cmd/dynamo-browse
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Added the "export -all" switch (#54)

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Extended the "export" command with an "-all" flag. When included, all rows of the table matching the query will be exported to CSV.
This commit is contained in:
Leon Mika 2023-07-31 20:59:05 +10:00 committed by GitHub
parent 20a9a8c758
commit ed53173a1d
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 150 additions and 44 deletions
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2
cmd/dynamo-browse/main.go
View file

@ -108,7 +108,7 @@ func main() {
tableReadController := controllers.NewTableReadController(state, tableService, workspaceService, itemRendererService, jobsController, inputHistoryService, eventBus, *flagTable)
tableWriteController := controllers.NewTableWriteController(state, tableService, jobsController, tableReadController, settingStore)
columnsController := controllers.NewColumnsController(eventBus)
exportController := controllers.NewExportController(state, columnsController)
exportController := controllers.NewExportController(state, tableService, jobsController, columnsController)
settingsController := controllers.NewSettingsController(settingStore, eventBus)
keyBindings := keybindings.Default()
scriptController := controllers.NewScriptController(scriptManagerService, tableReadController, settingsController, eventBus)

8
internal/common/sliceutils/map.go
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@ -9,6 +9,14 @@ func All[T any](ts []T, predicate func(t T) bool) bool {
return true
}
func Generate[U any](from, to int, fn func(t int) U) []U {
us := make([]U, to-from+1)
for i := from; i <= to; i++ {
us[i-from] = fn(i)
}
return us
}
func Map[T, U any](ts []T, fn func(t T) U) []U {
us := make([]U, len(ts))
for i, t := range ts {

94
internal/dynamo-browse/controllers/export.go
View file

@ -1,57 +1,85 @@
package controllers
import (
"context"
"encoding/csv"
"fmt"
tea "github.com/charmbracelet/bubbletea"
"github.com/lmika/dynamo-browse/internal/common/ui/events"
"github.com/lmika/dynamo-browse/internal/dynamo-browse/models/attrutils"
"github.com/lmika/dynamo-browse/internal/dynamo-browse/services/jobs"
"github.com/pkg/errors"
"os"
)
type ExportController struct {
state *State
columns *ColumnsController
state *State
tableService TableReadService
jobController *JobsController
columns *ColumnsController
}
func NewExportController(state *State, columns *ColumnsController) *ExportController {
return &ExportController{state, columns}
func NewExportController(state *State, tableService TableReadService, jobsController *JobsController, columns *ColumnsController) *ExportController {
return &ExportController{state, tableService, jobsController, columns}
}
func (c *ExportController) ExportCSV(filename string) tea.Msg {
func (c *ExportController) ExportCSV(filename string, opts ExportOptions) tea.Msg {
resultSet := c.state.ResultSet()
if resultSet == nil {
return events.Error(errors.New("no result set"))
}
f, err := os.Create(filename)
if err != nil {
return events.Error(errors.Wrapf(err, "cannot export to '%v'", filename))
}
defer f.Close()
cw := csv.NewWriter(f)
defer cw.Flush()
columns := c.columns.Columns().VisibleColumns()
colNames := make([]string, len(columns))
for i, c := range columns {
colNames[i] = c.Name
}
if err := cw.Write(colNames); err != nil {
return events.Error(errors.Wrapf(err, "cannot export to '%v'", filename))
}
row := make([]string, len(columns))
for _, item := range resultSet.Items() {
for i, col := range columns {
row[i], _ = attrutils.AttributeToString(col.Evaluator.EvaluateForItem(item))
return NewJob(c.jobController, fmt.Sprintf("Exporting to %v…", filename), func(ctx context.Context) (int, error) {
f, err := os.Create(filename)
if err != nil {
return 0, errors.Wrapf(err, "cannot export to '%v'", filename)
}
if err := cw.Write(row); err != nil {
return events.Error(errors.Wrapf(err, "cannot export to '%v'", filename))
}
}
defer f.Close()
return nil
cw := csv.NewWriter(f)
defer cw.Flush()
columns := c.columns.Columns().VisibleColumns()
colNames := make([]string, len(columns))
for i, c := range columns {
colNames[i] = c.Name
}
if err := cw.Write(colNames); err != nil {
return 0, errors.Wrapf(err, "cannot export to '%v'", filename)
}
totalRows := 0
row := make([]string, len(columns))
for {
for _, item := range resultSet.Items() {
for i, col := range columns {
row[i], _ = attrutils.AttributeToString(col.Evaluator.EvaluateForItem(item))
}
if err := cw.Write(row); err != nil {
return 0, errors.Wrapf(err, "cannot export to '%v'", filename)
}
}
totalRows += len(resultSet.Items())
if !opts.AllResults || !resultSet.HasNextPage() {
break
}
jobs.PostUpdate(ctx, fmt.Sprintf("exported %d items", totalRows))
resultSet, err = c.tableService.NextPage(ctx, resultSet)
if err != nil {
return 0, errors.Wrapf(err, "cannot get next page while exporting to '%v'", filename)
}
}
return totalRows, nil
}).OnDone(func(rows int) tea.Msg {
return events.StatusMsg(applyToN("Exported ", rows, "item", "items", " to "+filename))
}).Submit()
}
type ExportOptions struct {
// AllResults returns all results from the table
AllResults bool
}

64
internal/dynamo-browse/controllers/export_test.go
View file

@ -1,6 +1,9 @@
package controllers_test
import (
"fmt"
"github.com/lmika/dynamo-browse/internal/common/sliceutils"
"github.com/lmika/dynamo-browse/internal/dynamo-browse/controllers"
"github.com/stretchr/testify/assert"
"os"
"strings"
@ -14,7 +17,7 @@ func TestExportController_ExportCSV(t *testing.T) {
tempFile := tempFile(t)
invokeCommand(t, srv.readController.Init())
invokeCommand(t, srv.exportController.ExportCSV(tempFile))
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
@ -27,13 +30,66 @@ func TestExportController_ExportCSV(t *testing.T) {
}, ""))
})
t.Run("should export all pages of the results", func(t *testing.T) {
pageLimits := []int{5, 10, 50}
for _, pageLimit := range pageLimits {
t.Run(fmt.Sprintf("page size %d", pageLimit), func(t *testing.T) {
t.Run("all results", func(t *testing.T) {
srv := newService(t, serviceConfig{tableName: "count-to-30", defaultLimit: 5})
tempFile := tempFile(t)
expected := append([]string{
"pk,sk,num\n",
}, sliceutils.Generate(1, 30, func(i int) string {
return fmt.Sprintf("NUM,NUM#%02d,%d\n", i, i)
})...)
invokeCommand(t, srv.readController.Init())
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{
AllResults: true,
}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
assert.Equal(t, strings.Join(expected, ""), string(bts))
})
t.Run("with query", func(t *testing.T) {
srv := newService(t, serviceConfig{tableName: "count-to-30", defaultLimit: 5})
tempFile := tempFile(t)
expected := append([]string{
"pk,sk,num\n",
}, sliceutils.Generate(1, 15, func(i int) string {
return fmt.Sprintf("NUM,NUM#%02d,%d\n", i, i)
})...)
invokeCommand(t, srv.readController.Init())
invokeCommandWithPrompt(t, srv.readController.PromptForQuery(), "num<=15")
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{
AllResults: true,
}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
assert.Equal(t, strings.Join(expected, ""), string(bts))
})
})
}
})
t.Run("should return error if result set is not set", func(t *testing.T) {
srv := newService(t, serviceConfig{tableName: "non-existant-table"})
tempFile := tempFile(t)
invokeCommandExpectingError(t, srv.readController.Init())
invokeCommandExpectingError(t, srv.exportController.ExportCSV(tempFile))
invokeCommandExpectingError(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
})
t.Run("should honour new columns in CSV file", func(t *testing.T) {
@ -48,7 +104,7 @@ func TestExportController_ExportCSV(t *testing.T) {
invokeCommandWithPrompt(t, srv.columnsController.AddColumn(1), "address.street")
invokeCommand(t, srv.columnsController.ShiftColumnLeft(1))
invokeCommand(t, srv.exportController.ExportCSV(tempFile))
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
@ -71,7 +127,7 @@ func TestExportController_ExportCSV(t *testing.T) {
invokeCommand(t, srv.columnsController.ToggleVisible(1))
invokeCommand(t, srv.columnsController.ToggleVisible(2))
invokeCommand(t, srv.exportController.ExportCSV(tempFile))
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)

3
internal/dynamo-browse/controllers/jobbuilder.go
View file

@ -51,6 +51,9 @@ func (jb JobBuilder[T]) executeJob(ctx context.Context) tea.Msg {
if jb.onEither != nil {
return jb.onEither(res, err)
} else if err == nil {
if jb.onDone == nil {
return nil
}
return jb.onDone(res)
} else {
if jb.onErr != nil {

2
internal/dynamo-browse/controllers/tableread.go
View file

@ -377,7 +377,7 @@ func (c *TableReadController) NextPage() tea.Msg {
resultSet := c.state.ResultSet()
if resultSet == nil {
return events.StatusMsg("Result-set is nil")
} else if resultSet.LastEvaluatedKey == nil {
} else if !resultSet.HasNextPage() {
return events.StatusMsg("No more results")
}
currentFilter := c.state.filter

6
internal/dynamo-browse/controllers/tableread_test.go
View file

@ -89,7 +89,7 @@ func TestTableReadController_Query(t *testing.T) {
invokeCommand(t, srv.readController.Init())
invokeCommandWithPrompts(t, srv.readController.PromptForQuery(), `pk ^= "abc"`)
invokeCommand(t, srv.exportController.ExportCSV(tempFile))
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
@ -107,7 +107,7 @@ func TestTableReadController_Query(t *testing.T) {
invokeCommand(t, srv.readController.Init())
invokeCommandWithPrompts(t, srv.readController.PromptForQuery(), `alpha = "This is some value"`)
invokeCommand(t, srv.exportController.ExportCSV(tempFile))
invokeCommand(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
bts, err := os.ReadFile(tempFile)
assert.NoError(t, err)
@ -124,7 +124,7 @@ func TestTableReadController_Query(t *testing.T) {
tempFile := tempFile(t)
invokeCommandExpectingError(t, srv.readController.Init())
invokeCommandExpectingError(t, srv.exportController.ExportCSV(tempFile))
invokeCommandExpectingError(t, srv.exportController.ExportCSV(tempFile, controllers.ExportOptions{}))
})
}

2
internal/dynamo-browse/controllers/tablewrite_test.go
View file

@ -621,7 +621,7 @@ func newService(t *testing.T, cfg serviceConfig) *services {
writeController := controllers.NewTableWriteController(state, service, jobsController, readController, settingStore)
settingsController := controllers.NewSettingsController(settingStore, eventBus)
columnsController := controllers.NewColumnsController(eventBus)
exportController := controllers.NewExportController(state, columnsController)
exportController := controllers.NewExportController(state, service, jobsController, columnsController)
scriptController := controllers.NewScriptController(scriptService, readController, settingsController, eventBus)
commandController := commandctrl.NewCommandController(inputHistoryService)

4
internal/dynamo-browse/models/models.go
View file

@ -135,3 +135,7 @@ func (rs *ResultSet) RefreshColumns() {
rs.columns = columns
}
func (rs *ResultSet) HasNextPage() bool {
return rs.LastEvaluatedKey != nil
}

9
internal/dynamo-browse/ui/model.go
View file

@ -102,7 +102,14 @@ func NewModel(
if len(args) == 0 {
return events.Error(errors.New("expected filename"))
}
return exportController.ExportCSV(args[0])
opts := controllers.ExportOptions{}
if len(args) == 2 && args[0] == "-all" {
opts.AllResults = true
args = args[1:]
}
return exportController.ExportCSV(args[0], opts)
},
"mark": func(ctx commandctrl.ExecContext, args []string) tea.Msg {
var markOp = controllers.MarkOpMark