info.unterrainer.commons.httpserver.HandlerUtils Maven / Gradle / Ivy
package info.unterrainer.commons.httpserver;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.Set;
import info.unterrainer.commons.httpserver.daos.CoreDao;
import info.unterrainer.commons.httpserver.daos.DaoTransaction;
import info.unterrainer.commons.httpserver.enums.Attribute;
import info.unterrainer.commons.httpserver.enums.QueryField;
import info.unterrainer.commons.httpserver.exceptions.BadRequestException;
import info.unterrainer.commons.httpserver.exceptions.NotFoundException;
import info.unterrainer.commons.httpserver.jsons.ListJson;
import info.unterrainer.commons.rdbutils.entities.BasicJpa;
import io.javalin.http.Context;
public class HandlerUtils {
public Long checkAndGetId(final Context ctx) {
String s = ctx.pathParam(QueryField.ID);
return convertToLong(s);
}
public P getJpaById(final Context ctx, final E manager, final CoreDao dao) {
Long id = checkAndGetId(ctx);
P jpa = dao.getById(manager, id, getReadTenantIdsFrom(ctx));
if (jpa == null)
throw new NotFoundException();
return jpa;
}
public Set getReadTenantIdsFrom(final Context ctx) {
return ctx.attribute(Attribute.USER_TENANTS_READ_SET);
}
public Set getWriteTenantIdsFrom(final Context ctx) {
return ctx.attribute(Attribute.USER_TENANTS_WRITE_SET);
}
public P getJpaById(final Context ctx, final CoreDao dao) {
Long id = checkAndGetId(ctx);
DaoTransaction transaction = dao.getTransactionManager().beginTransaction(ctx);
try {
P jpa = dao.getById(transaction.getManager(), id, getReadTenantIdsFrom(ctx));
if (jpa == null)
throw new NotFoundException();
return jpa;
} finally {
transaction.end();
}
}
public void setPaginationParamsFor(final ListJson jList, final long offset, final long pageSize,
final long count, final String additionalQueryParamsString, final Context ctx) {
String addition = "&" + sanitizeAdditionalParamsString(additionalQueryParamsString);
jList.setFirst(String.format(QueryField.LIST_LINK, ctx.url(), 0, pageSize, addition));
if (pageSize > 0) {
int last = (int) (count / pageSize * pageSize);
if (last == count)
last -= pageSize;
jList.setLast(String.format(QueryField.LIST_LINK, ctx.url(), last, pageSize, addition));
}
long next = offset + pageSize;
if (next < count)
jList.setNext(String.format(QueryField.LIST_LINK, ctx.url(), next, pageSize, addition));
long prev = offset - pageSize;
if (prev < 0)
prev = 0;
jList.setPrevious(String.format(QueryField.LIST_LINK, ctx.url(), prev, pageSize, addition));
jList.setCount(count);
}
private String sanitizeAdditionalParamsString(final String additionalQueryParamString) {
String addition = additionalQueryParamString;
while (addition.startsWith("?"))
addition = addition.substring(1);
while (addition.startsWith("&"))
addition = addition.substring(1);
return addition;
}
public Long getQueryParamAsLong(final Context ctx, final String name) {
return getQueryParamAsLong(ctx, name, true, null);
}
public Long getQueryParamAsLong(final Context ctx, final String name, final Long defaultValue) {
return getQueryParamAsLong(ctx, name, false, defaultValue);
}
private Long getQueryParamAsLong(final Context ctx, final String name, final boolean mandatory,
final Long defaultValue) {
String o = ctx.queryParam(name);
Long result = defaultValue;
if (o != null)
result = convertToLong(o);
else if (mandatory)
throw new BadRequestException(String.format("Parameter %s is mandatory", name));
return result;
}
public Double getQueryParamAsDouble(final Context ctx, final String name) {
return getQueryParamAsDouble(ctx, name, true, null);
}
public Double getQueryParamAsDouble(final Context ctx, final String name, final Double defaultValue) {
return getQueryParamAsDouble(ctx, name, false, defaultValue);
}
private Double getQueryParamAsDouble(final Context ctx, final String name, final boolean mandatory,
final Double defaultValue) {
String o = ctx.queryParam(name);
Double result = defaultValue;
if (o != null)
result = convertToDouble(o);
else if (mandatory)
throw new BadRequestException(String.format("Parameter %s is mandatory", name));
return result;
}
public long convertToLong(final String s) {
try {
return Long.parseLong(s);
} catch (NumberFormatException e) {
throw new BadRequestException("Parameter has to be of a numeric type.");
}
}
public float convertToFloat(final String s) {
try {
return Float.parseFloat(s);
} catch (NumberFormatException e) {
throw new BadRequestException("Parameter has to be of a numeric type.");
}
}
public double convertToDouble(final String s) {
try {
return Double.parseDouble(s);
} catch (NumberFormatException e) {
throw new BadRequestException("Parameter has to be of a numeric type.");
}
}
public int convertToInt(final String s) {
try {
return Integer.parseInt(s);
} catch (NumberFormatException e) {
throw new BadRequestException("Parameter has to be of a numeric type.");
}
}
public String getQueryParamAsString(final Context ctx, final String name) {
return getQueryParamAsString(ctx, name, true, null);
}
public String getQueryParamAsString(final Context ctx, final String name, final String defaultValue) {
return getQueryParamAsString(ctx, name, false, defaultValue);
}
private String getQueryParamAsString(final Context ctx, final String name, final boolean mandatory,
final String defaultValue) {
String o = ctx.queryParam(name);
String result = defaultValue;
if (o != null)
result = o;
else if (mandatory)
throw new BadRequestException(String.format("Parameter %s is mandatory", name));
return result;
}
public LocalDateTime getQueryParamAsDateTime(final Context ctx, final String name) {
return getQueryParamAsDateTime(ctx, name, true, null);
}
public LocalDateTime getQueryParamAsDateTime(final Context ctx, final String name,
final LocalDateTime defaultValue) {
return getQueryParamAsDateTime(ctx, name, false, defaultValue);
}
private LocalDateTime getQueryParamAsDateTime(final Context ctx, final String name, final boolean mandatory,
final LocalDateTime defaultValue) {
String o = ctx.queryParam(name);
LocalDateTime result = defaultValue;
if (o != null)
result = convertToLocalDateTime(o);
else if (mandatory)
throw new BadRequestException(String.format("Parameter %s is mandatory", name));
return result;
}
public LocalDateTime convertToLocalDateTime(String o) {
try {
if (o.endsWith("Z") || o.endsWith("z"))
o = o.substring(0, o.length() - 1);
return LocalDateTime.parse(o, DateTimeFormatter.ISO_LOCAL_DATE_TIME);
} catch (DateTimeParseException e) {
throw new BadRequestException(String.format("Parameter has to be a dateTime of format '%s'",
DateTimeFormatter.ISO_LOCAL_DATE_TIME.toString()));
}
}
public Boolean getQueryParamAsBoolean(final Context ctx, final String name) {
return getQueryParamAsBoolean(ctx, name, true, null);
}
public Boolean getQueryParamAsBoolean(final Context ctx, final String name, final Boolean defaultValue) {
return getQueryParamAsBoolean(ctx, name, false, defaultValue);
}
private Boolean getQueryParamAsBoolean(final Context ctx, final String name, final boolean mandatory,
final Boolean defaultValue) {
String o = ctx.queryParam(name);
Boolean result = defaultValue;
if (o != null)
return convertToBoolean(o);
else if (mandatory)
throw new BadRequestException(String.format("Parameter %s is mandatory", name));
return result;
}
public boolean convertToBoolean(final String o) {
if (o == null)
return false;
String v = o.strip().toLowerCase();
return !v.equals("false") && !v.equals("no") && !v.equals("0");
}
}