summaryrefslogtreecommitdiff
path: root/models.go
blob: a8d24ade9c2b2ef6aa0c8af62f66024fed31ef46 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
package main

import (
	"database/sql"
	"github.com/jmoiron/sqlx"
	"time"
)

type sqlKey int

const (
	sqlLoadDecisions sqlKey = iota
	sqlLoadUnvotedDecisions
	sqlLoadDecisionByTag
	sqlLoadDecisionById
	sqlLoadVoteCountsForDecision
	sqlLoadVotesForDecision
	sqlLoadEnabledVoterByEmail
	sqlCountOlderThanDecision
	sqlCountOlderThanUnvotedDecision
	sqlCreateDecision
)

var sqlStatements = map[sqlKey]string{
	sqlLoadDecisions: `
SELECT decisions.id, decisions.tag, decisions.proponent,
       voters.name AS proposer, decisions.proposed, decisions.title,
       decisions.content, decisions.votetype, decisions.status, decisions.due,
       decisions.modified
FROM decisions
JOIN voters ON decisions.proponent=voters.id
ORDER BY proposed DESC
LIMIT 10 OFFSET 10 * $1`,
	sqlLoadUnvotedDecisions: `
SELECT decisions.id, decisions.tag, decisions.proponent,
       voters.name AS proposer, decisions.proposed, decisions.title,
       decisions.content, decisions.votetype, decisions.status, decisions.due,
       decisions.modified
FROM decisions
JOIN voters ON decisions.proponent=voters.id
WHERE decisions.status = 0 AND decisions.id NOT IN (
  SELECT votes.decision
  FROM votes
  WHERE votes.voter = $1)
ORDER BY proposed DESC
LIMIT 10 OFFSET 10 * $2;`,
	sqlLoadDecisionByTag: `
SELECT decisions.id, decisions.tag, decisions.proponent,
       voters.name AS proposer, decisions.proposed, decisions.title,
       decisions.content, decisions.votetype, decisions.status, decisions.due,
       decisions.modified
FROM decisions
JOIN voters ON decisions.proponent=voters.id
WHERE decisions.tag=$1;`,
	sqlLoadDecisionById: `
SELECT decisions.id, decisions.tag, decisions.proponent, decisions.proposed,
 	   decisions.title, decisions.content, decisions.votetype, decisions.status,
 	   decisions.due, decisions.modified
FROM decisions
WHERE decisions.id=$1;`,
	sqlLoadVoteCountsForDecision: `
SELECT vote, COUNT(vote)
FROM votes
WHERE decision=$1 GROUP BY vote`,
	sqlLoadVotesForDecision: `
SELECT votes.decision, votes.voter, voters.name, votes.vote, votes.voted, votes.notes
FROM votes
JOIN voters ON votes.voter=voters.id
WHERE decision=$1`,
	sqlLoadEnabledVoterByEmail: `
SELECT voters.id, voters.name, voters.enabled, voters.reminder
FROM voters
JOIN emails ON voters.id=emails.voter
WHERE emails.address=$1 AND voters.enabled=1`,
	sqlCountOlderThanDecision: `
SELECT COUNT(*) > 0 FROM decisions WHERE proposed < $1`,
	sqlCountOlderThanUnvotedDecision: `
SELECT COUNT(*) > 0 FROM decisions WHERE proposed < $1
   AND status=0
   AND id NOT IN (SELECT decision FROM votes WHERE votes.voter=$2)`,
	sqlCreateDecision: `
INSERT INTO decisions (
	proposed, proponent, title, content, votetype, status, due, modified,tag
) VALUES (
    :proposed, :proponent, :title, :content, :votetype, 0,
    :due,
    :proposed,
    'm' || strftime('%Y%m%d', :proposed) || '.' || (
	 	SELECT COUNT(*)+1 AS num
  		FROM decisions
  		WHERE proposed
  			BETWEEN date(:proposed) AND date(:proposed, '1 day')
    )
)`,
}

var db *sqlx.DB

func init() {
	for _, sqlStatement := range sqlStatements {
		var stmt *sqlx.Stmt
		stmt, err := db.Preparex(sqlStatement)
		if err != nil {
			logger.Fatalf("ERROR parsing statement %s: %s", sqlStatement, err)
		}
		stmt.Close()
	}
}

type VoteType uint8
type VoteStatus int8

type Decision struct {
	Id          int
	Proposed    time.Time
	ProponentId int `db:"proponent"`
	Title       string
	Content     string
	Quorum      int
	Majority    int
	Status      VoteStatus
	Due         time.Time
	Modified    time.Time
	Tag         string
	VoteType    VoteType
}

type Email struct {
	VoterId int `db:"voter"`
	Address string
}

type Voter struct {
	Id       int
	Name     string
	Enabled  bool
	Reminder string // reminder email address
}

type VoteChoice int

type Vote struct {
	DecisionId int `db:"decision"`
	VoterId    int `db:"voter"`
	Vote       VoteChoice
	Voted      time.Time
	Notes      string
}

const (
	voteAye     = 1
	voteNaye    = -1
	voteAbstain = 0
)

const (
	voteTypeMotion = 0
	voteTypeVeto   = 1
)

func (v VoteType) String() string {
	switch v {
	case voteTypeMotion:
		return "motion"
	case voteTypeVeto:
		return "veto"
	default:
		return "unknown"
	}
}

func (v VoteType) QuorumAndMajority() (int, int) {
	switch v {
	case voteTypeMotion:
		return 3, 50
	default:
		return 1, 99
	}
}

func (v VoteChoice) String() string {
	switch v {
	case voteAye:
		return "aye"
	case voteNaye:
		return "naye"
	case voteAbstain:
		return "abstain"
	default:
		return "unknown"
	}
}

const (
	voteStatusDeclined  = -1
	voteStatusPending   = 0
	voteStatusApproved  = 1
	voteStatusWithdrawn = -2
)

func (v VoteStatus) String() string {
	switch v {
	case voteStatusDeclined:
		return "declined"
	case voteStatusPending:
		return "pending"
	case voteStatusApproved:
		return "approved"
	case voteStatusWithdrawn:
		return "withdrawn"
	default:
		return "unknown"
	}
}

type VoteSums struct {
	Ayes     int
	Nayes    int
	Abstains int
}

func (v *VoteSums) VoteCount() int {
	return v.Ayes + v.Nayes + v.Abstains
}

type VoteForDisplay struct {
	Vote
	Name string
}

type DecisionForDisplay struct {
	Decision
	Proposer string `db:"proposer"`
	*VoteSums
	Votes []VoteForDisplay
}

func FindDecisionForDisplayByTag(tag string) (decision *DecisionForDisplay, err error) {
	decisionStmt, err := db.Preparex(sqlStatements[sqlLoadDecisionByTag])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer decisionStmt.Close()

	decision = &DecisionForDisplay{}
	if err = decisionStmt.Get(decision, tag); err != nil {
		if err == sql.ErrNoRows {
			decision = nil
			err = nil
		} else {
			logger.Printf("Error getting motion %s: %v\n", tag, err)
		}
	}
	decision.VoteSums, err = decision.Decision.VoteSums()
	return
}

// FindDecisionsForDisplayOnPage loads a set of decisions from the database.
//
// This function uses OFFSET for pagination which is not a good idea for larger data sets.
//
// TODO: migrate to timestamp base pagination
func FindDecisionsForDisplayOnPage(page int64, unvoted bool, voter *Voter) (decisions []*DecisionForDisplay, err error) {
	var decisionsStmt *sqlx.Stmt
	if unvoted && voter != nil {
		decisionsStmt, err = db.Preparex(sqlStatements[sqlLoadUnvotedDecisions])
	} else {
		decisionsStmt, err = db.Preparex(sqlStatements[sqlLoadDecisions])
	}
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer decisionsStmt.Close()

	var rows *sqlx.Rows
	if unvoted && voter != nil {
		rows, err = decisionsStmt.Queryx(voter.Id, page-1)
	} else {
		rows, err = decisionsStmt.Queryx(page - 1)
	}
	if err != nil {
		logger.Printf("Error loading motions for page %d: %v\n", page, err)
		return
	}
	defer rows.Close()

	for rows.Next() {
		var d DecisionForDisplay
		if err = rows.StructScan(&d); err != nil {
			logger.Printf("Error loading motions for page %d: %v\n", page, err)
			return
		}
		d.VoteSums, err = d.Decision.VoteSums()
		if err != nil {
			return
		}
		decisions = append(decisions, &d)
	}
	return
}

func (d *Decision) VoteSums() (sums *VoteSums, err error) {
	votesStmt, err := db.Preparex(sqlStatements[sqlLoadVoteCountsForDecision])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer votesStmt.Close()

	voteRows, err := votesStmt.Queryx(d.Id)
	if err != nil {
		logger.Printf("Error fetching vote sums for motion %s: %v\n", d.Tag, err)
		return
	}
	defer voteRows.Close()

	sums = &VoteSums{}
	for voteRows.Next() {
		var vote VoteChoice
		var count int
		if err = voteRows.Scan(&vote, &count); err != nil {
			logger.Printf("Error fetching vote sums for motion %s: %v\n", d.Tag, err)
			return
		}
		switch vote {
		case voteAye:
			sums.Ayes = count
		case voteNaye:
			sums.Nayes = count
		case voteAbstain:
			sums.Abstains = count
		}
	}
	return
}

func (d *DecisionForDisplay) LoadVotes() (err error) {
	votesStmt, err := db.Preparex(sqlStatements[sqlLoadVotesForDecision])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer votesStmt.Close()
	err = votesStmt.Select(&d.Votes, d.Id)
	if err != nil {
		logger.Printf("Error selecting votes for motion %s: %v\n", d.Tag, err)
	}
	return
}

func (d *Decision) OlderExists(unvoted bool, voter *Voter) (result bool, err error) {
	var olderStmt *sqlx.Stmt
	if unvoted && voter != nil {
		olderStmt, err = db.Preparex(sqlStatements[sqlCountOlderThanUnvotedDecision])
	} else {
		olderStmt, err = db.Preparex(sqlStatements[sqlCountOlderThanDecision])
	}
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer olderStmt.Close()

	if unvoted && voter != nil {
		if err = olderStmt.Get(&result, d.Proposed, voter.Id); err != nil {
			logger.Printf("Error finding older motions than %s: %v\n", d.Tag, err)
		}
	} else {
		if err = olderStmt.Get(&result, d.Proposed); err != nil {
			logger.Printf("Error finding older motions than %s: %v\n", d.Tag, err)
		}
	}

	return
}

func (d *Decision) Save() (err error) {
	insertDecisionStmt, err := db.PrepareNamed(sqlStatements[sqlCreateDecision])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer insertDecisionStmt.Close()

	result, err := insertDecisionStmt.Exec(d)
	if err != nil {
		logger.Println("Error creating motion:", err)
		return
	}

	lastInsertId, err := result.LastInsertId()
	if err != nil {
		logger.Println("Error getting id of inserted motion:", err)
	}
	logger.Println("DEBUG new motion has id", lastInsertId)

	getDecisionStmt, err := db.Preparex(sqlStatements[sqlLoadDecisionById])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer getDecisionStmt.Close()

	err = getDecisionStmt.Get(d, lastInsertId)
	if err != nil {
		logger.Println("Error getting inserted motion:", err)
	}

	return
}

func FindVoterByAddress(emailAddress string) (voter *Voter, err error) {
	findVoterStmt, err := db.Preparex(sqlStatements[sqlLoadEnabledVoterByEmail])
	if err != nil {
		logger.Println("Error preparing statement:", err)
		return
	}
	defer findVoterStmt.Close()

	voter = &Voter{}
	if err = findVoterStmt.Get(voter, emailAddress); err != nil {
		if err != sql.ErrNoRows {
			logger.Printf("Error getting voter for address %s: %v\n", emailAddress, err)
		} else {
			err = nil
			voter = nil
		}
	}
	return
}