}:${String(secs).padStart(2, '0')}\\`;

}