347 lines
8.7 KiB
Go
347 lines
8.7 KiB
Go
package qgen
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import (
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"database/sql"
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"strconv"
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)
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type accDeleteBuilder struct {
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table string
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where string
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build *Accumulator
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}
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func (builder *accDeleteBuilder) Where(where string) *accDeleteBuilder {
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if builder.where != "" {
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builder.where += " AND "
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}
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builder.where += where
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return builder
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}
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func (builder *accDeleteBuilder) Prepare() *sql.Stmt {
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return builder.build.SimpleDelete(builder.table, builder.where)
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}
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func (builder *accDeleteBuilder) Run(args ...interface{}) (int, error) {
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stmt := builder.Prepare()
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if stmt == nil {
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return 0, builder.build.FirstError()
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}
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res, err := stmt.Exec(args...)
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if err != nil {
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return 0, err
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}
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lastID, err := res.LastInsertId()
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return int(lastID), err
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}
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type accUpdateBuilder struct {
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up *updatePrebuilder
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build *Accumulator
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}
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func (u *accUpdateBuilder) Set(set string) *accUpdateBuilder {
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u.up.set = set
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return u
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}
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func (u *accUpdateBuilder) Where(where string) *accUpdateBuilder {
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if u.up.where != "" {
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u.up.where += " AND "
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}
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u.up.where += where
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return u
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}
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func (u *accUpdateBuilder) DateCutoff(column string, quantity int, unit string) *accUpdateBuilder {
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u.up.dateCutoff = &dateCutoff{column, quantity, unit, 0}
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return u
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}
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func (u *accUpdateBuilder) DateOlderThan(column string, quantity int, unit string) *accUpdateBuilder {
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u.up.dateCutoff = &dateCutoff{column, quantity, unit, 1}
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return u
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}
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func (u *accUpdateBuilder) WhereQ(sel *selectPrebuilder) *accUpdateBuilder {
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u.up.whereSubQuery = sel
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return u
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}
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func (u *accUpdateBuilder) Prepare() *sql.Stmt {
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if u.up.whereSubQuery != nil {
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return u.build.prepare(u.build.adapter.SimpleUpdateSelect(u.up))
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}
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return u.build.prepare(u.build.adapter.SimpleUpdate(u.up))
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}
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func (u *accUpdateBuilder) Exec(args ...interface{}) (res sql.Result, err error) {
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query, err := u.build.adapter.SimpleUpdate(u.up)
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if err != nil {
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return res, err
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}
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return u.build.exec(query, args...)
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}
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type AccSelectBuilder struct {
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table string
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columns string
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where string
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orderby string
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limit string
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dateCutoff *dateCutoff // We might want to do this in a slightly less hacky way
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inChain *AccSelectBuilder
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inColumn string
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build *Accumulator
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}
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func (builder *AccSelectBuilder) Columns(columns string) *AccSelectBuilder {
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builder.columns = columns
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return builder
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}
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func (builder *AccSelectBuilder) Cols(columns string) *AccSelectBuilder {
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builder.columns = columns
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return builder
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}
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func (builder *AccSelectBuilder) Where(where string) *AccSelectBuilder {
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if builder.where != "" {
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builder.where += " AND "
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}
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builder.where += where
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return builder
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}
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// TODO: Don't implement the SQL at the accumulator level but the adapter level
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func (selectItem *AccSelectBuilder) In(column string, inList []int) *AccSelectBuilder {
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if len(inList) == 0 {
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return selectItem
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}
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var where = column + " IN("
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for _, item := range inList {
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where += strconv.Itoa(item) + ","
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}
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where = where[:len(where)-1] + ")"
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if selectItem.where != "" {
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where += " AND " + selectItem.where
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}
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selectItem.where = where
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return selectItem
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}
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func (selectItem *AccSelectBuilder) InQ(column string, subBuilder *AccSelectBuilder) *AccSelectBuilder {
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selectItem.inChain = subBuilder
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selectItem.inColumn = column
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return selectItem
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}
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func (builder *AccSelectBuilder) DateCutoff(column string, quantity int, unit string) *AccSelectBuilder {
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builder.dateCutoff = &dateCutoff{column, quantity, unit, 0}
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return builder
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}
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func (builder *AccSelectBuilder) Orderby(orderby string) *AccSelectBuilder {
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builder.orderby = orderby
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return builder
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}
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func (builder *AccSelectBuilder) Limit(limit string) *AccSelectBuilder {
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builder.limit = limit
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return builder
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}
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func (builder *AccSelectBuilder) Prepare() *sql.Stmt {
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// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
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if builder.dateCutoff != nil || builder.inChain != nil {
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selectBuilder := builder.build.GetAdapter().Builder().Select().FromAcc(builder)
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return builder.build.prepare(builder.build.GetAdapter().ComplexSelect(selectBuilder))
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}
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return builder.build.SimpleSelect(builder.table, builder.columns, builder.where, builder.orderby, builder.limit)
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}
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func (builder *AccSelectBuilder) query() (string, error) {
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// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
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if builder.dateCutoff != nil || builder.inChain != nil {
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selectBuilder := builder.build.GetAdapter().Builder().Select().FromAcc(builder)
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return builder.build.GetAdapter().ComplexSelect(selectBuilder)
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}
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return builder.build.adapter.SimpleSelect("", builder.table, builder.columns, builder.where, builder.orderby, builder.limit)
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}
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func (builder *AccSelectBuilder) Query(args ...interface{}) (*sql.Rows, error) {
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stmt := builder.Prepare()
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if stmt != nil {
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return stmt.Query(args...)
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}
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return nil, builder.build.FirstError()
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}
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type AccRowWrap struct {
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row *sql.Row
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err error
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}
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func (wrap *AccRowWrap) Scan(dest ...interface{}) error {
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if wrap.err != nil {
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return wrap.err
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}
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return wrap.row.Scan(dest...)
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}
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// TODO: Test to make sure the errors are passed up properly
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func (builder *AccSelectBuilder) QueryRow(args ...interface{}) *AccRowWrap {
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stmt := builder.Prepare()
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if stmt != nil {
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return &AccRowWrap{stmt.QueryRow(args...), nil}
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}
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return &AccRowWrap{nil, builder.build.FirstError()}
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}
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// Experimental, reduces lines
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func (builder *AccSelectBuilder) Each(handle func(*sql.Rows) error) error {
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query, err := builder.query()
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if err != nil {
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return err
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}
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rows, err := builder.build.query(query)
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if err != nil {
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return err
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}
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defer rows.Close()
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for rows.Next() {
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err = handle(rows)
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if err != nil {
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return err
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}
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}
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return rows.Err()
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}
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func (builder *AccSelectBuilder) EachInt(handle func(int) error) error {
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query, err := builder.query()
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if err != nil {
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return err
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}
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rows, err := builder.build.query(query)
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if err != nil {
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return err
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}
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defer rows.Close()
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for rows.Next() {
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var theInt int
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err = rows.Scan(&theInt)
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if err != nil {
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return err
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}
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err = handle(theInt)
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if err != nil {
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return err
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}
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}
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return rows.Err()
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}
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type accInsertBuilder struct {
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table string
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columns string
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fields string
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build *Accumulator
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}
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func (insert *accInsertBuilder) Columns(columns string) *accInsertBuilder {
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insert.columns = columns
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return insert
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}
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func (insert *accInsertBuilder) Fields(fields string) *accInsertBuilder {
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insert.fields = fields
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return insert
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}
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func (insert *accInsertBuilder) Prepare() *sql.Stmt {
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return insert.build.SimpleInsert(insert.table, insert.columns, insert.fields)
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}
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func (builder *accInsertBuilder) Exec(args ...interface{}) (res sql.Result, err error) {
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query, err := builder.build.adapter.SimpleInsert("", builder.table, builder.columns, builder.fields)
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if err != nil {
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return res, err
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}
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return builder.build.exec(query, args...)
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}
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func (builder *accInsertBuilder) Run(args ...interface{}) (int, error) {
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query, err := builder.build.adapter.SimpleInsert("", builder.table, builder.columns, builder.fields)
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if err != nil {
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return 0, err
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}
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res, err := builder.build.exec(query, args...)
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if err != nil {
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return 0, err
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}
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lastID, err := res.LastInsertId()
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return int(lastID), err
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}
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type accCountBuilder struct {
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table string
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where string
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limit string
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dateCutoff *dateCutoff // We might want to do this in a slightly less hacky way
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inChain *AccSelectBuilder
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inColumn string
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build *Accumulator
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}
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func (b *accCountBuilder) Where(where string) *accCountBuilder {
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if b.where != "" {
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b.where += " AND "
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}
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b.where += where
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return b
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}
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func (b *accCountBuilder) Limit(limit string) *accCountBuilder {
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b.limit = limit
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return b
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}
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func (b *accCountBuilder) DateCutoff(column string, quantity int, unit string) *accCountBuilder {
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b.dateCutoff = &dateCutoff{column, quantity, unit, 0}
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return b
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}
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// TODO: Fix this nasty hack
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func (b *accCountBuilder) Prepare() *sql.Stmt {
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// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
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if b.dateCutoff != nil || b.inChain != nil {
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selBuilder := b.build.GetAdapter().Builder().Count().FromCountAcc(b)
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selBuilder.columns = "COUNT(*)"
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return b.build.prepare(b.build.GetAdapter().ComplexSelect(selBuilder))
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}
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return b.build.SimpleCount(b.table, b.where, b.limit)
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}
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func (b *accCountBuilder) Total() (total int, err error) {
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stmt := b.Prepare()
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if stmt == nil {
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return 0, b.build.FirstError()
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}
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err = stmt.QueryRow().Scan(&total)
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return total, err
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}
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// TODO: Add a Sum builder for summing viewchunks up into one number for the dashboard?
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