// Get status updates from an account's timeline
func TwitterPublicMessagesByAccount() {
for _, territory := range socialHarvest.Config.Harvest.Territories {
// If different credentials were set for the territory, this will find and set them
harvester.NewTwitterTerritoryCredentials(territory.Name)
for _, account := range territory.Accounts.Twitter {
// Build params for search
params := url.Values{}
params.Set("include_entities", "true")
if len(territory.Content.Options.Lang) > 0 {
params.Set("lang", territory.Content.Options.Lang)
}
if len(territory.Content.Options.TwitterGeocode) > 0 {
params.Set("geocode", territory.Content.Options.TwitterGeocode)
}
harvestState := config.HarvestState{
LastId: "",
LastTime: time.Now(),
PagesHarvested: 1,
ItemsHarvested: 0,
}
// Limit to 10 pages max. Anything more will simply take too long and cause issues.
maxPages := territory.Limits.MaxResultsPages
if maxPages == 0 {
maxPages = 10
}
// Fetch X pages of results
for i := 0; i < maxPages; i++ {
lastHarvestId := socialHarvest.Database.GetLastHarvestId(territory.Name, "twitter", "TwitterPublicMessagesByAccount", account)
if lastHarvestId != "" {
params.Set("since_id", lastHarvestId)
}
// Determine if the account is by id or username (both are accepted)
if _, err := strconv.Atoi(account); err == nil {
params.Set("user_id", account)
} else {
params.Set("screen_name", account)
}
params.Set("contributor_details", "true")
updatedParams, updatedHarvestState := harvester.TwitterAccountStream(territory.Name, harvestState, params)
params = updatedParams
harvestState = updatedHarvestState
// Always save this on each page. Then if something crashes for some reason during a harvest of several pages, we can pick up where we left off. Rather than starting over again.
if harvestState.ItemsHarvested > 0 {
socialHarvest.Database.SetLastHarvestTime(territory.Name, "twitter", "TwitterPublicMessagesByAccount", account, harvestState.LastTime, harvestState.LastId, harvestState.ItemsHarvested)
}
// We also avoid using "break" because the for loop is now based on number of pages to harvest.
// But this could lead to harvesting pages taht don't exist, so we should still "break" in that case.
// Since every call to FacebookFeed() should return with a new Until value, we'll look to see if it's empty. If so, it was the latest page of results from FB. Break the loop.
if params.Get("since_id") == "" {
// log.Println("completed search - no more pages of results")
break
}
}
}
}
return
}
// Searches Twitter for status updates by territory keyword criteria
func TwitterPublicMessagesByKeyword() {
for _, territory := range socialHarvest.Config.Harvest.Territories {
// If different credentials were set for the territory, this will find and set them
harvester.NewTwitterTerritoryCredentials(territory.Name)
// Build params for search
params := url.Values{}
params.Set("include_entities", "true")
if len(territory.Content.Options.Lang) > 0 {
params.Set("lang", territory.Content.Options.Lang)
}
if len(territory.Content.Options.TwitterGeocode) > 0 {
params.Set("geocode", territory.Content.Options.TwitterGeocode)
}
// Search all keywords
if len(territory.Content.Keywords) > 0 {
for _, keyword := range territory.Content.Keywords {
log.Print("Searching for: " + keyword)
// A globally set limit in the Social Harvest config (or default of "100")
if territory.Limits.ResultsPerPage != "" {
params.Set("count", territory.Limits.ResultsPerPage)
} else {
params.Set("count", "100")
}
// Keep track of the last id harvested, the number of items harvested, etc. This information will be returend from `harvester.TwitterSearch()`
// on each call in the loop. We'll just keep incrementing the items and overwriting the last id and time. This information then gets saved to the harvest series.
// So then on the next harvest, we can see where we left off so we don't request the same data again from the API. This doesn't guarantee the prevention of dupes
// of course, but it does decrease unnecessary API calls which helps with rate limiting and efficiency.
harvestState := config.HarvestState{
LastId: "",
LastTime: time.Now(),
PagesHarvested: 1,
ItemsHarvested: 0,
}
// Limit to 10 pages max. Anything more will simply take too long and cause issues.
maxPages := territory.Limits.MaxResultsPages
if maxPages == 0 {
maxPages = 10
}
// Fetch all pages (it keeps going until there are no more, but that could be problematic for API rate limits - so in the Social Harvest config, a limit can be put on number of pages returned)
for i := 0; i < maxPages; i++ {
// Note: The "since" seems to get removed in the "next" pagination link.
// It would have worked perfectly and stopped if they held on to it as a limiter. Now, we need to hold on to it in the harvester and watch.
// When results start coming in that have a time older than this "since" value - break the loop (also note, configuration can limit pages too).
// However. If nothing has truly been posted since the last harvest, then no results will be returned when passing "since" and that will help a little.
// So always pass it. Since we only get the "next" page, we don't need to change it (and it does help particularly with account feeds).
lastHarvestId := socialHarvest.Database.GetLastHarvestId(territory.Name, "twitter", "TwitterPublicMessagesByKeyword", keyword)
if lastHarvestId != "" {
params.Set("since_id", lastHarvestId)
}
updatedParams, updatedHarvestState := harvester.TwitterSearch(territory.Name, harvestState, keyword, params)
params = updatedParams
harvestState = updatedHarvestState
//log.Println("harvested a page of results from twitter")
if harvestState.ItemsHarvested > 0 {
socialHarvest.Database.SetLastHarvestTime(territory.Name, "twitter", "TwitterPublicMessagesByKeyword", keyword, harvestState.LastTime, harvestState.LastId, harvestState.ItemsHarvested)
}
// We also avoid using "break" because the for loop is now based on number of pages to harvest.
// But this could lead to harvesting pages taht don't exist, so we should still "break" in that case.
// Since every call to FacebookFeed() should return with a new Until value, we'll look to see if it's empty. If so, it was the latest page of results from FB. Break the loop.
if params.Get("since_id") == "" {
// log.Println("completed search - no more pages of results")
break
}
}
}
}
}
log.Println("done twitter public message search")
return
}