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147 changes: 147 additions & 0 deletions
147
e2xgrader/nbextensions/src/common/extra_cells/extended_cell/attachment.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| define([], function() { | ||
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| class Observable { | ||
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| constructor() { | ||
| this.observers = []; | ||
| } | ||
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| registerObserver(observer) { | ||
| this.observers.push(observer); | ||
| } | ||
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| notifyAll(event) { | ||
| this.observers.forEach(observer => observer.notify(event)); | ||
| } | ||
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| } | ||
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| class AttachmentModel extends Observable { | ||
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| constructor(cell) { | ||
| super(); | ||
| this.ids = {}; | ||
| this.cell = cell; | ||
| this.typePattern = /data:([^;]*)/; | ||
| this.imagePattern = /!\[[^\(]+\]\(attachment:[^)]+\)/g; | ||
| this.infoPattern = /\n### You uploaded \d+ attachments.\n\n/g; | ||
| this.attachments = {}; | ||
| this.load(); | ||
| } | ||
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| load() { | ||
| let that = this; | ||
| this.id = 0; | ||
| Object.assign(this.attachments, this.cell.attachments); | ||
| Object.keys(this.attachments).forEach(function(key) { | ||
| that.id += 1; | ||
| that.ids[key] = that.id; | ||
| }); | ||
| } | ||
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| save() { | ||
| if (this.attachments !== undefined) { | ||
| this.cell.attachments = this.attachments; | ||
| console.log('Saved attachments.'); | ||
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| } else { | ||
| console.log('Attachments not defined.'); | ||
| } | ||
| this.postSaveHook(); | ||
| } | ||
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| postSaveHook() { | ||
| // Invoked after attachments are saved | ||
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| } | ||
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| hasAttachment(key) { | ||
| return key in this.attachments; | ||
| } | ||
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| getAttachment(key) { | ||
| return { | ||
| id: this.ids[key], | ||
| name: key, | ||
| type: Object.keys(this.attachments[key])[0], | ||
| data: Object.values(this.attachments[key])[0] | ||
| } | ||
| } | ||
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| setAttachment(key, dataUrl) { | ||
| let type = this.typePattern.exec(dataUrl)[1]; | ||
| let data = dataUrl.replace('data:' + type + ';base64,', ''); | ||
| this.id += 1; | ||
| this.attachments[key] = {}; | ||
| this.attachments[key][type] = data; | ||
| this.ids[key] = this.id; | ||
| this.notifyAll({ | ||
| type: 'add', | ||
| key: key, | ||
| id: this.ids[key] | ||
| }); | ||
| this.save(); | ||
| } | ||
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| removeAttachment(key) { | ||
| let id = this.ids[key]; | ||
| delete this.attachments[key]; | ||
| delete this.ids[key]; | ||
| this.notifyAll({ | ||
| type: 'delete', | ||
| key: key, | ||
| id: id | ||
| }); | ||
| this.save(); | ||
| } | ||
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| getAttachments() { | ||
| let that = this; | ||
| let attachments = []; | ||
| Object.keys(this.attachments).forEach(function(key) { | ||
| attachments.push(that.getAttachment(key)); | ||
| }); | ||
| return attachments; | ||
| } | ||
| } | ||
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| class AttachmentCellModel extends AttachmentModel { | ||
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| postSaveHook() { | ||
| let cleaned = this.cell.get_text().replace(this.imagePattern, ''); | ||
| cleaned = cleaned.replace(this.infoPattern, ''); | ||
| let n_attachments = Object.keys(this.attachments).length; | ||
| cleaned += '\n### You uploaded ' + n_attachments + ' attachments.\n\n' | ||
| this.cell.set_text(cleaned); | ||
| this.cell.unrender_force(); | ||
| this.cell.render(); | ||
| } | ||
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| getName(name, type) { | ||
| let current_name = name + '.' + type; | ||
| let counter = 0; | ||
| while (current_name in this.attachments) { | ||
| counter += 1; | ||
| current_name = name + '_' + counter + '.' + type; | ||
| } | ||
| return current_name; | ||
| } | ||
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| } | ||
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| class DiagramCellModel extends AttachmentModel { | ||
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| postSaveHook() { | ||
| this.cell.unrender_force(); | ||
| this.cell.render(); | ||
| } | ||
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| } | ||
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| return { | ||
| AttachmentModel: AttachmentModel, | ||
| AttachmentCellModel: AttachmentCellModel, | ||
| DiagramCellModel: DiagramCellModel | ||
| } | ||
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| }); |
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