mirror of https://github.com/aclindsa/moneygo.git
89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
package reports
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import (
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"context"
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"errors"
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"fmt"
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"github.com/aclindsa/moneygo/internal/models"
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"github.com/aclindsa/moneygo/internal/store"
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"github.com/yuin/gopher-lua"
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"time"
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)
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//type and value to store user in lua's Context
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type key int
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const (
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userContextKey key = iota
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accountsContextKey
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securitiesContextKey
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balanceContextKey
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dbContextKey
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)
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const luaTimeoutSeconds time.Duration = 30 // maximum time a lua request can run for
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func RunReport(tx store.Tx, user *models.User, report *models.Report) (*models.Tabulation, error) {
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// Create a new LState without opening the default libs for security
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L := lua.NewState(lua.Options{SkipOpenLibs: true})
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defer L.Close()
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// Create a new context holding the current user with a timeout
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ctx := context.WithValue(context.Background(), userContextKey, user)
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ctx = context.WithValue(ctx, dbContextKey, tx)
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ctx, cancel := context.WithTimeout(ctx, luaTimeoutSeconds*time.Second)
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defer cancel()
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L.SetContext(ctx)
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for _, pair := range []struct {
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n string
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f lua.LGFunction
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}{
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{lua.LoadLibName, lua.OpenPackage}, // Must be first
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{lua.BaseLibName, lua.OpenBase},
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{lua.TabLibName, lua.OpenTable},
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{lua.StringLibName, lua.OpenString},
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{lua.MathLibName, lua.OpenMath},
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} {
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if err := L.CallByParam(lua.P{
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Fn: L.NewFunction(pair.f),
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NRet: 0,
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Protect: true,
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}, lua.LString(pair.n)); err != nil {
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return nil, errors.New("Error initializing Lua packages")
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}
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}
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luaRegisterAccounts(L)
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luaRegisterSecurities(L)
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luaRegisterBalances(L)
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luaRegisterDates(L)
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luaRegisterTabulations(L)
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luaRegisterPrices(L)
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err := L.DoString(report.Lua)
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if err != nil {
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return nil, err
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}
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if err := L.CallByParam(lua.P{
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Fn: L.GetGlobal("generate"),
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NRet: 1,
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Protect: true,
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}); err != nil {
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return nil, err
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}
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value := L.Get(-1)
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if ud, ok := value.(*lua.LUserData); ok {
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if tabulation, ok := ud.Value.(*models.Tabulation); ok {
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return tabulation, nil
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} else {
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return nil, fmt.Errorf("generate() for %s (Id: %d) didn't return a tabulation", report.Name, report.ReportId)
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}
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} else {
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return nil, fmt.Errorf("generate() for %s (Id: %d) didn't even return LUserData", report.Name, report.ReportId)
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}
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}
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