Added Config builder

src/main/kotlin/net/thauvin/erik/readingtime/Config.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2020-2024, Erik C. Thauvin (erik@thauvin.net)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *  Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ *  Neither the name of this project nor the names of its contributors may be
+ *   used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package net.thauvin.erik.readingtime
+
+import java.math.RoundingMode
+
+/**
+ * Provides a configuration builder.
+ */
+class Config private constructor(
+    val text: String,
+    val wpm: Int,
+    val postfix: String,
+    val plural: String,
+    val excludeImages: Boolean,
+    val extra: Int,
+    val roundingMode: RoundingMode
+) {
+    /**
+     * Configures the parameters.
+     */
+    data class Builder(
+        private var text: String = "",
+        private var wpm: Int = 275,
+        private var postfix: String = "min read",
+        private var plural: String = "min read",
+        private var excludeImages: Boolean = false,
+        private var extra: Int = 0,
+        private var roundingMode: RoundingMode = RoundingMode.HALF_EVEN
+    ) {
+        fun text(text: String) = apply { this.text = text }
+        fun wpm(wpm: Int) = apply { this.wpm = wpm }
+        fun postfix(postfix: String) = apply { this.postfix = postfix }
+        fun plural(plural: String) = apply { this.plural = plural }
+        fun excludeImages(excludeImages: Boolean) = apply { this.excludeImages = excludeImages }
+        fun extra(extra: Int) = apply { this.extra = extra }
+        fun roundingMode(roundingMode: RoundingMode) = apply { this.roundingMode = roundingMode }
+
+        fun build() = Config(text, wpm, postfix, plural, excludeImages, extra, roundingMode)
+    }
+}

src/main/kotlin/net/thauvin/erik/readingtime/ReadingTime.kt

@@ -50,14 +50,24 @@ import java.math.RoundingMode
  * @param roundingMode The [RoundingMode] to apply. Default is [RoundingMode.HALF_DOWN].
  */
 class ReadingTime @JvmOverloads constructor(
-        text: String,
-        wpm: Int = 275,
-        var postfix: String = "min read",
-        var plural: String = "min read",
-        excludeImages: Boolean = false,
-        extra: Int = 0,
-        var roundingMode: RoundingMode = RoundingMode.HALF_EVEN
+    text: String,
+    wpm: Int = 275,
+    var postfix: String = "min read",
+    var plural: String = "min read",
+    excludeImages: Boolean = false,
+    extra: Int = 0,
+    var roundingMode: RoundingMode = RoundingMode.HALF_EVEN
 ) {
+    constructor(config: Config) : this(
+        config.text,
+        config.wpm,
+        config.postfix,
+        config.plural,
+        config.excludeImages,
+        config.extra,
+        config.roundingMode
+    )
+
     companion object {
         private const val INVALID: Double = -1.0
 

src/test/kotlin/net/thauvin/erik/readingtime/ReadingTimeTest.kt

@@ -186,6 +186,49 @@ class ReadingTimeTest {
         assertEquals("2", rt.calcReadingTime(), "calcReadingTime(275 * 2)")
     }
 
+    @Test
+    fun testReadingTimeConfig() {
+        var config = Config.Builder().text(blogPost)
+
+        assertEquals("2 min read", ReadingTime(config.build()).calcReadingTime(),
+            "calcReadingTime(blogPost)")
+
+        config = config.plural("mins read")
+        assertEquals("2 mins read", ReadingTime(config.build()).calcReadingTime(),
+            "calcReadingTime(plural)")
+
+        config = config.text(mediumPost).plural("")
+        assertEquals("2", ReadingTime(config.build()).calcReadingTime(), "calcReadingTime(mediumPost)")
+
+        config = config.text("This is a test.").postfix("")
+        assertEquals("0", ReadingTime(config.build()).calcReadingTime(), "calcReadingTime(test)")
+
+        config = config.text("")
+        assertEquals("0", ReadingTime(config.build()).calcReadingTime(), "calcReadingTime(empty)")
+
+        config = config.text(twoSeventyFive)
+        assertEquals("1", ReadingTime(config.build()).calcReadingTime(), "calcReadingTime(275)")
+
+        config = config.text("$twoSeventyFive $twoSeventyFive")
+        assertEquals("2", ReadingTime(config.build()).calcReadingTime(), "calcReadingTime(275 * 2)")
+
+        config = config.extra(60)
+        assertEquals("3", ReadingTime(config.build()).calcReadingTime(), "extra(60)")
+
+        config = config.text(blogPost).roundingMode(RoundingMode.UP)
+        assertEquals("4", ReadingTime(config.build()).calcReadingTime(), "RoundingMode.UP")
+
+        config = config.text(mediumPost).wpm(300).extra(0)
+        assertEquals(
+            calcReadingTime(mediumPost, 300) + calcImgTime(3),
+            ReadingTime(config.build()).calcReadingTimeInSec(),
+            "calcReadingTimeInSec(mediumPost 300 wpm)"
+        )
+
+        config = config.excludeImages(true)
+        assertEquals("1", ReadingTime(config.build()).calcReadingTime(), "excludeImages")
+    }
+
     @Test
     fun testRoundingMode() {
         rt.text = blogPost