♻️ Improve av structure

kernel/av/calc.go

@@ -0,0 +1,51 @@
+// SiYuan - Refactor your thinking
+// 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 av
+
+type Calculable interface {
+	CalcCols()
+}
+
+type ColumnCalc struct {
+	Operator CalcOperator `json:"operator"`
+	Result   *Value       `json:"result"`
+}
+
+type CalcOperator string
+
+const (
+	CalcOperatorNone              CalcOperator = ""
+	CalcOperatorCountAll          CalcOperator = "Count all"
+	CalcOperatorCountValues       CalcOperator = "Count values"
+	CalcOperatorCountUniqueValues CalcOperator = "Count unique values"
+	CalcOperatorCountEmpty        CalcOperator = "Count empty"
+	CalcOperatorCountNotEmpty     CalcOperator = "Count not empty"
+	CalcOperatorPercentEmpty      CalcOperator = "Percent empty"
+	CalcOperatorPercentNotEmpty   CalcOperator = "Percent not empty"
+	CalcOperatorSum               CalcOperator = "Sum"
+	CalcOperatorAverage           CalcOperator = "Average"
+	CalcOperatorMedian            CalcOperator = "Median"
+	CalcOperatorMin               CalcOperator = "Min"
+	CalcOperatorMax               CalcOperator = "Max"
+	CalcOperatorRange             CalcOperator = "Range"
+	CalcOperatorEarliest          CalcOperator = "Earliest"
+	CalcOperatorLatest            CalcOperator = "Latest"
+	CalcOperatorChecked           CalcOperator = "Checked"
+	CalcOperatorUnchecked         CalcOperator = "Unchecked"
+	CalcOperatorPercentChecked    CalcOperator = "Percent checked"
+	CalcOperatorPercentUnchecked  CalcOperator = "Percent unchecked"
+)