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exec.go
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exec.go
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package prisma
import (
"context"
"strconv"
"github.com/mitchellh/mapstructure"
)
func (client *Client) decode(exec *Exec, data map[string]interface{}, v interface{}) (bool, error) {
var genericData interface{} // This can handle both map[string]interface{} and []interface[]
unpackedData := data
for _, instruction := range exec.Stack {
v := (unpackedData[instruction.Name])
if v == nil {
return false, nil
}
if isArray(v) {
genericData = v.([]interface{})
break
} else {
unpackedData = v.(map[string]interface{})
}
genericData = unpackedData
}
return true, mapstructure.Decode(genericData, v)
}
func (exec *Exec) buildQuery() (string, map[string]interface{}) {
var allArgs []graphQLArg
variables := make(map[string]interface{})
for i := range exec.Stack {
instruction := &exec.Stack[i]
for j := range instruction.Args {
arg := &instruction.Args[j]
isUnique := false
for !isUnique {
isUnique = true
for key, existingArg := range allArgs {
if existingArg.Name == arg.Name {
isUnique = false
arg.Name = arg.Name + "_" + strconv.Itoa(key)
break
}
}
}
allArgs = append(allArgs, *arg)
variables[arg.Name] = arg.Value
}
}
query := exec.Client.ProcessInstructions(exec.Stack)
return query, variables
}
func (exec *Exec) Exec(ctx context.Context, v interface{}) (bool, error) {
query, variables := exec.buildQuery()
data, err := exec.Client.GraphQL(ctx, query, variables)
if err != nil {
return false, err
}
if data == nil {
return false, nil
}
return exec.Client.decode(exec, data, v)
}
func (exec *Exec) Exists(ctx context.Context) (bool, error) {
query, variables := exec.buildQuery()
data, err := exec.Client.GraphQL(ctx, query, variables)
if err != nil {
return false, err
}
if len(data) == 0 {
return false, nil
}
for _, v := range data {
return v != nil, nil
}
panic("unreachable")
}
func (exec *Exec) ExecArray(ctx context.Context, v interface{}) error {
query := exec.Client.ProcessInstructions(exec.Stack)
variables := make(map[string]interface{})
for _, instruction := range exec.Stack {
for _, arg := range instruction.Args {
variables[arg.Name] = arg.Value
}
}
data, err := exec.Client.GraphQL(ctx, query, variables)
if err != nil {
return err
}
_, err = exec.Client.decode(exec, data, v)
return err
}
func (exec *BatchPayloadExec) Exec(ctx context.Context) (BatchPayload, error) {
sexec := &Exec{Stack: exec.stack}
query, variables := sexec.buildQuery()
data, err := exec.client.GraphQL(ctx, query, variables)
if err != nil {
return BatchPayload{}, err
}
var bp BatchPayload
_, err = exec.client.decode(sexec, data, &bp)
return bp, err
}