Create DistanceFormatter.

Fixes #1197
2022-04-23 16:02:15 +02:00
parent b44bab1ab5
commit f2ac1edc4b
65 changed files with 177 additions and 311 deletions
@@ -0,0 +1,82 @@
+package de.dennisguse.opentracks.data.models;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.util.Pair;
+
+import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.util.StringUtils;
+
+public class DistanceFormatter {
+
+    private final Resources resources;
+
+    private final int decimalCount;
+
+    private DistanceFormatter(Resources resources, int decimalCount) {
+        this.resources = resources;
+        this.decimalCount = decimalCount;
+    }
+
+    public String formatDistance(Distance distance, boolean metricUnits) {
+        if (distance.isInvalid()) {
+            return resources.getString(R.string.value_unknown);
+        }
+
+        Pair<String, String> distanceParts = getDistanceParts(distance, metricUnits);
+
+        return resources.getString(R.string.distance_with_unit, distanceParts.first, distanceParts.second);
+    }
+
+    /**
+     * Get the formatted distance with unit.
+     *
+     * @param metricUnits true to use metric unit
+     * @return the formatted distance (or null) and it's unit as {@link Pair}
+     */
+    public Pair<String, String> getDistanceParts(Distance distance, boolean metricUnits) {
+        if (distance.isInvalid()) {
+            return new Pair<>(null, resources.getString(metricUnits ? R.string.unit_meter : R.string.unit_feet));
+        }
+
+        if (metricUnits) {
+            if (distance.greaterThan(Distance.of(500))) {
+                return new Pair<>(StringUtils.formatDecimal(distance.toKM(), decimalCount), resources.getString(R.string.unit_kilometer));
+            } else {
+                return new Pair<>(StringUtils.formatDecimal(distance.toM(), decimalCount), resources.getString(R.string.unit_meter));
+            }
+        } else {
+            if (distance.greaterThan(Distance.ofMile(0.5))) {
+                return new Pair<>(StringUtils.formatDecimal(distance.toMI(), decimalCount), resources.getString(R.string.unit_mile));
+            } else {
+                return new Pair<>(StringUtils.formatDecimal(distance.toFT(), decimalCount), resources.getString(R.string.unit_feet));
+            }
+        }
+    }
+
+    public static Builder Builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private int decimalCount;
+
+        public Builder() {
+            decimalCount = 2;
+        }
+
+        public Builder setDecimalCount(int decimalCount) {
+            this.decimalCount = decimalCount;
+            return this;
+        }
+
+        public DistanceFormatter build(Resources resource) {
+            return new DistanceFormatter(resource, decimalCount);
+        }
+
+        public DistanceFormatter build(Context context) {
+            return build(context.getResources());
+        }
+    }
+}