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SinglePageQuery.java
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SinglePageQuery.java
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package run.halo.app.content;
import static java.util.Comparator.comparing;
import static run.halo.app.extension.router.selector.SelectorUtil.labelAndFieldSelectorToPredicate;
import io.swagger.v3.oas.annotations.media.ArraySchema;
import io.swagger.v3.oas.annotations.media.Schema;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import java.util.function.Predicate;
import org.apache.commons.lang3.StringUtils;
import org.springframework.data.domain.Sort;
import org.springframework.lang.Nullable;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.server.ServerWebExchange;
import run.halo.app.core.extension.content.Post;
import run.halo.app.core.extension.content.SinglePage;
import run.halo.app.core.extension.endpoint.SortResolver;
import run.halo.app.extension.Comparators;
import run.halo.app.extension.router.IListRequest;
/**
* Query parameter for {@link SinglePage} list.
*
* @author guqing
* @since 2.0.0
*/
public class SinglePageQuery extends IListRequest.QueryListRequest {
private final ServerWebExchange exchange;
public SinglePageQuery(ServerRequest request) {
super(request.queryParams());
this.exchange = request.exchange();
}
@Nullable
@Schema(name = "contributor")
public Set<String> getContributors() {
List<String> contributorList = queryParams.get("contributor");
return contributorList == null ? null : Set.copyOf(contributorList);
}
@Nullable
public Post.PostPhase getPublishPhase() {
String publishPhase = queryParams.getFirst("publishPhase");
return Post.PostPhase.from(publishPhase);
}
@Nullable
public Post.VisibleEnum getVisible() {
String visible = queryParams.getFirst("visible");
return Post.VisibleEnum.from(visible);
}
@Nullable
@Schema(description = "SinglePages filtered by keyword.")
public String getKeyword() {
return StringUtils.defaultIfBlank(queryParams.getFirst("keyword"), null);
}
@ArraySchema(uniqueItems = true,
arraySchema = @Schema(name = "sort",
description = "Sort property and direction of the list result. Supported fields: "
+ "creationTimestamp,publishTime"),
schema = @Schema(description = "like field,asc or field,desc",
implementation = String.class,
example = "creationTimestamp,desc"))
public Sort getSort() {
return SortResolver.defaultInstance.resolve(exchange);
}
/**
* Build a comparator for {@link SinglePageQuery}.
*
* @return comparator
*/
public Comparator<SinglePage> toComparator() {
var sort = getSort();
var creationTimestampOrder = sort.getOrderFor("creationTimestamp");
List<Comparator<SinglePage>> comparators = new ArrayList<>();
if (creationTimestampOrder != null) {
Comparator<SinglePage> comparator =
comparing(page -> page.getMetadata().getCreationTimestamp());
if (creationTimestampOrder.isDescending()) {
comparator = comparator.reversed();
}
comparators.add(comparator);
}
var publishTimeOrder = sort.getOrderFor("publishTime");
if (publishTimeOrder != null) {
Comparator<Object> nullsComparator = publishTimeOrder.isAscending()
? org.springframework.util.comparator.Comparators.nullsLow()
: org.springframework.util.comparator.Comparators.nullsHigh();
Comparator<SinglePage> comparator =
comparing(page -> page.getSpec().getPublishTime(), nullsComparator);
if (publishTimeOrder.isDescending()) {
comparator = comparator.reversed();
}
comparators.add(comparator);
}
comparators.add(Comparators.compareCreationTimestamp(false));
comparators.add(Comparators.compareName(true));
return comparators.stream()
.reduce(Comparator::thenComparing)
.orElse(null);
}
/**
* Build a predicate for {@link SinglePageQuery}.
*
* @return predicate
*/
public Predicate<SinglePage> toPredicate() {
Predicate<SinglePage> paramPredicate = singlePage -> contains(getContributors(),
singlePage.getStatusOrDefault().getContributors());
String keyword = getKeyword();
if (keyword != null) {
paramPredicate = paramPredicate.and(page -> {
String excerpt = page.getStatusOrDefault().getExcerpt();
return StringUtils.containsIgnoreCase(excerpt, keyword)
|| StringUtils.containsIgnoreCase(page.getSpec().getSlug(), keyword)
|| StringUtils.containsIgnoreCase(page.getSpec().getTitle(), keyword);
});
}
Post.PostPhase publishPhase = getPublishPhase();
if (publishPhase != null) {
paramPredicate = paramPredicate.and(page -> {
if (Post.PostPhase.PENDING_APPROVAL.equals(publishPhase)) {
return !page.isPublished()
&& Post.PostPhase.PENDING_APPROVAL.name()
.equalsIgnoreCase(page.getStatusOrDefault().getPhase());
}
// published
if (Post.PostPhase.PUBLISHED.equals(publishPhase)) {
return page.isPublished();
}
// draft
return !page.isPublished();
});
}
Post.VisibleEnum visible = getVisible();
if (visible != null) {
paramPredicate =
paramPredicate.and(post -> visible.equals(post.getSpec().getVisible()));
}
Predicate<SinglePage> predicate = labelAndFieldSelectorToPredicate(getLabelSelector(),
getFieldSelector());
return predicate.and(paramPredicate);
}
boolean contains(Collection<String> left, List<String> right) {
// parameter is null, it means that ignore this condition
if (left == null) {
return true;
}
// else, it means that right is empty
if (left.isEmpty()) {
return right.isEmpty();
}
if (right == null) {
return false;
}
return right.stream().anyMatch(left::contains);
}
}