❤️ 完整开源界面和内核 https://github.com/siyuan-note/siyuan/issues/5013

kernel/sql/span.go

@@ -0,0 +1,126 @@
+// SiYuan - Build Your Eternal Digital Garden
+// Copyright (c) 2020-present, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package sql
+
+import (
+	"database/sql"
+	"strconv"
+	"strings"
+
+	"github.com/88250/vitess-sqlparser/sqlparser"
+	"github.com/siyuan-note/siyuan/kernel/util"
+)
+
+type Span struct {
+	ID       string
+	BlockID  string
+	RootID   string
+	Box      string
+	Path     string
+	Content  string
+	Markdown string
+	Type     string
+	IAL      string
+}
+
+func SelectSpansRawStmt(stmt string, limit int) (ret []*Span) {
+	parsedStmt, err := sqlparser.Parse(stmt)
+	if nil != err {
+		//util.LogErrorf("select [%s] failed: %s", stmt, err)
+		return
+	}
+	switch parsedStmt.(type) {
+	case *sqlparser.Select:
+		slct := parsedStmt.(*sqlparser.Select)
+		if nil == slct.Limit {
+			slct.Limit = &sqlparser.Limit{
+				Rowcount: &sqlparser.SQLVal{
+					Type: sqlparser.IntVal,
+					Val:  []byte(strconv.Itoa(limit)),
+				},
+			}
+		}
+
+		stmt = sqlparser.String(slct)
+	default:
+		return
+	}
+
+	stmt = strings.ReplaceAll(stmt, "\\'", "''")
+	stmt = strings.ReplaceAll(stmt, "\\\"", "\"")
+	stmt = strings.ReplaceAll(stmt, "\\\\*", "\\*")
+	stmt = strings.ReplaceAll(stmt, "from dual", "")
+	rows, err := query(stmt)
+	if nil != err {
+		if strings.Contains(err.Error(), "syntax error") {
+			return
+		}
+		util.LogWarnf("sql query [%s] failed: %s", stmt, err)
+		return
+	}
+	defer rows.Close()
+	for rows.Next() {
+		span := scanSpanRows(rows)
+		ret = append(ret, span)
+	}
+	return
+}
+
+func QueryTagSpansByKeyword(keyword string, limit int) (ret []*Span) {
+	stmt := "SELECT * FROM spans WHERE type = 'tag' AND content LIKE '%" + keyword + "%'"
+	stmt += " LIMIT " + strconv.Itoa(limit)
+	rows, err := query(stmt)
+	if nil != err {
+		util.LogErrorf("sql query failed: %s", err)
+		return
+	}
+	defer rows.Close()
+	for rows.Next() {
+		span := scanSpanRows(rows)
+		ret = append(ret, span)
+	}
+	return
+}
+
+func QueryTagSpans(p string, limit int) (ret []*Span) {
+	stmt := "SELECT * FROM spans WHERE type = 'tag'"
+	if "" != p {
+		stmt += " AND path = '" + p + "'"
+	}
+	stmt += " LIMIT " + strconv.Itoa(limit)
+	rows, err := query(stmt)
+	if nil != err {
+		util.LogErrorf("sql query failed: %s", err)
+		return
+	}
+	defer rows.Close()
+	for rows.Next() {
+		span := scanSpanRows(rows)
+		ret = append(ret, span)
+	}
+	return
+}
+
+func scanSpanRows(rows *sql.Rows) (ret *Span) {
+	var span Span
+	if err := rows.Scan(&span.ID, &span.BlockID, &span.RootID, &span.Box, &span.Path, &span.Content, &span.Markdown, &span.Type, &span.IAL); nil != err {
+		util.LogErrorf("query scan field failed: %s", err)
+		return
+	}
+	ret = &span
+	return
+}