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timetable-extension #1

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fred.boniface wants to merge 154 commits from timetable-extension into main
pull from: timetable-extension
merge into: OwlBoard:main
Conversation 0 Commits 154 Files Changed 67 +45 -113
3 changed files with 45 additions and 113 deletions
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Showing only changes of commit 4459d4d316 - Show all commits

82
corpus/parse.go
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@ -3,6 +3,7 @@ package corpus
import (
"encoding/json"
"errors"
"io"
"git.fjla.uk/owlboard/go-types/pkg/database"
"git.fjla.uk/owlboard/timetable-mgr/log"
@ -10,50 +11,55 @@ import (
)
// Accepts CORPUS data as a byte array and formats it ready for database insertion
func parseCorpusData(jsonData *[]byte) (*[]database.CorpusEntry, error) {
func parseCorpusData(stream io.ReadCloser) (*[]database.CorpusEntry, error) {
defer stream.Close()
log.Msg.Debug("Starting CORPUS Data parsing")
// Initialise data structure
var dataMap map[string]interface{}
// Create JSON
err := json.Unmarshal(*jsonData, &dataMap)
if err != nil {
log.Msg.Error("Unable to unmarshal CORPUS data", zap.Error(err))
}
corpusDataArrayInterface, ok := dataMap["TIPLOCDATA"]
if !ok {
err := errors.New("corpus Data not in expected format")
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
corpusDataArray, ok := corpusDataArrayInterface.([]interface{})
if !ok {
err := errors.New("corpus data missing the data array")
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
var corpusEntries []database.CorpusEntry
for _, item := range corpusDataArray {
jsonItem, err := json.Marshal(item)
if err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
decoder := json.NewDecoder(stream)
var corpusEntry database.CorpusEntry
err = json.Unmarshal(jsonItem, &corpusEntry)
if err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
corpusEntries = append(corpusEntries, corpusEntry)
// Expect an object at the root of the JSON stream
if _, err := decoder.Token(); err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
// Search for the "TIPLOCDATA" key
for decoder.More() {
// Decode the next JSON token
if tok, err := decoder.Token(); err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
} else if tok == "TIPLOCDATA" {
// Found the "TIPLOCDATA" key, expect the associated array
if !decoder.More() {
err := errors.New("missing array after TIPLOCDATA key")
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
// Start reading the array associated with the "TIPLOCDATA" key
if _, err := decoder.Token(); err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
// Iterate over the JSON array
for decoder.More() {
var corpusEntry database.CorpusEntry
if err := decoder.Decode(&corpusEntry); err != nil {
log.Msg.Error("Error parsing CORPUS Data", zap.Error(err))
return nil, err
}
corpusEntries = append(corpusEntries, corpusEntry)
}
break // Exit loop after processing "TIPLOCDATA" array
}
}
log.Msg.Debug("CORPUS parsing complete")
return &corpusEntries, nil
}

2
corpus/update.go
View File

@ -10,7 +10,7 @@ import (
// Runs all stages of the CORPUS Update process
func RunCorpusUpdate(cfg *helpers.Configuration) error {
resp, err := nrod.NrodDownload(url, cfg)
resp, err := nrod.NrodStream(url, cfg)
if err != nil {
log.Msg.Error("Failed to fetch CORPUS data", zap.Error(err))
return err

74
nrod/download.go
View File

@ -1,74 +0,0 @@
package nrod
import (
"compress/gzip"
"fmt"
"io"
"net/http"
"time"
"git.fjla.uk/owlboard/timetable-mgr/helpers"
"git.fjla.uk/owlboard/timetable-mgr/log"
"go.uber.org/zap"
)
// Downloads NROD Data over HTTP from the given URL, extracted data is returned
func NrodDownload(url string, cfg *helpers.Configuration) (*[]byte, error) {
log.Msg.Debug("Fetching NROD data", zap.String("Request URL", url))
client := http.Client{
Timeout: time.Second * 10,
}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Msg.Error("Error creating HTTP Request", zap.String("Request URL", url), zap.Error(err))
return nil, err
}
req.Header.Add("Authorization", "Basic "+helpers.BasicAuth(cfg.NrodUser, cfg.NrodPass))
resp, err := client.Do(req)
if err != nil {
log.Msg.Error("Error carrying out HTTP Request", zap.String("Request URL", url), zap.Error(err))
return nil, err
}
if resp.StatusCode != http.StatusOK {
err := fmt.Errorf("unexpected status code: %d", resp.StatusCode)
log.Msg.Error("Non-Successful status code from http response", zap.String("Request URL", url), zap.Error(err))
return nil, err
}
// Yes, I know `readedData` is not proper English. But readData reads more like a verb action.
readedData, err := nrodExtract(resp)
if err != nil {
log.Msg.Error("Unable to read response data")
return nil, err
}
return readedData, nil
}
// Extracts GZIP Data from an HTTP Response and returns the decompresses data as a byte array
func nrodExtract(resp *http.Response) (*[]byte, error) {
log.Msg.Debug("Extracting HTTP Response Data")
gzReader, err := gzip.NewReader(resp.Body)
if err != nil {
log.Msg.Warn("Unable to create GZIP Reader, data probably not GZIPPED")
data, err := io.ReadAll(resp.Body)
if err != nil {
log.Msg.Error("Unable to read response body")
return nil, err
}
return &data, nil
}
defer gzReader.Close()
log.Msg.Debug("GZIP Reader Opened")
extractedData, err := io.ReadAll(gzReader)
if err != nil {
log.Msg.Error("Failed to read GZIPped data", zap.Error(err))
}
return &extractedData, nil
}