Merge pull request #4640 from MaximilianKrambach/pollCalculations

Poll calculations

client/src/app/shared/models/assignments/assignment-poll-option.ts

@@ -1,6 +1,11 @@
 import { Deserializer } from '../base/deserializer';
 import { PollVoteValue } from 'app/core/ui-services/poll.service';
 
+export interface AssignmentOptionVote {
+    weight: number;
+    value: PollVoteValue;
+}
+
 /**
  * Representation of a poll option
  *
@@ -11,10 +16,7 @@ export class AssignmentPollOption extends Deserializer {
     public id: number; // The AssignmentUser id of the candidate
     public candidate_id: number; // the User id of the candidate
     public is_elected: boolean;
-    public votes: {
+    public votes: AssignmentOptionVote[];
-        weight: number; // represented as a string because it's a decimal field
-        value: PollVoteValue;
-    }[];
     public poll_id: number;
     public weight: number; // weight to order the display
 

client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts

@@ -98,11 +98,6 @@ export class AssignmentDetailComponent extends BaseViewComponent implements OnIn
         this._assignment = assignment;
 
         this.filterCandidates();
-        if (this.assignment.polls.length) {
-            this.assignment.polls.forEach(poll => {
-                poll.pollBase = this.pollService.getBaseAmount(poll);
-            });
-        }
     }
 
     /**

client/src/app/site/assignments/components/assignment-poll/assignment-poll.component.ts

@@ -7,10 +7,9 @@ import { TranslateService } from '@ngx-translate/core';
 
 import { AssignmentPoll } from 'app/shared/models/assignments/assignment-poll';
 import { AssignmentPollDialogComponent } from '../assignment-poll-dialog/assignment-poll-dialog.component';
-import { AssignmentPollService, AssignmentPercentBase } from '../../services/assignment-poll.service';
+import { AssignmentPollService } from '../../services/assignment-poll.service';
 import { AssignmentRepositoryService } from 'app/core/repositories/assignments/assignment-repository.service';
 import { BaseViewComponent } from 'app/site/base/base-view';
-import { ConfigService } from 'app/core/ui-services/config.service';
 import { MajorityMethod, CalculablePollKey } from 'app/core/ui-services/poll.service';
 import { OperatorService } from 'app/core/core-services/operator.service';
 import { PromptService } from 'app/core/ui-services/prompt.service';
@@ -132,8 +131,7 @@ export class AssignmentPollComponent extends BaseViewComponent implements OnInit
         public translate: TranslateService,
         public dialog: MatDialog,
         private promptService: PromptService,
-        private formBuilder: FormBuilder,
+        private formBuilder: FormBuilder
-        private config: ConfigService
     ) {
         super(titleService, translate, matSnackBar);
     }
@@ -148,13 +146,6 @@ export class AssignmentPollComponent extends BaseViewComponent implements OnInit
         this.descriptionForm = this.formBuilder.group({
             description: this.poll ? this.poll.description : ''
         });
-        this.subscriptions.push(
-            this.config.get<AssignmentPercentBase>('assignments_poll_100_percent_base').subscribe(() => {
-                if (this.poll) {
-                    this.poll.pollBase = this.pollService.getBaseAmount(this.poll);
-                }
-            })
-        );
     }
 
     /**
@@ -188,7 +179,11 @@ export class AssignmentPollComponent extends BaseViewComponent implements OnInit
     public quorumReached(option: ViewAssignmentPollOption): boolean {
         const yesValue = this.poll.pollmethod === 'votes' ? 'Votes' : 'Yes';
         const amount = option.votes.find(v => v.value === yesValue).weight;
-        const yesQuorum = this.pollService.yesQuorum(this.majorityChoice, this.poll, option);
+        const yesQuorum = this.pollService.yesQuorum(
+            this.majorityChoice,
+            this.pollService.calculationDataFromPoll(this.poll),
+            option
+        );
         return yesQuorum && amount >= yesQuorum;
     }
 
@@ -263,7 +258,11 @@ export class AssignmentPollComponent extends BaseViewComponent implements OnInit
      */
     public getQuorumReachedString(option: ViewAssignmentPollOption): string {
         const name = this.translate.instant(this.majorityChoice.display_name);
-        const quorum = this.pollService.yesQuorum(this.majorityChoice, this.poll, option);
+        const quorum = this.pollService.yesQuorum(
+            this.majorityChoice,
+            this.pollService.calculationDataFromPoll(this.poll),
+            option
+        );
         const isReached = this.quorumReached(option)
             ? this.translate.instant('reached')
             : this.translate.instant('not reached');

client/src/app/site/assignments/models/view-assignment-poll-option.ts

@@ -1,9 +1,9 @@
-import { ViewUser } from 'app/site/users/models/view-user';
+import { AssignmentPollOption, AssignmentOptionVote } from 'app/shared/models/assignments/assignment-poll-option';
 import { BaseViewModel } from 'app/site/base/base-view-model';
-import { Updateable } from 'app/site/base/updateable';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { PollVoteValue } from 'app/core/ui-services/poll.service';
-import { AssignmentPollOption } from 'app/shared/models/assignments/assignment-poll-option';
+import { Updateable } from 'app/site/base/updateable';
+import { ViewUser } from 'app/site/users/models/view-user';
 
 /**
  * Defines the order the option's votes are sorted in (server might send raw data in any order)
@@ -40,10 +40,7 @@ export class ViewAssignmentPollOption implements Identifiable, Updateable {
         return this.option.is_elected;
     }
 
-    public get votes(): {
+    public get votes(): AssignmentOptionVote[] {
-        weight: number;
-        value: PollVoteValue;
-    }[] {
         return this.option.votes.sort((a, b) => votesOrder.indexOf(a.value) - votesOrder.indexOf(b.value));
     }
 

client/src/app/site/assignments/models/view-assignment-poll.ts

@@ -78,13 +78,6 @@ export class ViewAssignmentPoll implements Identifiable, Updateable, Projectable
         return this.poll.assignment_id;
     }
 
-    /**
-     * storing the base values for percentage calculations,
-     * to avoid recalculating pollBases too often
-     * (the calculation iterates through all pollOptions in some use cases)
-     */
-    public pollBase: number;
-
     public constructor(assignmentPoll: AssignmentPoll, assignmentPollOptions: ViewAssignmentPollOption[]) {
         this._assignmentPoll = assignmentPoll;
         this._assignmentPollOptions = assignmentPollOptions;

client/src/app/site/assignments/services/assignment-pdf.service.ts

@@ -243,8 +243,11 @@ export class AssignmentPdfService {
                     const conclusionLabel = this.translate.instant(this.pollService.getLabel(key));
                     const specialLabel = this.translate.instant(this.pollService.getSpecialLabel(poll[key]));
                     let percentLabel = '';
-                    if (!this.pollService.isAbstractValue(poll, key)) {
+                    if (!this.pollService.isAbstractValue(this.pollService.calculationDataFromPoll(poll), key)) {
-                        percentLabel = ` (${this.pollService.getValuePercent(poll, key)}%)`;
+                        percentLabel = ` (${this.pollService.getValuePercent(
+                            this.pollService.calculationDataFromPoll(poll),
+                            key
+                        )}%)`;
                     }
                     return [
                         {
@@ -302,10 +305,17 @@ export class AssignmentPdfService {
         let resultString = '';
         const label = this.translate.instant(this.pollService.getLabel(optionLabel));
         const valueString = this.pollService.getSpecialLabel(value);
-        const percentNr = this.pollService.getPercent(poll, pollOption, optionLabel);
+        const percentNr = this.pollService.getPercent(
+            this.pollService.calculationDataFromPoll(poll),
+            pollOption,
+            optionLabel
+        );
 
         resultString += `${label} ${valueString}`;
-        if (percentNr && !this.pollService.isAbstractOption(poll, pollOption, optionLabel)) {
+        if (
+            percentNr &&
+            !this.pollService.isAbstractOption(this.pollService.calculationDataFromPoll(poll), pollOption, optionLabel)
+        ) {
             resultString += ` (${percentNr}%)`;
         }
 

client/src/app/site/assignments/services/assignment-poll.service.ts

@@ -1,5 +1,6 @@
 import { Injectable } from '@angular/core';
 
+import { AssignmentOptionVote } from 'app/shared/models/assignments/assignment-poll-option';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import {
     PollService,
@@ -15,6 +16,28 @@ type AssignmentPollValues = 'auto' | 'votes' | 'yesnoabstain' | 'yesno';
 export type AssignmentPollMethod = 'yn' | 'yna' | 'votes';
 export type AssignmentPercentBase = 'YES_NO_ABSTAIN' | 'YES_NO' | 'VALID' | 'CAST' | 'DISABLED';
 
+/**
+ * interface common to data in a ViewAssignmentPoll and PollSlideData
+ *
+ * TODO: simplify
+ */
+export interface CalculationData {
+    pollMethod: AssignmentPollMethod;
+    votesno: number;
+    votesabstain: number;
+    votescast: number;
+    votesvalid: number;
+    votesinvalid: number;
+    percentBase?: AssignmentPercentBase;
+    pollOptions?: {
+        votes: AssignmentOptionVote[];
+    }[];
+}
+
+interface CalculationOption {
+    votes: AssignmentOptionVote[];
+}
+
 /**
  * Vote entries included once for summary (e.g. total votes cast)
  */
@@ -75,17 +98,18 @@ export class AssignmentPollService extends PollService {
      * Get the base amount for the 100% calculations. Note that some poll methods
      * (e.g. yes/no/abstain may have a different percentage base and will return null here)
      *
-     * @param poll
+     * @param data
      * @returns The amount of votes indicating the 100% base
      */
-    public getBaseAmount(poll: ViewAssignmentPoll): number | null {
+    public getBaseAmount(data: CalculationData): number | null {
-        switch (this.percentBase) {
+        const percentBase = data.percentBase || this.percentBase;
+        switch (percentBase) {
             case 'DISABLED':
                 return null;
             case 'YES_NO':
             case 'YES_NO_ABSTAIN':
-                if (poll.pollmethod === 'votes') {
+                if (data.pollMethod === 'votes') {
-                    const yes = poll.options.map(option => {
+                    const yes = data.pollOptions.map(option => {
                         const yesValue = option.votes.find(v => v.value === 'Votes');
                         return yesValue ? yesValue.weight : -99;
                     });
@@ -99,9 +123,9 @@ export class AssignmentPollService extends PollService {
                     return null;
                 }
             case 'CAST':
-                return poll.votescast > 0 && poll.votesinvalid >= 0 ? poll.votescast : null;
+                return data.votescast > 0 && data.votesinvalid >= 0 ? data.votescast : null;
             case 'VALID':
-                return poll.votesvalid > 0 ? poll.votesvalid : null;
+                return data.votesvalid > 0 ? data.votesvalid : null;
             default:
                 return null;
         }
@@ -111,25 +135,25 @@ export class AssignmentPollService extends PollService {
      * Get the percentage for an option
      *
      * @param poll
-     * @param option
+     * @param data
-     * @param value
      * @returns a percentage number with two digits, null if the value cannot be calculated
      */
-    public getPercent(poll: ViewAssignmentPoll, option: ViewAssignmentPollOption, value: PollVoteValue): number | null {
+    public getPercent(data: CalculationData, option: CalculationOption, key: PollVoteValue): number | null {
+        const percentBase = data.percentBase || this.percentBase;
         let base = 0;
-        if (this.percentBase === 'DISABLED') {
+        if (percentBase === 'DISABLED') {
             return null;
-        } else if (this.percentBase === 'VALID') {
+        } else if (percentBase === 'VALID') {
-            base = poll.votesvalid;
+            base = data.votesvalid;
-        } else if (this.percentBase === 'CAST') {
+        } else if (percentBase === 'CAST') {
-            base = poll.votescast;
+            base = data.votescast;
         } else {
-            base = poll.pollmethod === 'votes' ? poll.pollBase : this.getOptionBaseAmount(poll, option);
+            base = data.pollMethod === 'votes' ? this.getBaseAmount(data) : this.getOptionBaseAmount(data, option);
         }
         if (!base || base < 0) {
             return null;
         }
-        const vote = option.votes.find(v => v.value === value);
+        const vote = option.votes.find(v => v.value === key);
         if (!vote) {
             return null;
         }
@@ -140,39 +164,53 @@ export class AssignmentPollService extends PollService {
      * get the percentage for a non-abstract per-poll value
      * TODO: similar code to getPercent. Mergeable?
      *
-     * @param poll the poll this value refers to
+     * @param data
      * @param value a per-poll value (e.g. 'votesvalid')
      * @returns a percentage number with two digits, null if the value cannot be calculated
      */
-    public getValuePercent(poll: ViewAssignmentPoll, value: CalculablePollKey): number | null {
+    public getValuePercent(data: CalculationData, value: CalculablePollKey): number | null {
-        if (!poll.pollBase) {
+        const percentBase = data.percentBase || this.percentBase;
+        switch (percentBase) {
+            case 'YES_NO':
+            case 'YES_NO_ABSTAIN':
+            case 'DISABLED':
+                return null;
+            case 'VALID':
+                if (value === 'votesinvalid' || value === 'votescast') {
                     return null;
                 }
-        const amount = poll[value];
+                break;
+        }
+        const baseAmount = this.getBaseAmount(data);
+        if (!baseAmount) {
+            return null;
+        }
+        const amount = data[value];
         if (amount === undefined || amount < 0) {
             return null;
         }
-        return Math.round(((amount * 100) / poll.pollBase) * 100) / 100;
+        return Math.round(((amount * 100) / baseAmount) * 100) / 100;
     }
 
     /**
      * Check if the option in a poll is abstract (percentages should not be calculated)
      *
-     * @param poll
+     * @param data
      * @param option
      * @param key (optional) the key to calculate
      * @returns true if the poll has no percentages, the poll option is a special value,
      * or if the calculations are disabled in the config
      */
-    public isAbstractOption(poll: ViewAssignmentPoll, option: ViewAssignmentPollOption, key?: PollVoteValue): boolean {
+    public isAbstractOption(data: CalculationData, option: ViewAssignmentPollOption, key?: PollVoteValue): boolean {
-        if (this.percentBase === 'DISABLED' || !option.votes || !option.votes.length) {
+        const percentBase = data.percentBase || this.percentBase;
+        if (percentBase === 'DISABLED' || !option.votes || !option.votes.length) {
             return true;
         }
-        if (key === 'Abstain' && this.percentBase === 'YES_NO') {
+        if (key === 'Abstain' && percentBase === 'YES_NO') {
             return true;
         }
-        if (poll.pollmethod === 'votes') {
+        if (data.pollMethod === 'votes') {
-            return poll.pollBase ? false : true;
+            return this.getBaseAmount(data) > 0 ? false : true;
         } else {
             return option.votes.some(v => v.weight < 0);
         }
@@ -182,19 +220,20 @@ export class AssignmentPollService extends PollService {
      * Check for abstract (not usable as percentage) options in non-option
      * 'meta' values
      *
-     * @param poll
+     * @param data
      * @param value
      * @returns true if percentages cannot be calculated
      * TODO: Yes, No, etc. in an option will always return true.
      * Use {@link isAbstractOption} for these
      */
-    public isAbstractValue(poll: ViewAssignmentPoll, value: CalculablePollKey): boolean {
+    public isAbstractValue(data: CalculationData, value: CalculablePollKey): boolean {
-        if (this.percentBase === 'DISABLED' || !poll.pollBase || !this.pollValues.includes(value)) {
+        const percentBase = data.percentBase || this.percentBase;
+        if (percentBase === 'DISABLED' || !this.getBaseAmount(data) || !this.pollValues.includes(value)) {
             return true;
         }
-        if (this.percentBase === 'CAST' && poll[value] >= 0) {
+        if (percentBase === 'CAST' && data[value] >= 0) {
             return false;
-        } else if (this.percentBase === 'VALID' && value === 'votesvalid' && poll[value] > 0) {
+        } else if (percentBase === 'VALID' && value === 'votesvalid' && data[value] > 0) {
             return false;
         }
         return true;
@@ -203,24 +242,27 @@ export class AssignmentPollService extends PollService {
     /**
      * Calculate the base amount inside an option. Only useful if poll method is not 'votes'
      *
+     * @param data
+     * @param option
      * @returns an positive integer to be used as percentage base, or null
      */
-    private getOptionBaseAmount(poll: ViewAssignmentPoll, option: ViewAssignmentPollOption): number | null {
+    private getOptionBaseAmount(data: CalculationData, option: CalculationOption): number | null {
-        if (this.percentBase === 'DISABLED' || poll.pollmethod === 'votes') {
+        const percentBase = data.percentBase || this.percentBase;
+        if (percentBase === 'DISABLED' || data.pollMethod === 'votes') {
             return null;
-        } else if (this.percentBase === 'CAST') {
+        } else if (percentBase === 'CAST') {
-            return poll.votescast > 0 ? poll.votescast : null;
+            return data.votescast > 0 ? data.votescast : null;
-        } else if (this.percentBase === 'VALID') {
+        } else if (percentBase === 'VALID') {
-            return poll.votesvalid > 0 ? poll.votesvalid : null;
+            return data.votesvalid > 0 ? data.votesvalid : null;
         }
         const yes = option.votes.find(v => v.value === 'Yes');
         const no = option.votes.find(v => v.value === 'No');
-        if (this.percentBase === 'YES_NO') {
+        if (percentBase === 'YES_NO') {
             if (!yes || yes.weight === undefined || !no || no.weight === undefined) {
                 return null;
             }
             return yes.weight >= 0 && no.weight >= 0 ? yes.weight + no.weight : null;
-        } else if (this.percentBase === 'YES_NO_ABSTAIN') {
+        } else if (percentBase === 'YES_NO_ABSTAIN') {
             const abstain = option.votes.find(v => v.value === 'Abstain');
             if (!abstain || abstain.weight === undefined) {
                 return null;
@@ -235,16 +277,32 @@ export class AssignmentPollService extends PollService {
      * Get the minimum amount of votes needed for an option to pass the quorum
      *
      * @param method
-     * @param poll
+     * @param data
      * @param option
      * @returns a positive integer number; may return null if quorum is not calculable
      */
-    public yesQuorum(
+    public yesQuorum(method: MajorityMethod, data: CalculationData, option: ViewAssignmentPollOption): number | null {
-        method: MajorityMethod,
+        const baseAmount =
-        poll: ViewAssignmentPoll,
+            data.pollMethod === 'votes' ? this.getBaseAmount(data) : this.getOptionBaseAmount(data, option);
-        option: ViewAssignmentPollOption
-    ): number | null {
-        const baseAmount = poll.pollmethod === 'votes' ? poll.pollBase : this.getOptionBaseAmount(poll, option);
         return method.calc(baseAmount);
     }
+
+    /**
+     * helper function to tuirn a Poll into calculation data for this service
+     * TODO: temp until better method to normalize Poll ans PollSlideData is implemented
+     *
+     * @param poll
+     * @returns calculationData ready to be used
+     */
+    public calculationDataFromPoll(poll: ViewAssignmentPoll): CalculationData {
+        return {
+            pollMethod: poll.pollmethod,
+            votesno: poll.votesno,
+            votesabstain: poll.votesabstain,
+            votescast: poll.votescast,
+            votesinvalid: poll.votesinvalid,
+            votesvalid: poll.votesvalid,
+            pollOptions: poll.options
+        };
+    }
 }

client/src/app/slides/assignments/poll/poll-slide-data.ts

@@ -5,9 +5,8 @@ export interface PollSlideOption {
     user: string;
     is_elected: boolean;
     votes: {
-        weight: PollVoteValue;
+        weight: string;
-        value: string;
+        value: PollVoteValue;
-        percent?: string;
     }[];
 }
 

client/src/app/slides/assignments/poll/poll-slide.component.html

@@ -24,39 +24,18 @@
                     </div>
                     <div class="option-percents">
                         <div *ngFor="let vote of option.votes" class="bold">
-                            <span *ngIf="vote.value !== 'Votes'">{{ vote.value | translate }}:</span>
+                            <span *ngIf="vote.value !== 'Votes'">{{ getLabel(vote.value) }}:</span>
-                            <span>
+                            <span> {{ getVotePercent(vote.value, option) }}</span>
-                                {{ labelValue(vote.weight) | translate }}
-                            </span>
-                            <span *ngIf="vote.percent">
-                                ({{ vote.percent }})
-                            </span>
                         </div>
                     </div>
                 </div>
             </div>
-            <div *ngIf="data.data.poll.votesvalid !== null" class="row">
+            <div *ngFor="let value of pollValues" class="row">
                 <div class="option-name grey">
-                    <span translate>Valid votes</span>
+                    <span>{{ getLabel(value) }}</span>
                 </div>
                 <div class="option-percents grey">
-                    {{ labelValue(data.data.poll.votesvalid) | translate }}
+                    {{ getPollPercent(value) }}
-                </div>
-            </div>
-            <div *ngIf="data.data.poll.votesinvalid !== null" class="row">
-                <div class="option-name grey">
-                    <span translate>Invalid votes</span>
-                </div>
-                <div class="option-percents grey">
-                    {{ labelValue(data.data.poll.votesinvalid) | translate }}
-                </div>
-            </div>
-            <div *ngIf="data.data.poll.votescast !== null" class="row">
-                <div class="option-name grey">
-                    <span translate>Total votes cast</span>
-                </div>
-                <div class="option-percents grey">
-                    {{ labelValue(data.data.poll.votescast) | translate }}
                 </div>
             </div>
         </div>

client/src/app/slides/assignments/poll/poll-slide.component.ts

@@ -1,9 +1,15 @@
 import { Component, Input } from '@angular/core';
 
-import { AssignmentPollService, SummaryPollKey } from 'app/site/assignments/services/assignment-poll.service';
+import {
+    AssignmentPollService,
+    CalculationData,
+    SummaryPollKey
+} from 'app/site/assignments/services/assignment-poll.service';
 import { BaseSlideComponent } from 'app/slides/base-slide-component';
-import { PollSlideData } from './poll-slide-data';
+import { PollSlideData, PollSlideOption } from './poll-slide-data';
+import { PollVoteValue, CalculablePollKey } from 'app/core/ui-services/poll.service';
 import { SlideData } from 'app/core/core-services/projector-data.service';
+import { TranslateService } from '@ngx-translate/core';
 
 @Component({
     selector: 'os-poll-slide',
@@ -13,85 +19,78 @@ import { SlideData } from 'app/core/core-services/projector-data.service';
 export class PollSlideComponent extends BaseSlideComponent<PollSlideData> {
     private _data: SlideData<PollSlideData>;
 
-    public pollValues: SummaryPollKey[] = ['votesno', 'votesabstain', 'votesvalid', 'votesinvalid', 'votescast'];
+    private calculationData: CalculationData;
+
+    public get pollValues(): SummaryPollKey[] {
+        if (!this.data) {
+            return [];
+        }
+        const values: SummaryPollKey[] = ['votesno', 'votesabstain', 'votesvalid', 'votesinvalid', 'votescast'];
+        return values.filter(val => this.data.data.poll[val] !== null);
+    }
 
     @Input()
     public set data(data: SlideData<PollSlideData>) {
         this._data = data;
-        this.setPercents();
+        this.calculationData = {
+            pollMethod: data.data.poll.pollmethod,
+            votesno: parseFloat(data.data.poll.votesno),
+            votesabstain: parseFloat(data.data.poll.votesabstain),
+            votescast: parseFloat(data.data.poll.votescast),
+            votesvalid: parseFloat(data.data.poll.votesvalid),
+            votesinvalid: parseFloat(data.data.poll.votesinvalid),
+            pollOptions: data.data.poll.options.map(opt => {
+                return {
+                    votes: opt.votes.map(vote => {
+                        return {
+                            weight: parseFloat(vote.weight),
+                            value: vote.value
+                        };
+                    })
+                };
+            }),
+            percentBase: data.data.assignments_poll_100_percent_base
+        };
     }
 
     public get data(): SlideData<PollSlideData> {
         return this._data;
     }
 
-    public constructor(private pollService: AssignmentPollService) {
+    public constructor(private pollService: AssignmentPollService, private translate: TranslateService) {
         super();
     }
 
-    public getVoteString(rawValue: string): string {
+    /**
-        const num = parseFloat(rawValue);
+     * get a vote's numerical or special label, including percent values if these are to
-        if (!isNaN(num)) {
+     * be displayed
-            return this.pollService.getSpecialLabel(num);
+     *
-        }
+     * @param key
-        return '-';
+     * @param option
+     */
+    public getVotePercent(key: PollVoteValue, option: PollSlideOption): string {
+        const calcOption = {
+            votes: option.votes.map(vote => {
+                return { weight: parseFloat(vote.weight), value: vote.value };
+            })
+        };
+        const percent = this.pollService.getPercent(this.calculationData, calcOption, key);
+        const number = this.translate.instant(
+            this.pollService.getSpecialLabel(parseFloat(option.votes.find(v => v.value === key).weight))
+        );
+        return percent === null ? number : `${number} (${percent}%)`;
     }
 
-    private setPercents(): void {
+    public getPollPercent(key: CalculablePollKey): string {
-        if (
+        const percent = this.pollService.getValuePercent(this.calculationData, key);
-            this.data.data.assignments_poll_100_percent_base === 'DISABLED' ||
+        const number = this.translate.instant(this.pollService.getSpecialLabel(this.calculationData[key]));
-            !this.data.data.poll.has_votes ||
+        return percent === null ? number : `${number} (${percent}%)`;
-            !this.data.data.poll.options.length
-        ) {
-            return;
-        }
-        for (const option of this.data.data.poll.options) {
-            for (const vote of option.votes) {
-                const voteweight = parseFloat(vote.weight);
-                if (isNaN(voteweight) || voteweight < 0) {
-                    return;
-                }
-                let base: number;
-                switch (this.data.data.assignments_poll_100_percent_base) {
-                    case 'CAST':
-                        base = this.data.data.poll.votescast ? parseFloat(this.data.data.poll.votescast) : 0;
-                        break;
-                    case 'VALID':
-                        base = this.data.data.poll.votesvalid ? parseFloat(this.data.data.poll.votesvalid) : 0;
-                        break;
-                    case 'YES_NO':
-                    case 'YES_NO_ABSTAIN':
-                        const yesOption = option.votes.find(v => v.value === 'Yes');
-                        const yes = yesOption ? parseFloat(yesOption.weight) : -1;
-                        const noOption = option.votes.find(v => v.value === 'No');
-                        const no = noOption ? parseFloat(noOption.weight) : -1;
-                        const absOption = option.votes.find(v => v.value === 'Abstain');
-                        const abs = absOption ? parseFloat(absOption.weight) : -1;
-                        if (this.data.data.assignments_poll_100_percent_base === 'YES_NO_ABSTAIN') {
-                            base = yes >= 0 && no >= 0 && abs >= 0 ? yes + no + abs : 0;
-                        } else {
-                            if (vote.value !== 'Abstain') {
-                                base = yes >= 0 && no >= 0 ? yes + no : 0;
-                            }
-                        }
-                        break;
-                    default:
-                        break;
-                }
-                if (base) {
-                    vote.percent = `${Math.round(((parseFloat(vote.weight) * 100) / base) * 100) / 100}%`;
-                }
-            }
-        }
     }
 
     /**
-     * Converts a number-like string to a simpler, more readable version
+     * @returns a translated label for a key
-     *
-     * @param input a server-sent string representing a numerical value
-     * @returns either the special label or a cleaned-up number of the inpu string
      */
-    public labelValue(input: string): string {
+    public getLabel(key: CalculablePollKey): string {
-        return this.pollService.getSpecialLabel(parseFloat(input));
+        return this.translate.instant(this.pollService.getLabel(key));
     }
 }