101 lines
1.8 KiB
Go
101 lines
1.8 KiB
Go
package cli
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import (
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"fmt"
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"log"
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"gogs.inhome.blapointe.com/ana-ledger/src/ledger"
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)
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type Query struct{}
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func BuildQuery(args args) (ledger.Like, error) {
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var result ledger.Like
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var err error
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func() {
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defer func() {
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if err := recover(); err != nil {
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err = fmt.Errorf("panicked: %v", err)
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}
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}()
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result, err = buildQuery(args)
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}()
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return result, err
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}
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func buildQuery(args args) (ledger.Like, error) {
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likeName := func(s string) ledger.Like {
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return ledger.LikeName(s)
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}
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andLike := func(a, b ledger.Like) ledger.Like {
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return (ledger.Likes{a, b}).All
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}
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orLike := func(a, b ledger.Like) ledger.Like {
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return (ledger.Likes{a, b}).Any
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}
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notLike := func(a ledger.Like) ledger.Like {
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return ledger.LikeNot(a)
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}
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if !args.more() {
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return likeName(""), nil
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}
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like := likeName("ajskfdlsjfkdasj")
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for args.more() {
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switch args.peek() {
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case "and":
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args.pop()
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var like ledger.Like
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switch args.peek() {
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case "not":
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args.pop()
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log.Println("and not", args.peek())
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like = notLike(likeName(args.pop()))
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default:
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log.Println("and ", args.peek())
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like = likeName(args.pop())
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}
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like = andLike(like, like)
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case "not":
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args.pop()
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log.Println("or not ", args.peek())
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like = orLike(like, notLike(
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likeName(args.pop()),
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))
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default:
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log.Println("or ", args.peek())
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like = orLike(like,
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likeName(args.pop()),
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)
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}
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}
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return like, nil
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}
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type args []string
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func (args *args) pop() string {
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if !args.more() {
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panic("expected more arguments")
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}
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first := ""
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if len(*args) > 0 {
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first = (*args)[0]
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*args = (*args)[1:]
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}
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return first
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}
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func (args *args) peek() string {
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if len(*args) == 0 {
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return ""
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}
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return (*args)[0]
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}
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func (args *args) more() bool {
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return len(*args) > 0
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}
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