Merge pull request #252 from TouchInstinct/date_time_utils

Date time utils

utils/build.gradle

@@ -5,6 +5,8 @@ dependencies {
     implementation "androidx.core:core"
     implementation "androidx.annotation:annotation"
     implementation "com.google.android.material:material"
+    implementation "net.danlew:android.joda"
+    implementation "junit:junit"
 
     constraints {
         implementation("androidx.core:core") {
@@ -24,5 +26,17 @@ dependencies {
                 require '1.2.0-rc01'
             }
         }
+
+        implementation("net.danlew:android.joda") {
+            version {
+                require '2.10.2'
+            }
+        }
+
+        implementation("junit:junit") {
+            version {
+                require '4.13.2'
+            }
+        }
     }
 }

utils/src/main/java/ru/touchin/roboswag/core/utils/DateFormatUtils.kt

@@ -0,0 +1,32 @@
+package ru.touchin.roboswag.core.utils
+
+import org.joda.time.DateTime
+import org.joda.time.format.DateTimeFormat
+
+/**
+ * Util object for handling some cases with DateTime e.g. parsing string to DateTime object
+ */
+object DateFormatUtils {
+
+    enum class Format(val formatValue: String) {
+        DATE_TIME_FORMAT("yyyy-MM-dd'T'HH:mm:ss.SSSZZ"),
+        DATE_FORMAT("yyyy-MM-dd"),
+        TIME_FORMAT("HH:mm:ssZ")
+    }
+
+    /**
+     * @return the result of parsed string value
+     * @param value is string value of date time in right format
+     * @param format is date time format for parsing string value.
+     * Default value is [Format.DATE_TIME_FORMAT]
+     * @param defaultValue is value returned in case of exception
+     */
+    fun fromString(
+            value: String,
+            format: Format = Format.DATE_TIME_FORMAT,
+            defaultValue: DateTime? = null
+    ): DateTime? = runCatching { value.parse(format.formatValue) }.getOrDefault(defaultValue)
+
+    private fun String.parse(format: String) = DateTimeFormat.forPattern(format).parseDateTime(this)
+
+}

utils/src/test/java/DateFormatUtilsTest.kt

@@ -0,0 +1,34 @@
+import org.joda.time.DateTime
+import org.joda.time.DateTimeZone
+import org.joda.time.tz.UTCProvider
+import org.junit.Assert
+import org.junit.Test
+import ru.touchin.roboswag.core.utils.DateFormatUtils
+
+class DateFormatUtilsTest {
+
+    init {
+        DateTimeZone.setProvider(UTCProvider())
+    }
+
+    @Test
+    fun `Assert Date format parsing`() {
+        val dateTime = DateFormatUtils.fromString(
+                value = "2015-04-29",
+                format = DateFormatUtils.Format.DATE_FORMAT
+        )
+        Assert.assertEquals(DateTime(2015, 4, 29, 0, 0, 0), dateTime)
+    }
+
+    @Test
+    fun `Assert Date format parsing with default value`() {
+        val currentDateTime = DateTime.now()
+
+        val dateTime = DateFormatUtils.fromString(
+                value = "2015-04-29",
+                format = DateFormatUtils.Format.DATE_TIME_FORMAT,
+                defaultValue = currentDateTime
+        )
+        Assert.assertEquals(currentDateTime, dateTime)
+    }
+}