Commit 8bec68a1e83749a81074acbe3fac31ace729a0bd
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added reload tables as a separate func
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json_utility.go
1 | package webutility | 1 | package webutility |
2 | 2 | ||
3 | import ( | 3 | import ( |
4 | "encoding/json" | 4 | "encoding/json" |
5 | "errors" | 5 | "errors" |
6 | "io" | 6 | "io" |
7 | "net/http" | 7 | "net/http" |
8 | "sync" | 8 | "sync" |
9 | 9 | ||
10 | "gopkg.in/rana/ora.v4" | 10 | "gopkg.in/rana/ora.v4" |
11 | ) | 11 | ) |
12 | 12 | ||
13 | var mu = &sync.Mutex{} | 13 | var mu = &sync.Mutex{} |
14 | var payloads []payloadBuff | 14 | var payloads []payloadBuff |
15 | 15 | ||
16 | type LangMap map[string]map[string]string | 16 | type LangMap map[string]map[string]string |
17 | 17 | ||
18 | type Field struct { | 18 | type Field struct { |
19 | Parameter string `json:"param"` | 19 | Parameter string `json:"param"` |
20 | Type string `json:"type"` | 20 | Type string `json:"type"` |
21 | Visible bool `json:"visible"` | 21 | Visible bool `json:"visible"` |
22 | Editable bool `json:"editable"` | 22 | Editable bool `json:"editable"` |
23 | } | 23 | } |
24 | 24 | ||
25 | type CorrelationField struct { | 25 | type CorrelationField struct { |
26 | Result string `json:"result"` | 26 | Result string `json:"result"` |
27 | Elements []string `json:"elements"` | 27 | Elements []string `json:"elements"` |
28 | Type string `json:"type"` | 28 | Type string `json:"type"` |
29 | } | 29 | } |
30 | 30 | ||
31 | type Translation struct { | 31 | type Translation struct { |
32 | Language string `json:"language"` | 32 | Language string `json:"language"` |
33 | FieldsLabels map[string]string `json:"fieldsLabels"` | 33 | FieldsLabels map[string]string `json:"fieldsLabels"` |
34 | } | 34 | } |
35 | 35 | ||
36 | type payloadBuff struct { | 36 | type payloadBuff struct { |
37 | Type string `json:"tableType"` | 37 | Type string `json:"tableType"` |
38 | Method string `json:"method"` | 38 | Method string `json:"method"` |
39 | Params map[string]string `json:"params"` | 39 | Params map[string]string `json:"params"` |
40 | Lang []Translation `json:"lang"` | 40 | Lang []Translation `json:"lang"` |
41 | Fields []Field `json:"fields"` | 41 | Fields []Field `json:"fields"` |
42 | Correlations []CorrelationField `json:"correlationFields"` | 42 | Correlations []CorrelationField `json:"correlationFields"` |
43 | IdField string `json:"idField"` | 43 | IdField string `json:"idField"` |
44 | 44 | ||
45 | // Data can only hold slices of any type. It can't be used for itteration | 45 | // Data can only hold slices of any type. It can't be used for itteration |
46 | Data interface{} `json:"data"` | 46 | Data interface{} `json:"data"` |
47 | } | 47 | } |
48 | 48 | ||
49 | type Payload struct { | 49 | type Payload struct { |
50 | Method string `json:"method"` | 50 | Method string `json:"method"` |
51 | Params map[string]string `json:"params"` | 51 | Params map[string]string `json:"params"` |
52 | Lang []Translation `json:"lang"` | 52 | Lang []Translation `json:"lang"` |
53 | Fields []Field `json:"fields"` | 53 | Fields []Field `json:"fields"` |
54 | Correlations []CorrelationField `json:"correlationFields"` | 54 | Correlations []CorrelationField `json:"correlationFields"` |
55 | IdField string `json:"idField"` | 55 | IdField string `json:"idField"` |
56 | 56 | ||
57 | // Data contains JSON payload. | 57 | // Data contains JSON payload. |
58 | // It can't be used for itteration | 58 | // It can't be used for itteration |
59 | Data interface{} `json:"data"` | 59 | Data interface{} `json:"data"` |
60 | } | 60 | } |
61 | 61 | ||
62 | // InitTables loads all payloads in the payloads variable. | 62 | // InitTables loads all payloads in the payloads variable. |
63 | // Returns an error if it fails. | 63 | // Returns an error if it fails. |
64 | func InitTables(db *ora.Ses, project string) error { | 64 | func InitTables(db *ora.Ses, project string) error { |
65 | jsonbuf, err := fetchJSON(db, project) | 65 | jsonbuf, err := fetchJSON(db, project) |
66 | if err != nil { | 66 | if err != nil { |
67 | return err | 67 | return err |
68 | } | 68 | } |
69 | 69 | ||
70 | mu.Lock() | 70 | mu.Lock() |
71 | defer mu.Unlock() | 71 | defer mu.Unlock() |
72 | json.Unmarshal(jsonbuf, &payloads) | 72 | json.Unmarshal(jsonbuf, &payloads) |
73 | if len(payloads) == 0 { | 73 | if len(payloads) == 0 { |
74 | return errors.New("tables config is corrupt") | 74 | return errors.New("tables config is corrupt") |
75 | } | 75 | } |
76 | return nil | 76 | return nil |
77 | } | 77 | } |
78 | 78 | ||
79 | // ReloadTables reloads all payloads in the payloads variable. | ||
80 | // Returns an error if it fails. | ||
81 | func ReloadTables(db *ora.Ses, project string) error { | ||
82 | payloads = make([]payloadBuff, 0) | ||
83 | return InitTables(db, project) | ||
84 | } | ||
85 | |||
79 | // DecodeJSON decodes JSON data from r to v. | 86 | // DecodeJSON decodes JSON data from r to v. |
80 | // Returns an error if it fails. | 87 | // Returns an error if it fails. |
81 | func DecodeJSON(r io.Reader, v interface{}) error { | 88 | func DecodeJSON(r io.Reader, v interface{}) error { |
82 | return json.NewDecoder(r).Decode(v) | 89 | return json.NewDecoder(r).Decode(v) |
83 | } | 90 | } |
84 | 91 | ||
85 | // NewPayload returs a payload sceleton for provided table. | 92 | // NewPayload returs a payload sceleton for provided table. |
86 | func NewPayload(r *http.Request, table string) Payload { | 93 | func NewPayload(r *http.Request, table string) Payload { |
87 | var pload Payload | 94 | var pload Payload |
88 | 95 | ||
89 | //pload.Method = r.Method + " " + r.URL.Path | 96 | //pload.Method = r.Method + " " + r.URL.Path |
90 | pload.Method = r.Method + " " + r.RequestURI | 97 | pload.Method = r.Method + " " + r.RequestURI |
91 | if table != "" { | 98 | if table != "" { |
92 | pload.Params = make(map[string]string, 0) | 99 | pload.Params = make(map[string]string, 0) |
93 | pload.Lang = translations(table) | 100 | pload.Lang = translations(table) |
94 | pload.Fields = fields(table) | 101 | pload.Fields = fields(table) |
95 | pload.IdField = id(table) | 102 | pload.IdField = id(table) |
96 | pload.Correlations = correlations(table) | 103 | pload.Correlations = correlations(table) |
97 | } | 104 | } |
98 | return pload | 105 | return pload |
99 | } | 106 | } |
100 | 107 | ||
101 | // DeliverPayload encodes payload to w. | 108 | // DeliverPayload encodes payload to w. |
102 | func DeliverPayload(w http.ResponseWriter, payload Payload) { | 109 | func DeliverPayload(w http.ResponseWriter, payload Payload) { |
103 | json.NewEncoder(w).Encode(payload) | 110 | json.NewEncoder(w).Encode(payload) |
104 | payload.Data = nil | 111 | payload.Data = nil |
105 | } | 112 | } |
106 | 113 | ||
107 | // translations returns a slice of translations for a payload/table of ptype type. | 114 | // translations returns a slice of translations for a payload/table of ptype type. |
108 | func translations(ptype string) []Translation { | 115 | func translations(ptype string) []Translation { |
109 | var translations []Translation | 116 | var translations []Translation |
110 | 117 | ||
111 | for _, pload := range payloads { | 118 | for _, pload := range payloads { |
112 | if pload.Type == ptype { | 119 | if pload.Type == ptype { |
113 | for _, t := range pload.Lang { | 120 | for _, t := range pload.Lang { |
114 | translations = append(translations, Translation{ | 121 | translations = append(translations, Translation{ |
115 | Language: t.Language, | 122 | Language: t.Language, |
116 | FieldsLabels: t.FieldsLabels, | 123 | FieldsLabels: t.FieldsLabels, |
117 | }) | 124 | }) |
118 | } | 125 | } |
119 | } | 126 | } |
120 | } | 127 | } |
121 | 128 | ||
122 | return translations | 129 | return translations |
123 | } | 130 | } |
124 | 131 | ||
125 | // fields returns a slice of fields for a payload/table of ptype type. | 132 | // fields returns a slice of fields for a payload/table of ptype type. |
126 | func fields(ptype string) []Field { | 133 | func fields(ptype string) []Field { |
127 | var fields []Field | 134 | var fields []Field |
128 | 135 | ||
129 | for _, pload := range payloads { | 136 | for _, pload := range payloads { |
130 | if pload.Type == ptype { | 137 | if pload.Type == ptype { |
131 | for _, f := range pload.Fields { | 138 | for _, f := range pload.Fields { |
132 | fields = append(fields, f) | 139 | fields = append(fields, f) |
133 | } | 140 | } |
134 | } | 141 | } |
135 | } | 142 | } |
136 | 143 | ||
137 | return fields | 144 | return fields |
138 | } | 145 | } |
139 | 146 | ||
140 | // id returns the name of ID field of a payload/table of ptype type. | 147 | // id returns the name of ID field of a payload/table of ptype type. |
141 | func id(ptype string) string { | 148 | func id(ptype string) string { |
142 | for _, pload := range payloads { | 149 | for _, pload := range payloads { |
143 | if pload.Type == ptype { | 150 | if pload.Type == ptype { |
144 | return pload.IdField | 151 | return pload.IdField |
145 | } | 152 | } |
146 | } | 153 | } |
147 | return "" | 154 | return "" |
148 | } | 155 | } |
149 | 156 | ||
150 | // correlations returns a slice of correlation fields for a payload/table of ptype type. | 157 | // correlations returns a slice of correlation fields for a payload/table of ptype type. |
151 | func correlations(ptype string) []CorrelationField { | 158 | func correlations(ptype string) []CorrelationField { |
152 | var corr []CorrelationField | 159 | var corr []CorrelationField |
153 | 160 | ||
154 | for _, pload := range payloads { | 161 | for _, pload := range payloads { |
155 | if pload.Type == ptype { | 162 | if pload.Type == ptype { |
156 | for _, c := range pload.Correlations { | 163 | for _, c := range pload.Correlations { |
157 | corr = append(corr, c) | 164 | corr = append(corr, c) |
158 | } | 165 | } |
159 | } | 166 | } |
160 | } | 167 | } |
161 | 168 | ||
162 | return corr | 169 | return corr |
163 | } | 170 | } |
164 | 171 | ||
165 | // fetchJSON returns a byte slice of JSON configuration file from TABLES_CONFIG table. | 172 | // fetchJSON returns a byte slice of JSON configuration file from TABLES_CONFIG table. |
166 | // Returns an error if it fails. | 173 | // Returns an error if it fails. |
167 | func fetchJSON(db *ora.Ses, project string) ([]byte, error) { | 174 | func fetchJSON(db *ora.Ses, project string) ([]byte, error) { |
168 | db.SetCfg(db.Cfg().SetClob(ora.S)) | 175 | db.SetCfg(db.Cfg().SetClob(ora.S)) |
169 | stmt, err := db.Prep(`SELECT JSON_NCLOB FROM TABLES_CONFIG WHERE PROJEKAT`+EqualQuotes(project), ora.S) | 176 | stmt, err := db.Prep(`SELECT JSON_NCLOB FROM TABLES_CONFIG WHERE PROJEKAT`+EqualQuotes(project), ora.S) |
170 | defer stmt.Close() | 177 | defer stmt.Close() |
171 | if err != nil { | 178 | if err != nil { |
172 | return nil, err | 179 | return nil, err |
173 | } | 180 | } |
174 | 181 | ||
175 | rset, err := stmt.Qry() | 182 | rset, err := stmt.Qry() |
176 | if err != nil { | 183 | if err != nil { |
177 | return nil, err | 184 | return nil, err |
178 | } | 185 | } |
179 | 186 | ||
180 | var data string | 187 | var data string |
181 | if rset.Next() { | 188 | if rset.Next() { |
182 | data = rset.Row[0].(string) | 189 | data = rset.Row[0].(string) |
183 | } | 190 | } |
184 | 191 | ||
185 | //fmt.Println(data) | 192 | //fmt.Println(data) |
186 | return []byte(data), nil | 193 | return []byte(data), nil |
187 | } | 194 | } |
188 | 195 |