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Daniele
2021-09-22 21:41:21 +02:00
parent 718c654056
commit 9aa2652059
9 changed files with 146 additions and 2 deletions
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app/src/main/java/it/danieleverducci/nextcloudmaps/model/Geofavorite.java
+24
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@@ -38,6 +38,7 @@ import java.util.Comparator;
public class Geofavorite implements Serializable {
public static final String DEFAULT_CATEGORY = "Personal";
private static final double EARTH_RADIUS = 6371; // https://en.wikipedia.org/wiki/Earth_radius
/**
* JSON Definition:
@@ -148,12 +149,18 @@ public class Geofavorite implements Serializable {
this.comment = comment;
}
/**
* Comparators for list order
*/
public static Comparator<Geofavorite> ByTitleAZ = (gf0, gf1) -> gf0.name.compareTo(gf1.name);
public static Comparator<Geofavorite> ByLastCreated = (gf0, gf1) -> (int) (gf1.dateCreated - gf0.dateCreated);
public static Comparator<Geofavorite> ByCategory = (gf0, gf1) -> gf0.category.compareTo(gf1.category);
public static Comparator<Geofavorite> ByDistance = (gf0, gf1) -> 0; // (int) ((gf1.getDistanceFrom(userPosition) - gf0.getDistanceFrom(userPosition)) * 1000);
public String getCoordinatesString() {
return this.lat + " N, " + this.lng + " E";
}
public Uri getGeoUri() {
return Uri.parse("geo:" + this.lat + "," + this.lng + "(" + this.name + ")");
}
@@ -162,6 +169,22 @@ public class Geofavorite implements Serializable {
return getLat() != 0 && getLng() != 0 && getName() != null && getName().length() > 0;
}
/**
* Returns the distance between the current Geofavorite and the provided one, in kilometers.
* @param other Geovavorite
* @return the distance in kilometers
*/
public double getDistanceFrom(Geofavorite other) {
double latDistance = (other.lat-lat) * Math.PI / 180;
double lonDistance = (other.lng-lng) * Math.PI / 180;
double a =
Math.sin(latDistance / 2) * Math.sin(latDistance / 2) +
Math.cos(lat * Math.PI / 180) * Math.cos(other.lat * Math.PI / 180) *
Math.sin(lonDistance / 2) * Math.sin(lonDistance / 2);
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
return EARTH_RADIUS * c;
}
/**
* Based on Nextcloud Maps's getLetterColor util.
* Assigns a color to a category based on its two first letters.
@@ -196,4 +219,5 @@ public class Geofavorite implements Serializable {
public String toString() {
return "[" + getName() + " (" + getLat() + "," + getLng() + ")]";
}
}