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+/**
+ * Copyright 2010 RedHog, Egil Möller <egil.moller@piratpartiet.se>
+ * Copyright 2010 Pita, Peter Martischka <petermartischka@googlemail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import("sqlbase.sqlbase");
+import("sqlbase.sqlcommon");
+import("sqlbase.sqlobj");
+import("etherpad.log");
+
+function tagsToQuery(tags, antiTags) {
+ var prefixed = [];
+ for (i = 0; i < antiTags.length; i++)
+ prefixed[i] = '!' + antiTags[i];
+ return tags.concat(prefixed).join(',');
+}
+
+function queryToTags(query) {
+ var tags = {
+ tags: new Array(),
+ antiTags: new Array()
+ };
+
+ if (query != undefined && query != '') {
+ var query = query.split(',');
+ for (i = 0; i < query.length; i++)
+ if (query[i][0] == '!')
+ tags.antiTags.push(query[i].substring(1));
+ else
+ tags.tags.push(query[i]);
+ }
+ return tags;
+}
+
+function stringFormat(text, obj) {
+ var name;
+ for (name in obj) {
+ //iterate through the params and replace their placeholders from the original text
+ text = text.replace(new RegExp('%\\(' + name + '\\)s', 'gi' ), obj[name]);
+ }
+ return text;
+}
+
+/* All these sql query functions both takes a querySql object as
+ * parameter and returns one. This object has two members - sql and
+ * params. Sql is a string of an sql table name or a subqyery in
+ * parens. The table pr subquery should have an ID column containing a
+ * PAD_ID.
+ */
+
+/* Filters pads by tags and anti-tags */
+function getQueryToSql(tags, antiTags, querySql) {
+ var queryTable;
+ var queryParams;
+
+ if (querySql == null) {
+ queryTable = 'PAD_META';
+ queryParams = [];
+ } else {
+ queryTable = querySql.sql;
+ queryParams = querySql.params;
+ }
+
+ var exceptArray = [];
+ var joinArray = [];
+ var whereArray = [];
+ var exceptParamArray = [];
+ var joinParamArray = [];
+
+ var info = new Object();
+ info.queryTable = queryTable;
+ info.n = 0;
+ var i;
+
+ for (i = 0; i < antiTags.length; i++) {
+ tag = antiTags[i];
+ exceptArray.push(
+ stringFormat(
+ 'left join (PAD_TAG as pt%(n)s ' +
+ ' join TAG AS t%(n)s on ' +
+ ' t%(n)s.NAME = ? ' +
+ ' and t%(n)s.ID = pt%(n)s.TAG_ID) on ' +
+ ' pt%(n)s.PAD_ID = p.ID ',
+ info));
+ whereArray.push(stringFormat('pt%(n)s.TAG_ID is null', info));
+ exceptParamArray.push(tag);
+ info.n += 1;
+ }
+ for (i = 0; i < tags.length; i++) {
+ tag = tags[i];
+ joinArray.push(
+ stringFormat(
+ 'join PAD_TAG as pt%(n)s on ' +
+ ' pt%(n)s.PAD_ID = p.ID ' +
+ 'join TAG as t%(n)s on ' +
+ ' t%(n)s.ID = pt%(n)s.TAG_ID ' +
+ ' and t%(n)s.NAME = ? ',
+ info));
+ joinParamArray.push(tag);
+ info.n += 1;
+ }
+
+ info["joins"] = joinArray.join(' ');
+ info["excepts"] = exceptArray.join(' ');
+ info["wheres"] = whereArray.length > 0 ? ' where ' + whereArray.join(' and ') : '';
+
+ /* Create a subselect from all the joins */
+ return {
+ sql: stringFormat(
+ '(select distinct ' +
+ ' p.ID ' +
+ ' from ' +
+ ' %(queryTable)s as p ' +
+ ' %(joins)s ' +
+ ' %(excepts)s ' +
+ ' %(wheres)s ' +
+ ') ',
+ info),
+ params: queryParams.concat(joinParamArray).concat(exceptParamArray)};
+}
+
+/* Returns the sql to count the number of results from some other
+ * query. */
+function nrSql(querySql) {
+ var queryTable;
+ var queryParams;
+
+ if (querySql == null) {
+ queryTable = 'PAD_META';
+ queryParams = [];
+ } else {
+ queryTable = querySql.sql;
+ queryParams = querySql.params;
+ }
+
+ var info = [];
+ info['query_sql'] = queryTable
+ return {
+ sql: stringFormat('(select count(*) as total from %(query_sql)s as q)', info),
+ params: queryParams};
+}
+
+/* Returns the sql to select the 10 best new tags to tack on to a
+ * query, that is, the tags that are closest to halving the result-set
+ * if tacked on. */
+function newTagsSql(querySql) {
+ var queryTable;
+ var queryParams;
+
+ if (querySql == null) {
+ queryTable = 'PAD_META';
+ queryParams = [];
+ } else {
+ queryTable = querySql.sql;
+ queryParams = querySql.params;
+ }
+
+ var info = [];
+ info["query_post_table"] = queryTable;
+ var queryNrSql = nrSql(querySql);
+ info["query_nr_sql"] = queryNrSql.sql;
+ queryNrParams = queryNrSql.params;
+
+ return {
+ sql: stringFormat('' +
+ 'select ' +
+ ' t.NAME tagname, ' +
+ ' count(tp.PAD_ID) as matches, ' +
+ ' tn.total - count(tp.PAD_ID) as antimatches, ' +
+ ' abs(count(tp.PAD_ID) - (tn.total / 2)) as weight ' +
+ 'from ' +
+ ' TAG as t, ' +
+ ' PAD_TAG as tp, ' +
+ ' %(query_nr_sql)s as tn ' +
+ 'where ' +
+ ' tp.TAG_ID = t.ID ' +
+ ' and tp.PAD_ID in %(query_post_table)s ' +
+ ' and tp.PAD_ID NOT LIKE \'%$%\'' +
+ 'group by t.NAME, tn.total ' +
+ 'having ' +
+ ' count(tp.PAD_ID) > 0 and count(tp.PAD_ID) < tn.total ' +
+ 'order by ' +
+ ' abs(count(tp.PAD_ID) - (tn.total / 2)) asc ' +
+ 'limit 10 ' +
+ '', info),
+ params: queryNrParams.concat(queryParams)};
+}
+
+/* Select the X last changed matching pads and some extra information
+ * on them. Except the Pro Pads*/
+function padInfoSql(querySql, limit, offset) {
+ var sql = '' +
+ 'select ' +
+ ' m.id as ID, ' +
+ ' DATE_FORMAT(m.lastWriteTime, \'%a, %d %b %Y %H:%i:%s GMT\') as lastWriteTime, ' +
+ ' c.TAGS ' +
+ 'from ' +
+ querySql.sql + ' as q ' +
+ ' join PAD_SQLMETA as m on ' +
+ ' m.id = q.ID ' +
+ ' join PAD_TAG_CACHE as c on ' +
+ ' c.PAD_ID = q.ID ' +
+ 'where ' +
+ ' m.id NOT LIKE \'%$%\'' +
+ 'order by ' +
+ ' m.lastWriteTime desc ';
+ if (limit != undefined)
+ sql += 'limit ' + limit + " ";
+ if (offset != undefined)
+ sql += 'offset ' + offset + " ";
+ return {
+ sql: sql,
+ params: querySql.params
+ };
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-21 16:15:42 +0000