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* wip: provide model interface for table data * refactor: rename Model to Data * refactor: add `Row` method * refactor: use `Row` method * fix: examples to Data interface --------- Co-authored-by: Christian Muehlhaeuser <muesli@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package table | ||
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| // Data is the interface that wraps the basic methods of a table model. | ||
| type Data interface { | ||
| Row(row int) Row | ||
| Append(row Row) | ||
| Count() int | ||
| Columns() int | ||
| } | ||
|
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| // Row represents one line in the table. | ||
| type Row interface { | ||
| Column(col int) string | ||
| Length() int | ||
| } | ||
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| // StringData is a string-based implementation of the Data interface. | ||
| type StringData struct { | ||
| rows []Row | ||
| columns int | ||
| } | ||
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| // Rows creates a new StringData with the given number of columns. | ||
| func Rows(rows ...[]string) *StringData { | ||
| m := StringData{columns: 0} | ||
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| for _, row := range rows { | ||
| m.columns = max(m.columns, len(row)) | ||
| m.rows = append(m.rows, StringRow(row)) | ||
| } | ||
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| return &m | ||
| } | ||
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| // Append appends the given row to the table. | ||
| func (m *StringData) Append(row Row) { | ||
| m.columns = max(m.columns, row.Length()) | ||
| m.rows = append(m.rows, row) | ||
| } | ||
|
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| // Row returns the row at the given index. | ||
| func (m *StringData) Row(row int) Row { | ||
| return m.rows[row] | ||
| } | ||
|
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| // Columns returns the number of columns in the table. | ||
| func (m *StringData) Columns() int { | ||
| return m.columns | ||
| } | ||
|
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| // Item appends the given row to the table. | ||
| func (m *StringData) Item(rows ...string) *StringData { | ||
| m.columns = max(m.columns, len(rows)) | ||
| m.rows = append(m.rows, StringRow(rows)) | ||
| return m | ||
| } | ||
|
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| // Count returns the number of rows in the table. | ||
| func (m *StringData) Count() int { | ||
| return len(m.rows) | ||
| } | ||
|
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| // StringRow is a simple implementation of the Row interface. | ||
| type StringRow []string | ||
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| // Value returns the value of the column at the given index. | ||
| func (r StringRow) Column(col int) string { | ||
| if col >= len(r) { | ||
| return "" | ||
| } | ||
|
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| return r[col] | ||
| } | ||
|
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| // Value returns the value of the column at the given index. | ||
| func (r StringRow) Length() int { | ||
| return len(r) | ||
| } | ||
|
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| // Filter applies a filter on some data. | ||
| type Filter struct { | ||
| data Data | ||
| filter func(row Row) bool | ||
| } | ||
|
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| // NewFilter initializes a new Filter. | ||
| func NewFilter(data Data) *Filter { | ||
| return &Filter{data: data} | ||
| } | ||
|
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| // Filter applies the given filter function to the data. | ||
| func (m *Filter) Filter(f func(row Row) bool) *Filter { | ||
| m.filter = f | ||
| return m | ||
| } | ||
|
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| // Row returns the row at the given index. | ||
| func (m *Filter) Row(row int) Row { | ||
| j := 0 | ||
| for i := 0; i < m.data.Count(); i++ { | ||
| if m.filter(m.data.Row(i)) { | ||
| if j == row { | ||
| return m.data.Row(i) | ||
| } | ||
|
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| j++ | ||
| } | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| // Append appends the given row to the table. | ||
| func (m *Filter) Append(row Row) { | ||
| m.data.Append(row) | ||
| } | ||
|
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| // Columns returns the number of columns in the table. | ||
| func (m *Filter) Columns() int { | ||
| return m.data.Columns() | ||
| } | ||
|
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| // Count returns the number of rows in the table. | ||
| func (m *Filter) Count() int { | ||
| j := 0 | ||
| for i := 0; i < m.data.Count(); i++ { | ||
| if m.filter(m.data.Row(i)) { | ||
| j++ | ||
| } | ||
| } | ||
|
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| return j | ||
| } |
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