Created
February 10, 2018 10:46
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parse a data.csv in go
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// -*- compile-command: "go run *.go sample.csv" -*- | |
package main | |
import ( | |
"bufio" | |
"encoding/json" | |
"fmt" | |
"io" | |
"os" | |
"strings" | |
) | |
var material_albedo_diffuse = 0 | |
var material_specular_metalness = 0 | |
var material_specular_metalness_off = 0 | |
func process_line(line string) { | |
splits := strings.SplitN(line, ",", 2) | |
modelID := splits[0] | |
modelID = modelID[1 : len(modelID)-1] | |
jsonString := splits[1] | |
jsonString = strings.Replace(jsonString, "\"\"", "\"", -1) | |
jsonString = jsonString[1 : len(jsonString)-2] | |
byt := []byte(jsonString) | |
var jsonStruct map[string]interface{} | |
if err := json.Unmarshal(byt, &jsonStruct); err != nil { | |
panic(err) | |
} | |
material_diffuse := false | |
material_albedo := false | |
material_specular := false | |
material_metalness := false | |
delete(jsonStruct, "updatedAt") | |
for _, v := range jsonStruct { | |
materials := v.(map[string]interface{}) | |
channels := materials["channels"].(map[string]interface{}) | |
diffuse_pbr := channels["DiffusePBR"].(map[string]interface{}) | |
albedo_pbr := channels["AlbedoPBR"].(map[string]interface{}) | |
metalness_pbr := channels["MetalnessPBR"].(map[string]interface{}) | |
specular_pbr := channels["SpecularPBR"].(map[string]interface{}) | |
if diffuse_pbr["enable"].(bool) { | |
material_diffuse = true | |
} | |
if albedo_pbr["enable"].(bool) { | |
material_albedo = true | |
} | |
metal_enable := metalness_pbr["enable"].(bool) | |
if metal_enable { | |
material_metalness = true | |
} | |
spec_enable := specular_pbr["enable"].(bool) | |
if spec_enable { | |
material_specular = true | |
} | |
if !metal_enable && !spec_enable { | |
material_specular_metalness_off += 1 | |
fmt.Println(modelID) | |
break | |
} | |
if material_albedo && material_diffuse { | |
material_albedo_diffuse += 1 | |
fmt.Println(modelID) | |
break | |
} | |
if material_metalness && material_specular { | |
material_specular_metalness += 1 | |
fmt.Println(modelID) | |
break | |
} | |
} | |
} | |
func readFileWithReadString(fn string) (err error) { | |
file, err := os.Open(fn) | |
if err != nil { | |
return err | |
} | |
// Start reading from the file with a reader. | |
reader := bufio.NewReader(file) | |
var line string | |
// strip first line | |
line, err = reader.ReadString('\n') | |
for { | |
line, err = reader.ReadString('\n') | |
if len(line) > 0 { | |
go process_line(line) | |
} | |
if err != nil { | |
break | |
} | |
} | |
fmt.Printf("case specular/metalness %d, albedo/diffuse %d, specular/metalness off %d\n", material_specular_metalness, material_albedo_diffuse, material_specular_metalness_off) | |
if err != io.EOF { | |
fmt.Printf(" > Failed!: %v\n", err) | |
} | |
defer file.Close() | |
return | |
} | |
func main() { | |
// https://stackoverflow.com/questions/1821811/how-to-read-write-from-to-file-using-go#9739903 | |
// read the whole file at once | |
if len(os.Args) > 1 { | |
filename := os.Args[1] | |
readFileWithReadString(filename) | |
} else { | |
fmt.Println("usage " + os.Args[0] + " filename.csv") | |
} | |
} |
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