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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "net/url" | ||
| // "github.com/davecgh/go-spew/spew" | ||
| "strconv" | ||
|
|
||
| "github.com/denkhaus/neoism" | ||
| "github.com/juju/errors" | ||
| ) | ||
|
|
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| func (p *Engine) execQuery(db *neoism.Database, statmnt string, props neoism.Props) (*CypherResult, error) { | ||
|
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| res := NewCypherResult() | ||
| cq := neoism.CypherQuery{ | ||
| Statement: statmnt, | ||
| Result: &res.Raw, | ||
| Parameters: props, | ||
| } | ||
|
|
||
| if err := db.Cypher(&cq); err != nil { | ||
| return nil, errors.Annotate(err, "db query") | ||
| } | ||
|
|
||
| return res, nil | ||
| } | ||
|
|
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| func (p *Engine) MaintainGraph() error { | ||
| logger.Info("maintain graph") | ||
|
|
||
| db, err := p.ensureClients() | ||
| if err != nil { | ||
| return errors.Annotate(err, "ensure clients") | ||
| } | ||
|
|
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| res, err := p.execQuery(db, CYPHER_NEED_GRAPH_UPDATE, nil) | ||
| if err != nil { | ||
| return errors.Annotate(err, "exec following mismatch") | ||
| } | ||
|
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| ids := res.FilterResultsBy("id").ToStringSlice() | ||
|
|
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| if len(ids) > 0 { | ||
|
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| commonIdCount := 0 | ||
| params := url.Values{} | ||
|
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| for _, idStr := range ids { | ||
|
|
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| if commonIdCount != 0 { | ||
| logger.Infof("%d relations updated", commonIdCount) | ||
| } | ||
|
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| logger.Infof("update user #%s following relations", idStr) | ||
|
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| props := neoism.Props{ | ||
| "id": idStr, | ||
| } | ||
|
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| logger.Infof("remove following relations for user #%s", idStr) | ||
| _, err = p.execQuery(db, CYPHER_REMOVE_FOLLOWS_REL, props) | ||
| if err != nil { | ||
| return errors.Annotate(err, "exec remove follows relationship") | ||
| } | ||
|
|
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| commonIdCount = 0 | ||
| params.Set("user_id", idStr) | ||
| cursor := "-1" | ||
|
|
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| for { | ||
|
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| logger.Infof("retrive users user #%s is following", idStr) | ||
|
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| params.Set("cursor", cursor) | ||
| cur, err := p.api.GetFriendsIds(params) | ||
| if err != nil { | ||
| return errors.Annotate(err, "get friends ids") | ||
| } | ||
|
|
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| idCount := len(cur.Ids) | ||
| if idCount == 0 { | ||
| break | ||
| } | ||
|
|
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| commonIdCount += idCount | ||
| props = neoism.Props{ | ||
| "user_id": idStr, | ||
| "ids": toString(cur.Ids), | ||
| } | ||
|
|
||
| logger.Infof("merge %d users user #%s is following", idCount, idStr) | ||
| _, err = p.execQuery(db, CYPHER_MERGE_FOLLOWING_IDS, props) | ||
| if err != nil { | ||
| return errors.Annotate(err, "insert following ids") | ||
| } | ||
|
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| cursor = cur.Next_cursor_str | ||
| } | ||
| } | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
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| func toString(arr []int64) []string { | ||
|
|
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| ret := make([]string, len(arr)) | ||
| for idx, val := range arr { | ||
| ret[idx] = strconv.FormatInt(val, 10) | ||
| } | ||
|
|
||
| return ret | ||
| } |
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