mirror of
https://github.com/renbaoshuo/S2OJ.git
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56 lines
1.4 KiB
PHP
56 lines
1.4 KiB
PHP
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<?php
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trait UOJArticleTrait {
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static string $table_for_content;
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static string $key_for_content;
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static array $fields_for_content;
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static string $table_for_tags;
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static string $key_for_tags;
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public ?array $tags = null;
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public ?array $content = null;
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public function queryContent() {
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if ($this->content === null) {
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$this->content = DB::selectFirst([
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"select", DB::fields(static::$fields_for_content), "from", static::$table_for_content,
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"where", [static::$key_for_content => $this->info['id']]
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]);
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}
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return $this->content;
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}
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public function queryTags() {
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if ($this->tags === null) {
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$res = DB::selectAll([
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"select tag from", static::$table_for_tags,
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"where", [static::$key_for_tags => $this->info['id']],
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"order by id"
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]);
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$this->tags = [];
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foreach ($res as $row) {
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$this->tags[] = $row['tag'];
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}
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}
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return $this->tags;
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}
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public function updateTags(array $tags) {
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if ($tags !== $this->queryTags()) {
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DB::delete([
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"delete from", static::$table_for_tags,
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"where", [static::$key_for_tags => $this->info['id']],
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]);
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if ($tags) {
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$tuples = [];
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foreach ($tags as $tag) {
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$tuples[] = [$this->info['id'], $tag];
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}
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DB::insert([
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"insert into", static::$table_for_tags,
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DB::bracketed_fields([static::$key_for_tags, 'tag']),
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"values", DB::tuples($tuples)
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]);
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}
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}
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}
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}
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