97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
package parsers
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import (
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engine "github.com/tgckpg/mmqlengine/mmql/engine"
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stmtd "github.com/tgckpg/mmqlengine/mmql/statements"
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)
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/*
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EXPECT: BUY
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THEN EXPECT: [AmountStatement] OF [FinancialInstrumentStatement]
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THEN EXPECT: FOR [AmountStatement]
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THEN EXPECT: FROM [ExchangeType]
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THEN OPT EXPECT: [ExchangeType]
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THEN OPT EXPECT: [AND|OR]
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THEN EXPECT: [ActionExpression]
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THEN OPT EXPECT: FOR EVERY
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THEN EXPECT: [AmountType] OF [FinancialInstrumentType]
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THEN EXPECT: [SOLD|BOUGHT] FROM [ExchangeType]
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*/
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func BuyStatement( lexer *engine.Lexer ) ( istmt stmtd.IStatement, err error ) {
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orderStmt := stmtd.OrderStatement{}
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orderStmt.Action = "BUY"
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// AmountStatement
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readAmount := engine.LexerExpect{
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Statements: true,
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Keywords: false,
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Brackets: false,
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Quotes: false,
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Key: "AMOUNT",
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}
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_amountStmt, err := lexer.ReadStatement( &readAmount )
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if err != nil {
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return
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}
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amountStmt := any( _amountStmt ).( stmtd.AmountStatement )
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orderStmt.SetAmount( &amountStmt )
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var fiStmt stmtd.FinancialInstrumentStatement
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// OF
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err = lexer.ReadKeyword( "OF" )
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if err != nil {
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// try read FOR
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err = lexer.ReadKeyword( "FOR" )
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if err != nil {
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return
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}
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// BUY 1 QQQ
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fiStmt := stmtd.FinancialInstrumentStatement{}
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fiStmt.Name = amountStmt.Unit()
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// Equivalent to BUY 1 UNIT OF QQQ
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amountStmt.SetUnit( "UNITS" )
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} else {
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// BUY 1 UNIT OF QQQ
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readFI := engine.LexerExpect{
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Statements: true,
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Keywords: false,
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Brackets: false,
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Quotes: false,
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Key: "FINANCIAL_INSTRUMENT",
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}
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_fiStmt, _err := lexer.ReadStatement( &readFI )
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if _err != nil {
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err = _err
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return
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}
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fiStmt = any( _fiStmt ).( stmtd.FinancialInstrumentStatement )
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// FOR
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err = lexer.ReadKeyword( "FOR" )
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if err != nil {
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return
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}
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}
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orderStmt.SetFinancialInstrument( &fiStmt )
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// FOR [AmountStatement]
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_forStmt, err := lexer.ReadStatement( &readAmount )
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if err != nil {
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return
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}
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forStmt := any( _forStmt ).( stmtd.AmountStatement )
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orderStmt.SetFor( &forStmt )
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istmt = orderStmt
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return
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}
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