66 lines
2.1 KiB
Go
66 lines
2.1 KiB
Go
/*
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Copyright (c) 2015, Hendrik van Wyk
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of invertergui nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package webgui
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import (
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"time"
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)
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type ChargeTracker struct {
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fullLevel float64
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currentLevel float64
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lastUpdate time.Time
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}
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// Creates a new charge tracker. fullLevel is in A h.
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func NewChargeTracker(fullLevel float64) *ChargeTracker {
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return &ChargeTracker{
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fullLevel: fullLevel,
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currentLevel: fullLevel, // Have to start somewhere.
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lastUpdate: time.Now(),
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}
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}
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func (c *ChargeTracker) Update(amp float64) {
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newNow := time.Now()
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elapsed := newNow.Sub(c.lastUpdate).Hours()
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c.lastUpdate = newNow
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c.currentLevel -= elapsed * amp
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}
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func (c *ChargeTracker) CurrentLevel() float64 {
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return c.currentLevel
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}
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func (c *ChargeTracker) Reset() {
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c.currentLevel = c.fullLevel
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}
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